diff --git a/CHANGES.md b/CHANGES.md
index 235c8c63..dda3467d 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -14,6 +14,7 @@ There are likely to be descriptions etc outside of the list below, but new query
 | [#448](https://github.com/ethereum/beacon-APIs/pull/448) `POST /eth/v2/beacon/pool/attestations` added              |                                                  |                                                  |                                                    |                                                 |                                           |
 | [#448](https://github.com/ethereum/beacon-APIs/pull/448) `GET /eth/v2/beacon/pool/attester_slashings` added         |                                                  |                                                  |                                                    |                                                 |                                           |
 | [#448](https://github.com/ethereum/beacon-APIs/pull/448) `POST /eth/v2/beacon/pool/attester_slashings` added        |                                                  |                                                  |                                                    |                                                 |                                           |
+| [#452](https://github.com/ethereum/beacon-APIs/pull/452) `POST /eth/v1/beacon/states/{state_id}/validator_identities` added |                                          |                                                  |                                                    |                                                 |                                           |
 | [#456](https://github.com/ethereum/beacon-APIs/pull/456) `POST /eth/v2/validator/aggregate_and_proofs` added        |                                                  |                                                  |                                                    |                                                 |                                           |
 
 
diff --git a/apis/beacon/blob_sidecars/blob_sidecars.yaml b/apis/beacon/blob_sidecars/blob_sidecars.yaml
index 40321774..e65b4810 100644
--- a/apis/beacon/blob_sidecars/blob_sidecars.yaml
+++ b/apis/beacon/blob_sidecars/blob_sidecars.yaml
@@ -39,7 +39,7 @@ get:
             properties:
               version:
                 type: string
-                enum: [phase0, altair, bellatrix, capella, deneb]
+                enum: [phase0, altair, bellatrix, capella, deneb, electra]
                 example: "deneb"
               execution_optimistic:
                 $ref: "../../../beacon-node-oapi.yaml#/components/schemas/ExecutionOptimistic"
@@ -68,5 +68,7 @@ get:
           example:
             code: 404
             message: "Block not found"
+    "406":
+      $ref: "../../../beacon-node-oapi.yaml#/components/responses/NotAcceptable"
     "500":
       $ref: "../../../beacon-node-oapi.yaml#/components/responses/InternalError"
diff --git a/apis/beacon/blocks/attestations.v2.yaml b/apis/beacon/blocks/attestations.v2.yaml
index 785ed096..dbc6383b 100644
--- a/apis/beacon/blocks/attestations.v2.yaml
+++ b/apis/beacon/blocks/attestations.v2.yaml
@@ -15,6 +15,7 @@ get:
       headers:
         Eth-Consensus-Version:
           $ref: '../../../beacon-node-oapi.yaml#/components/headers/Eth-Consensus-Version'
+          description: "The active consensus version to which the attestations belong."
       content:
         application/json:
           schema:
diff --git a/apis/beacon/blocks/blinded_block.yaml b/apis/beacon/blocks/blinded_block.yaml
index 35e89e7a..8c5f25c7 100644
--- a/apis/beacon/blocks/blinded_block.yaml
+++ b/apis/beacon/blocks/blinded_block.yaml
@@ -26,7 +26,7 @@ get:
             properties:
               version:
                 type: string
-                enum: [phase0, altair, bellatrix, capella, deneb]
+                enum: [phase0, altair, bellatrix, capella, deneb, electra]
                 example: "phase0"
               execution_optimistic:
                 $ref: "../../../beacon-node-oapi.yaml#/components/schemas/ExecutionOptimistic"
@@ -39,6 +39,7 @@ get:
                   - $ref: "../../../beacon-node-oapi.yaml#/components/schemas/Bellatrix.SignedBlindedBeaconBlock"
                   - $ref: "../../../beacon-node-oapi.yaml#/components/schemas/Capella.SignedBlindedBeaconBlock"
                   - $ref: "../../../beacon-node-oapi.yaml#/components/schemas/Deneb.SignedBlindedBeaconBlock"
+                  - $ref: "../../../beacon-node-oapi.yaml#/components/schemas/Electra.SignedBlindedBeaconBlock"
         application/octet-stream:
           schema:
             description: "SSZ serialized block bytes. Use Accept header to choose this response type"
@@ -60,5 +61,7 @@ get:
           example:
             code: 404
             message: "Block not found"
+    "406":
+      $ref: "../../../beacon-node-oapi.yaml#/components/responses/NotAcceptable"
     "500":
       $ref: "../../../beacon-node-oapi.yaml#/components/responses/InternalError"
diff --git a/apis/beacon/blocks/blinded_blocks.v2.yaml b/apis/beacon/blocks/blinded_blocks.v2.yaml
index 9d48718d..24f0d091 100644
--- a/apis/beacon/blocks/blinded_blocks.v2.yaml
+++ b/apis/beacon/blocks/blinded_blocks.v2.yaml
@@ -42,7 +42,7 @@ post:
         $ref: '../../../beacon-node-oapi.yaml#/components/schemas/ConsensusVersion'
       required: true
       name: Eth-Consensus-Version
-      description: "Version of the block being submitted."
+      description: "The active consensus version to which the block being submitted belongs."
   requestBody:
     description: "The `SignedBlindedBeaconBlock` object composed of `BlindedBeaconBlock` object (produced by beacon node) and validator signature."
     required: true
@@ -55,6 +55,7 @@ post:
             - $ref: "../../../beacon-node-oapi.yaml#/components/schemas/Bellatrix.SignedBlindedBeaconBlock"
             - $ref: "../../../beacon-node-oapi.yaml#/components/schemas/Capella.SignedBlindedBeaconBlock"
             - $ref: "../../../beacon-node-oapi.yaml#/components/schemas/Deneb.SignedBlindedBeaconBlock"
+            - $ref: "../../../beacon-node-oapi.yaml#/components/schemas/Electra.SignedBlindedBeaconBlock"
       application/octet-stream:
         schema:
           description: "SSZ serialized block bytes. Use content type header to indicate that SSZ data is contained in the request body."
diff --git a/apis/beacon/blocks/blinded_blocks.yaml b/apis/beacon/blocks/blinded_blocks.yaml
index 1f545e57..b5b70fe5 100644
--- a/apis/beacon/blocks/blinded_blocks.yaml
+++ b/apis/beacon/blocks/blinded_blocks.yaml
@@ -3,6 +3,7 @@ post:
     - Beacon
     - ValidatorRequiredApi
   summary: "Publish a signed block."
+  deprecated: true
   operationId: "publishBlindedBlock"
   description: |
     Instructs the beacon node to use the components of the `SignedBlindedBeaconBlock` to construct and publish a 
@@ -20,7 +21,7 @@ post:
         $ref: '../../../beacon-node-oapi.yaml#/components/schemas/ConsensusVersion'
       required: false
       name: Eth-Consensus-Version
-      description: "Version of the block being submitted, if using SSZ encoding."
+      description: "The active consensus version to which the block being submitted belongs."
   requestBody:
     description: "The `SignedBlindedBeaconBlock` object composed of `BlindedBeaconBlock` object (produced by beacon node) and validator signature."
     required: true
@@ -33,6 +34,7 @@ post:
             - $ref: "../../../beacon-node-oapi.yaml#/components/schemas/Bellatrix.SignedBlindedBeaconBlock"
             - $ref: "../../../beacon-node-oapi.yaml#/components/schemas/Capella.SignedBlindedBeaconBlock"
             - $ref: "../../../beacon-node-oapi.yaml#/components/schemas/Deneb.SignedBlindedBeaconBlock"
+            - $ref: "../../../beacon-node-oapi.yaml#/components/schemas/Electra.SignedBlindedBeaconBlock"
       application/octet-stream:
         schema:
           description: "SSZ serialized block bytes. Use content type header to indicate that SSZ data is contained in the request body."
diff --git a/apis/beacon/blocks/block.v2.yaml b/apis/beacon/blocks/block.v2.yaml
index f1ef818d..05a41595 100644
--- a/apis/beacon/blocks/block.v2.yaml
+++ b/apis/beacon/blocks/block.v2.yaml
@@ -26,7 +26,7 @@ get:
             properties:
               version:
                 type: string
-                enum: [phase0, altair, bellatrix, capella, deneb]
+                enum: [phase0, altair, bellatrix, capella, deneb, electra]
                 example: "phase0"
               execution_optimistic:
                 $ref: "../../../beacon-node-oapi.yaml#/components/schemas/ExecutionOptimistic"
@@ -39,9 +39,9 @@ get:
                   - $ref: "../../../beacon-node-oapi.yaml#/components/schemas/Bellatrix.SignedBeaconBlock"
                   - $ref: "../../../beacon-node-oapi.yaml#/components/schemas/Capella.SignedBeaconBlock"
                   - $ref: "../../../beacon-node-oapi.yaml#/components/schemas/Deneb.SignedBeaconBlock"
+                  - $ref: "../../../beacon-node-oapi.yaml#/components/schemas/Electra.SignedBeaconBlock"
         application/octet-stream:
           schema:
-
             description: "SSZ serialized block bytes. Use Accept header to choose this response type"
     "400":
       description: "The block ID supplied could not be parsed"
@@ -61,5 +61,7 @@ get:
           example:
             code: 404
             message: "Block not found"
+    "406":
+      $ref: "../../../beacon-node-oapi.yaml#/components/responses/NotAcceptable"
     "500":
       $ref: "../../../beacon-node-oapi.yaml#/components/responses/InternalError"
diff --git a/apis/beacon/blocks/blocks.v2.yaml b/apis/beacon/blocks/blocks.v2.yaml
index 45959301..ec5a19ee 100644
--- a/apis/beacon/blocks/blocks.v2.yaml
+++ b/apis/beacon/blocks/blocks.v2.yaml
@@ -41,7 +41,7 @@ post:
         $ref: '../../../beacon-node-oapi.yaml#/components/schemas/ConsensusVersion'
       required: true
       name: Eth-Consensus-Version
-      description: "Version of the block being submitted."
+      description: "The active consensus version to which the block being submitted belongs."
   requestBody:
     description: "The `SignedBeaconBlock` object composed of `BeaconBlock` object (produced by beacon node) and validator signature."
     required: true
@@ -54,6 +54,7 @@ post:
             - $ref: "../../../beacon-node-oapi.yaml#/components/schemas/Bellatrix.SignedBeaconBlock"
             - $ref: "../../../beacon-node-oapi.yaml#/components/schemas/Capella.SignedBeaconBlock"
             - $ref: "../../../beacon-node-oapi.yaml#/components/schemas/Deneb.SignedBlockContents"
+            - $ref: "../../../beacon-node-oapi.yaml#/components/schemas/Electra.SignedBlockContents"
       application/octet-stream:
         schema:
           description: "SSZ serialized block bytes. Use content type header to indicate that SSZ data is contained in the request body."
diff --git a/apis/beacon/blocks/blocks.yaml b/apis/beacon/blocks/blocks.yaml
index 68be1b69..c28fc714 100644
--- a/apis/beacon/blocks/blocks.yaml
+++ b/apis/beacon/blocks/blocks.yaml
@@ -3,6 +3,7 @@ post:
     - Beacon
     - ValidatorRequiredApi
   summary: "Publish a signed block."
+  deprecated: true
   operationId: "publishBlock"
   description: |
     Instructs the beacon node to broadcast a newly signed beacon block to the beacon network,
@@ -19,7 +20,7 @@ post:
         $ref: '../../../beacon-node-oapi.yaml#/components/schemas/ConsensusVersion'
       required: false
       name: Eth-Consensus-Version
-      description: "Version of the block being submitted, if using SSZ encoding."
+      description: "The active consensus version to which the block being submitted belongs."
   requestBody:
     description: "The `SignedBeaconBlock` object composed of `BeaconBlock` object (produced by beacon node) and validator signature."
     required: true
@@ -32,6 +33,7 @@ post:
             - $ref: "../../../beacon-node-oapi.yaml#/components/schemas/Bellatrix.SignedBeaconBlock"
             - $ref: "../../../beacon-node-oapi.yaml#/components/schemas/Capella.SignedBeaconBlock"
             - $ref: "../../../beacon-node-oapi.yaml#/components/schemas/Deneb.SignedBlockContents"
+            - $ref: "../../../beacon-node-oapi.yaml#/components/schemas/Electra.SignedBlockContents"
       application/octet-stream:
         schema:
           description: "SSZ serialized block bytes. Use content type header to indicate that SSZ data is contained in the request body."
diff --git a/apis/beacon/deposit_snapshot.yaml b/apis/beacon/deposit_snapshot.yaml
index 67f26cda..b1c55062 100644
--- a/apis/beacon/deposit_snapshot.yaml
+++ b/apis/beacon/deposit_snapshot.yaml
@@ -3,7 +3,7 @@
     summary: "Get Deposit Tree Snapshot"
     description: |
       Retrieve [EIP-4881](https://eips.ethereum.org/EIPS/eip-4881) Deposit Tree Snapshot.
-      Depending on `Accept` header it can be returned either as json or as bytes serialzed by SSZ
+      Depending on `Accept` header it can be returned either as json or as bytes serialized by SSZ
     tags:
       - Beacon
     responses:
@@ -30,5 +30,7 @@
             example:
               code: 404
               message: "No Finalized Snapshot Available"
+      "406":
+        $ref: "../../beacon-node-oapi.yaml#/components/responses/NotAcceptable"
       "500":
         $ref: '../../beacon-node-oapi.yaml#/components/responses/InternalError'
diff --git a/apis/beacon/light_client/bootstrap.yaml b/apis/beacon/light_client/bootstrap.yaml
index 89b7f1fd..6e3c9544 100644
--- a/apis/beacon/light_client/bootstrap.yaml
+++ b/apis/beacon/light_client/bootstrap.yaml
@@ -32,6 +32,8 @@ get:
                 anyOf:
                   - $ref: '../../../beacon-node-oapi.yaml#/components/schemas/Altair.LightClientBootstrap'
                   - $ref: '../../../beacon-node-oapi.yaml#/components/schemas/Capella.LightClientBootstrap'
+                  - $ref: '../../../beacon-node-oapi.yaml#/components/schemas/Deneb.LightClientBootstrap'
+                  - $ref: '../../../beacon-node-oapi.yaml#/components/schemas/Electra.LightClientBootstrap'
         application/octet-stream:
           schema:
             description: "SSZ serialized `LightClientBootstrap` bytes. Use Accept header to choose this response type"
@@ -54,13 +56,6 @@ get:
             code: 404
             message: "LC bootstrap unavailable"
     "406":
-      description: Unacceptable media type
-      content:
-        application/json:
-          schema:
-            $ref: "../../../beacon-node-oapi.yaml#/components/schemas/ErrorMessage"
-          example:
-            code: 406
-            message: "Accepted media type not supported"
+      $ref: "../../../beacon-node-oapi.yaml#/components/responses/NotAcceptable"
     "500":
       $ref: "../../../beacon-node-oapi.yaml#/components/responses/InternalError"
diff --git a/apis/beacon/light_client/finality_update.yaml b/apis/beacon/light_client/finality_update.yaml
index c1a395d3..3b2015ca 100644
--- a/apis/beacon/light_client/finality_update.yaml
+++ b/apis/beacon/light_client/finality_update.yaml
@@ -27,6 +27,8 @@ get:
                 anyOf:
                   - $ref: '../../../beacon-node-oapi.yaml#/components/schemas/Altair.LightClientFinalityUpdate'
                   - $ref: '../../../beacon-node-oapi.yaml#/components/schemas/Capella.LightClientFinalityUpdate'
+                  - $ref: '../../../beacon-node-oapi.yaml#/components/schemas/Deneb.LightClientFinalityUpdate'
+                  - $ref: '../../../beacon-node-oapi.yaml#/components/schemas/Electra.LightClientFinalityUpdate'
         application/octet-stream:
           schema:
             description: "SSZ serialized `LightClientFinalityUpdate` bytes. Use Accept header to choose this response type"
@@ -40,13 +42,6 @@ get:
             code: 404
             message: "LC finality update unavailable"
     "406":
-      description: Unacceptable media type
-      content:
-        application/json:
-          schema:
-            $ref: "../../../beacon-node-oapi.yaml#/components/schemas/ErrorMessage"
-          example:
-            code: 406
-            message: "Accepted media type not supported"
+      $ref: "../../../beacon-node-oapi.yaml#/components/responses/NotAcceptable"
     "500":
       $ref: "../../../beacon-node-oapi.yaml#/components/responses/InternalError"
diff --git a/apis/beacon/light_client/optimistic_update.yaml b/apis/beacon/light_client/optimistic_update.yaml
index dea560e5..599b104b 100644
--- a/apis/beacon/light_client/optimistic_update.yaml
+++ b/apis/beacon/light_client/optimistic_update.yaml
@@ -27,6 +27,8 @@ get:
                 anyOf:
                   - $ref: '../../../beacon-node-oapi.yaml#/components/schemas/Altair.LightClientOptimisticUpdate'
                   - $ref: '../../../beacon-node-oapi.yaml#/components/schemas/Capella.LightClientOptimisticUpdate'
+                  - $ref: '../../../beacon-node-oapi.yaml#/components/schemas/Deneb.LightClientOptimisticUpdate'
+                  - $ref: '../../../beacon-node-oapi.yaml#/components/schemas/Electra.LightClientOptimisticUpdate'
         application/octet-stream:
           schema:
             description: "SSZ serialized `LightClientOptimisticUpdate` bytes. Use Accept header to choose this response type"
@@ -40,13 +42,6 @@ get:
             code: 404
             message: "LC optimistic update unavailable"
     "406":
-      description: Unacceptable media type
-      content:
-        application/json:
-          schema:
-            $ref: "../../../beacon-node-oapi.yaml#/components/schemas/ErrorMessage"
-          example:
-            code: 406
-            message: "Accepted media type not supported"
+      $ref: "../../../beacon-node-oapi.yaml#/components/responses/NotAcceptable"
     "500":
       $ref: "../../../beacon-node-oapi.yaml#/components/responses/InternalError"
diff --git a/apis/beacon/light_client/updates.yaml b/apis/beacon/light_client/updates.yaml
index 4823d071..d00b667c 100644
--- a/apis/beacon/light_client/updates.yaml
+++ b/apis/beacon/light_client/updates.yaml
@@ -37,6 +37,8 @@ get:
                   anyOf:
                     - $ref: '../../../beacon-node-oapi.yaml#/components/schemas/Altair.LightClientUpdate'
                     - $ref: '../../../beacon-node-oapi.yaml#/components/schemas/Capella.LightClientUpdate'
+                    - $ref: '../../../beacon-node-oapi.yaml#/components/schemas/Deneb.LightClientUpdate'
+                    - $ref: '../../../beacon-node-oapi.yaml#/components/schemas/Electra.LightClientUpdate'
         application/octet-stream:
           schema:
             description: |
@@ -60,7 +62,9 @@ get:
               | ------------------------------------------------------------------- | ------------------------------------- |
               | `GENESIS_FORK_VERSION`                                              | n/a                                   |
               | <nobr>`ALTAIR_FORK_VERSION` through `BELLATRIX_FORK_VERSION`</nobr> | `altair.LightClientUpdate`            |
-              | <nobr>`CAPELLA_FORK_VERSION` and later</nobr>                       | `capella.LightClientUpdate`           |
+              | <nobr>`CAPELLA_FORK_VERSION` </nobr>                                | `capella.LightClientUpdate`           |
+              | <nobr>`DENEB_FORK_VERSION` </nobr>                                  | `deneb.LightClientUpdate`             |
+              | <nobr>`ELECTRA_FORK_VERSION` and later</nobr>                       | `electra.LightClientUpdate`           |
     "400":
       description: Malformed or missing request parameter
       content:
@@ -85,13 +89,6 @@ get:
                 code: 400
                 message: "Missing `count` value"
     "406":
-      description: Unacceptable media type
-      content:
-        application/json:
-          schema:
-            $ref: "../../../beacon-node-oapi.yaml#/components/schemas/ErrorMessage"
-          example:
-            code: 406
-            message: "Accepted media type not supported"
+      $ref: "../../../beacon-node-oapi.yaml#/components/responses/NotAcceptable"
     "500":
       $ref: "../../../beacon-node-oapi.yaml#/components/responses/InternalError"
diff --git a/apis/beacon/pool/attestations.v2.yaml b/apis/beacon/pool/attestations.v2.yaml
index 7a8be747..4e6f48f3 100644
--- a/apis/beacon/pool/attestations.v2.yaml
+++ b/apis/beacon/pool/attestations.v2.yaml
@@ -67,7 +67,7 @@ post:
         $ref: '../../../beacon-node-oapi.yaml#/components/schemas/ConsensusVersion'
       required: true
       name: Eth-Consensus-Version
-      description: "Version of the attestations being submitted."
+      description: "The consensus version to which the attestations being submitted belong."
   tags:
     - Beacon
     - ValidatorRequiredApi
diff --git a/apis/beacon/pool/attester_slashings.v2.yaml b/apis/beacon/pool/attester_slashings.v2.yaml
index 03b44d56..28bec5a6 100644
--- a/apis/beacon/pool/attester_slashings.v2.yaml
+++ b/apis/beacon/pool/attester_slashings.v2.yaml
@@ -42,7 +42,7 @@ post:
         $ref: '../../../beacon-node-oapi.yaml#/components/schemas/ConsensusVersion'
       required: true
       name: Eth-Consensus-Version
-      description: "Version of the attester slashing being submitted."
+      description: "The active consensus version to which the attester slashing being submitted belongs."
   tags:
     - Beacon
   requestBody:
diff --git a/apis/beacon/states/validator_identities.yaml b/apis/beacon/states/validator_identities.yaml
new file mode 100644
index 00000000..4963f5c3
--- /dev/null
+++ b/apis/beacon/states/validator_identities.yaml
@@ -0,0 +1,71 @@
+post:
+  operationId: "postStateValidatorIdentities"
+  summary: "Get validator identities from state"
+  description: |
+    Returns filterable list of validators identities.
+
+    Identities will be returned for all indices or public keys that match known validators. If an index or public key does not
+    match any known validator, no identity will be returned but this will not cause an error. There are no guarantees for the
+    returned data in terms of ordering.
+
+     Depending on `Accept` header data can be returned either as JSON or as bytes serialized by SSZ.
+  tags:
+    - Beacon
+  parameters:
+    - name: state_id
+      in: path
+      $ref: '../../../beacon-node-oapi.yaml#/components/parameters/StateId'
+  requestBody:
+    description: "An array of values, with each value either a hex encoded public key (any bytes48 with 0x prefix) or a validator index."
+    required: false
+    content:
+      application/json:
+        schema:
+          type: array
+          uniqueItems: true
+          items:
+            description: "Either hex encoded public key (any bytes48 with 0x prefix) or validator index"
+            type: string
+  responses:
+    "200":
+      description: Success
+      content:
+        application/json:
+          schema:
+            title: PostStateValidatorIdentitiesResponse
+            type: object
+            required: [execution_optimistic, finalized, data]
+            properties:
+              execution_optimistic:
+                $ref: "../../../beacon-node-oapi.yaml#/components/schemas/ExecutionOptimistic"
+              finalized:
+                $ref: "../../../beacon-node-oapi.yaml#/components/schemas/Finalized"
+              data:
+                type: array
+                items:
+                  $ref: '../../../beacon-node-oapi.yaml#/components/schemas/ValidatorIdentityResponse'
+        application/octet-stream:
+          schema:
+            description: "SSZ serialized results. Use Accept header to choose this response type"
+    "400":
+      description: "Invalid state ID or malformed request"
+      content:
+        application/json:
+          schema:
+            $ref: "../../../beacon-node-oapi.yaml#/components/schemas/ErrorMessage"
+          example:
+            code: 400
+            message: "Invalid state ID: current"
+    "404":
+      description: "State not found"
+      content:
+        application/json:
+          schema:
+            $ref: "../../../beacon-node-oapi.yaml#/components/schemas/ErrorMessage"
+          example:
+            code: 404
+            message: "State not found"
+    "406":
+      $ref: "../../../beacon-node-oapi.yaml#/components/responses/NotAcceptable"
+    "500":
+      $ref: '../../../beacon-node-oapi.yaml#/components/responses/InternalError'
diff --git a/apis/builder/states/expected_withdrawals.yaml b/apis/builder/states/expected_withdrawals.yaml
index a89475c0..1c11b367 100644
--- a/apis/builder/states/expected_withdrawals.yaml
+++ b/apis/builder/states/expected_withdrawals.yaml
@@ -56,5 +56,7 @@ get:
           example:
             code: 404
             message: "State not found"
+    "406":
+      $ref: "../../../beacon-node-oapi.yaml#/components/responses/NotAcceptable"
     "500":
       $ref: '../../../beacon-node-oapi.yaml#/components/responses/InternalError'
\ No newline at end of file
diff --git a/apis/debug/state.v2.yaml b/apis/debug/state.v2.yaml
index d58ed771..cdfa17a7 100644
--- a/apis/debug/state.v2.yaml
+++ b/apis/debug/state.v2.yaml
@@ -26,7 +26,7 @@ get:
             properties:
               version:
                 type: string
-                enum: [ phase0, altair, bellatrix, capella, deneb ]
+                enum: [phase0, altair, bellatrix, capella, deneb, electra]
                 example: "phase0"
               execution_optimistic:
                 $ref: "../../beacon-node-oapi.yaml#/components/schemas/ExecutionOptimistic"
@@ -39,6 +39,7 @@ get:
                  - $ref: "../../beacon-node-oapi.yaml#/components/schemas/Bellatrix.BeaconState"
                  - $ref: "../../beacon-node-oapi.yaml#/components/schemas/Capella.BeaconState"
                  - $ref: "../../beacon-node-oapi.yaml#/components/schemas/Deneb.BeaconState"
+                 - $ref: "../../beacon-node-oapi.yaml#/components/schemas/Electra.BeaconState"
         application/octet-stream:
           schema:
             description: "SSZ serialized state bytes. Use Accept header to choose this response type"
@@ -60,6 +61,8 @@ get:
           example:
             code: 404
             message: "State not found"
+    "406":
+      $ref: "../../beacon-node-oapi.yaml#/components/responses/NotAcceptable"
     "500":
       $ref: '../../beacon-node-oapi.yaml#/components/responses/InternalError'
 
diff --git a/apis/validator/aggregate_and_proofs.v2.yaml b/apis/validator/aggregate_and_proofs.v2.yaml
index 9d46f7e5..7f024972 100644
--- a/apis/validator/aggregate_and_proofs.v2.yaml
+++ b/apis/validator/aggregate_and_proofs.v2.yaml
@@ -11,7 +11,7 @@ post:
         $ref: '../../beacon-node-oapi.yaml#/components/schemas/ConsensusVersion'
       required: true
       name: Eth-Consensus-Version
-      description: "Version of the aggregate and proofs being submitted."
+      description: "The active consensus version to which the aggregate and proofs being submitted belong."
   requestBody:
     required: true
     content:
diff --git a/apis/validator/blinded_block.yaml b/apis/validator/blinded_block.yaml
index d8a6e6a8..72c60519 100644
--- a/apis/validator/blinded_block.yaml
+++ b/apis/validator/blinded_block.yaml
@@ -49,7 +49,7 @@ get:
             properties:
               version:
                 type: string
-                enum: [ phase0, altair, bellatrix, capella, deneb ]
+                enum: [phase0, altair, bellatrix, capella, deneb, electra]
                 example: "bellatrix"
               data:
                 anyOf:
@@ -58,6 +58,7 @@ get:
                   - $ref: "../../beacon-node-oapi.yaml#/components/schemas/Bellatrix.BlindedBeaconBlock"
                   - $ref: "../../beacon-node-oapi.yaml#/components/schemas/Capella.BlindedBeaconBlock"
                   - $ref: "../../beacon-node-oapi.yaml#/components/schemas/Deneb.BlindedBeaconBlock"
+                  - $ref: "../../beacon-node-oapi.yaml#/components/schemas/Electra.BlindedBeaconBlock"
         application/octet-stream:
           schema:
             description: "SSZ serialized block bytes. Use Accept header to choose this response type, version string is sent in header `Eth-Consensus-Version`."
@@ -72,6 +73,8 @@ get:
               value:
                 code: 400
                 message: "Invalid request to produce a block"
+    "406":
+      $ref: "../../beacon-node-oapi.yaml#/components/responses/NotAcceptable"
     "500":
       $ref: '../../beacon-node-oapi.yaml#/components/responses/InternalError'
     "503":
diff --git a/apis/validator/block.v2.yaml b/apis/validator/block.v2.yaml
index ff3fc8cb..4ee38d0f 100644
--- a/apis/validator/block.v2.yaml
+++ b/apis/validator/block.v2.yaml
@@ -46,7 +46,7 @@ get:
             properties:
               version:
                 type: string
-                enum: [ phase0, altair, bellatrix, capella, deneb ]
+                enum: [phase0, altair, bellatrix, capella, deneb, electra]
                 example: "phase0"
               data:
                 anyOf:
@@ -55,6 +55,7 @@ get:
                  - $ref: "../../beacon-node-oapi.yaml#/components/schemas/Bellatrix.BeaconBlock"
                  - $ref: "../../beacon-node-oapi.yaml#/components/schemas/Capella.BeaconBlock"
                  - $ref: "../../beacon-node-oapi.yaml#/components/schemas/Deneb.BlockContents"
+                 - $ref: "../../beacon-node-oapi.yaml#/components/schemas/Electra.BlockContents"
         application/octet-stream:
           schema:
             description: "SSZ serialized block bytes. Use Accept header to choose this response type, version string is sent in header `Eth-Consensus-Version`."
@@ -69,6 +70,8 @@ get:
               value:
                 code: 400
                 message: "Invalid request to produce a block"
+    "406":
+      $ref: "../../beacon-node-oapi.yaml#/components/responses/NotAcceptable"
     "500":
       $ref: '../../beacon-node-oapi.yaml#/components/responses/InternalError'
     "503":
diff --git a/apis/validator/block.v3.yaml b/apis/validator/block.v3.yaml
index b5f4d858..b1eb5cc7 100644
--- a/apis/validator/block.v3.yaml
+++ b/apis/validator/block.v3.yaml
@@ -53,18 +53,17 @@ get:
         Servers must support the following values of the boost factor which encode common
         preferences:
 
-        * `builder_boost_factor=0`: prefer the execution node payload unless an error makes it
+        * `builder_boost_factor=0`: prefer the local execution node payload unless an error makes it
           unviable.
-        * `builder_boost_factor=100`: default profit maximization mode; choose whichever
+        * `builder_boost_factor=100`: profit maximization mode; choose whichever
           payload pays more.
-        * `builder_boost_factor=2**64 - 1`: prefer the builder payload unless an error or
+        * `builder_boost_factor=2**64 - 1`: prefer the external builder payload unless an error or
           beacon node health check makes it unviable.
 
         Servers should use saturating arithmetic or another technique to ensure that large values of
         the `builder_boost_factor` do not trigger overflows or errors. If this parameter is
         provided and the beacon node is not configured with a builder then the beacon node MUST
-        respond with a full block, which the caller can choose to reject if it wishes. If this
-        parameter is **not** provided then it should be treated as having the default value of 100.
+        respond with a full block, which the caller can choose to reject if it wishes.
         If the value is provided but out of range for a 64-bit unsigned integer, then an error
         response with status code 400 MUST be returned.
       schema:
@@ -90,7 +89,7 @@ get:
             properties:
               version:
                 type: string
-                enum: [ phase0, altair, bellatrix, capella, deneb ]
+                enum: [phase0, altair, bellatrix, capella, deneb, electra]
                 example: "phase0"
               execution_payload_blinded:
                 type: boolean
@@ -111,6 +110,8 @@ get:
                  - $ref: "../../beacon-node-oapi.yaml#/components/schemas/Capella.BlindedBeaconBlock"
                  - $ref: "../../beacon-node-oapi.yaml#/components/schemas/Deneb.BlockContents"
                  - $ref: "../../beacon-node-oapi.yaml#/components/schemas/Deneb.BlindedBeaconBlock"
+                 - $ref: "../../beacon-node-oapi.yaml#/components/schemas/Electra.BlockContents"
+                 - $ref: "../../beacon-node-oapi.yaml#/components/schemas/Electra.BlindedBeaconBlock"
         application/octet-stream:
           schema:
             description: "SSZ serialized block or blinded block bytes. Use Accept header to choose this response type, version string is sent in header `Eth-Consensus-Version` and block type in `Eth-Blinded-Payload`."
@@ -125,6 +126,8 @@ get:
               value:
                 code: 400
                 message: "Invalid request to produce a block"
+    "406":
+      $ref: "../../beacon-node-oapi.yaml#/components/responses/NotAcceptable"
     "500":
       $ref: '../../beacon-node-oapi.yaml#/components/responses/InternalError'
     "503":
diff --git a/beacon-node-oapi.yaml b/beacon-node-oapi.yaml
index dc560c00..f2f33929 100644
--- a/beacon-node-oapi.yaml
+++ b/beacon-node-oapi.yaml
@@ -6,9 +6,15 @@ info:
     API specification for the beacon node, which enables users to query and participate in Ethereum 2.0 phase 0 beacon chain.
 
     All requests by default send and receive JSON, and as such should have either or both of the "Content-Type: application/json"
-    and "Accept: application/json" headers.  In addition, some requests can return data in the SSZ format.  To indicate that SSZ
-    data is required in response to a request the header "Accept: application/octet-stream" should be sent.  Note that only a subset
-    of requests can respond with data in SSZ format; these are noted in each individual request.
+    and "Accept: application/json" headers.  In addition, some requests can send and receive data in the SSZ format.  The header
+    "Content-Type: application/octet-stream" should be set in requests that contain SSZ data; a preference to receive SSZ data in
+    response can be indicated by setting the "Accept: application/octet-stream;q=1.0,application/json;q=0.9" header.  Note that
+    only a subset of requests can respond with data in SSZ format; these are noted in each individual request.
+
+    When handling requests, the server should return a 415 status code if the "Content-Type" header in the request specifies a format
+    that is not supported.  Similarly, it should return a 406 status code if it cannot produce a response in the format accepted by
+    the client as specified in the "Accept" header; if no "Accept" header is provided then it is assumed to be "application/json".
+    In any case, the server should indicate the format of the response by setting the corresponding "Content-Type" header.
 
     API endpoints are individually versioned.  As such, there is no direct relationship between all v1 endpoints, all v2 endpoints,
     _etc._ and no such relationship should be inferred.  All JSON responses return the requested data under a `data` key in the top
@@ -75,6 +81,8 @@ paths:
     $ref: "./apis/beacon/states/validator.yaml"
   /eth/v1/beacon/states/{state_id}/validator_balances:
     $ref: "./apis/beacon/states/validator_balances.yaml"
+  /eth/v1/beacon/states/{state_id}/validator_identities:
+    $ref: "./apis/beacon/states/validator_identities.yaml"
   /eth/v1/beacon/states/{state_id}/committees:
     $ref: "./apis/beacon/states/committee.yaml"
   /eth/v1/beacon/states/{state_id}/sync_committees:
@@ -234,6 +242,8 @@ components:
       $ref: './types/api.yaml#/ValidatorResponse'
     ValidatorBalanceResponse:
       $ref: './types/api.yaml#/ValidatorBalanceResponse'
+    ValidatorIdentityResponse:
+      $ref: './types/api.yaml#/ValidatorIdentityResponse'
     ValidatorStatus:
       $ref: './types/api.yaml#/ValidatorStatus'
     Committee:
@@ -378,16 +388,44 @@ components:
       $ref: './types/deneb/block.yaml#/Deneb/BlindedBeaconBlock'
     Deneb.SignedBlindedBeaconBlock:
       $ref: './types/deneb/block.yaml#/Deneb/SignedBlindedBeaconBlock'
+    Deneb.LightClientBootstrap:
+      $ref: './types/deneb/light_client.yaml#/Deneb/LightClientBootstrap'
+    Deneb.LightClientUpdate:
+      $ref: './types/deneb/light_client.yaml#/Deneb/LightClientUpdate'
+    Deneb.LightClientFinalityUpdate:
+      $ref: './types/deneb/light_client.yaml#/Deneb/LightClientFinalityUpdate'
+    Deneb.LightClientOptimisticUpdate:
+      $ref: './types/deneb/light_client.yaml#/Deneb/LightClientOptimisticUpdate'
     Blob:
       $ref: './types/primitive.yaml#/Blob'
     Deneb.BlobSidecars:
       $ref: './types/deneb/blob_sidecar.yaml#/Deneb/BlobSidecars'
+    Electra.BeaconState:
+      $ref: './types/electra/state.yaml#/Electra/BeaconState'
+    Electra.BlockContents:
+      $ref: './types/electra/block_contents.yaml#/Electra/BlockContents'
+    Electra.SignedBeaconBlock:
+      $ref: './types/electra/block.yaml#/Electra/SignedBeaconBlock'
+    Electra.SignedBlockContents:
+      $ref: './types/electra/block_contents.yaml#/Electra/SignedBlockContents'
+    Electra.BlindedBeaconBlock:
+      $ref: './types/electra/block.yaml#/Electra/BlindedBeaconBlock'
+    Electra.SignedBlindedBeaconBlock:
+      $ref: './types/electra/block.yaml#/Electra/SignedBlindedBeaconBlock'
     Electra.Attestation:
       $ref: './types/electra/attestation.yaml#/Electra/Attestation'
     Electra.AttesterSlashing:
       $ref: './types/electra/attester_slashing.yaml#/Electra/AttesterSlashing'
     Electra.SignedAggregateAndProof:
       $ref: './types/electra/validator.yaml#/Electra/SignedAggregateAndProof'
+    Electra.LightClientBootstrap:
+      $ref: './types/electra/light_client.yaml#/Electra/LightClientBootstrap'
+    Electra.LightClientUpdate:
+      $ref: './types/electra/light_client.yaml#/Electra/LightClientUpdate'
+    Electra.LightClientFinalityUpdate:
+      $ref: './types/electra/light_client.yaml#/Electra/LightClientFinalityUpdate'
+    Electra.LightClientOptimisticUpdate:
+      $ref: './types/electra/light_client.yaml#/Electra/LightClientOptimisticUpdate'
     Node:
       $ref: './types/fork_choice.yaml#/Node'
     ExtraData:
@@ -414,6 +452,8 @@ components:
       $ref: './types/http.yaml#/InvalidRequest'
     NotFound:
       $ref: './types/http.yaml#/NotFound'
+    NotAcceptable:
+      $ref: './types/http.yaml#/NotAcceptable'
     UnsupportedMediaType:
       $ref: './types/http.yaml#/UnsupportedMediaType'
     InternalError:
@@ -425,7 +465,9 @@ components:
 
   headers:
     Eth-Consensus-Version:
-      description: Required in response so client can deserialize returned json or ssz data more effectively.
+      description: |
+        The active consensus version to which the data belongs. Required in response so client can deserialize returned json or ssz data 
+        more effectively.
       required: true
       schema:
         $ref: '#/components/schemas/ConsensusVersion'
diff --git a/types/api.yaml b/types/api.yaml
index 8d1dd9fc..8b577e16 100644
--- a/types/api.yaml
+++ b/types/api.yaml
@@ -45,6 +45,20 @@ ValidatorBalanceResponse:
       $ref: "./primitive.yaml#/Gwei"
       description: "Current validator balance in gwei."
 
+ValidatorIdentityResponse:
+  type: object
+  required: [index, pubkey, activation_epoch]
+  properties:
+    index:
+      $ref: './primitive.yaml#/Uint64'
+      description: "Index of validator in validator registry."
+    pubkey:
+      $ref: './primitive.yaml#/Pubkey'
+      description: "Public key of validator."
+    activation_epoch:
+      $ref: "./primitive.yaml#/Uint64"
+      description: "Epoch when validator activated. 'FAR_FUTURE_EPOCH' if not activated"
+
 ValidatorStatus:
   description: |
     Possible statuses:
diff --git a/types/deneb/block.yaml b/types/deneb/block.yaml
index 4891c25f..d58607a5 100644
--- a/types/deneb/block.yaml
+++ b/types/deneb/block.yaml
@@ -54,7 +54,7 @@ Deneb:
             $ref: './execution_payload.yaml#/Deneb/ExecutionPayload'
 
   BeaconBlock:
-    description: "The [`BeaconBlock`](https://github.com/ethereum/consensus-specs/blob/master/specs/deneb/beacon-chain.md#beaconblock) object from the CL Deneb spec."
+    description: "The [`BeaconBlock`](https://github.com/ethereum/consensus-specs/blob/master/specs/phase0/beacon-chain.md#beaconblock) object from the CL Deneb spec."
     allOf:
       - $ref: '../altair/block.yaml#/Altair/BeaconBlockCommon'
       - type: object
@@ -65,7 +65,7 @@ Deneb:
 
   SignedBeaconBlock:
     type: object
-    description: "The [`SignedBeaconBlock`](https://github.com/ethereum/consensus-specs/blob/master/specs/deneb/beacon-chain.md#signedbeaconblock) object envelope from the CL Deneb spec."
+    description: "The [`SignedBeaconBlock`](https://github.com/ethereum/consensus-specs/blob/master/specs/phase0/beacon-chain.md#signedbeaconblock) object envelope from the CL Deneb spec."
     required: [message, signature]
     properties:
       message:
@@ -84,7 +84,7 @@ Deneb:
             $ref: './execution_payload.yaml#/Deneb/ExecutionPayloadHeader'
 
   BlindedBeaconBlock:
-    description: "A variant of the [`BeaconBlock`](https://github.com/ethereum/consensus-specs/blob/master/specs/deneb/beacon-chain.md#beaconblock) object from the CL Deneb spec, which contains a `BlindedBeaconBlockBody` rather than a `BeaconBlockBody`."
+    description: "A variant of the [`BeaconBlock`](https://github.com/ethereum/consensus-specs/blob/master/specs/phase0/beacon-chain.md#beaconblock) object from the CL Deneb spec, which contains a `BlindedBeaconBlockBody` rather than a `BeaconBlockBody`."
     allOf:
       - $ref: '../altair/block.yaml#/Altair/BeaconBlockCommon'
       - type: object
@@ -95,7 +95,7 @@ Deneb:
 
   SignedBlindedBeaconBlock:
     type: object
-    description: "A variant of the [`SignedBeaconBlock`](https://github.com/ethereum/consensus-specs/blob/master/specs/deneb/beacon-chain.md#signedbeaconblock) object envelope from the CL Deneb spec, which contains a `BlindedBeaconBlock` rather than a `BeaconBlock`."
+    description: "A variant of the [`SignedBeaconBlock`](https://github.com/ethereum/consensus-specs/blob/master/specs/phase0/beacon-chain.md#signedbeaconblock) object envelope from the CL Deneb spec, which contains a `BlindedBeaconBlock` rather than a `BeaconBlock`."
     required: [message, signature]
     properties:
       message:
diff --git a/types/deneb/light_client.yaml b/types/deneb/light_client.yaml
new file mode 100644
index 00000000..64e01d1b
--- /dev/null
+++ b/types/deneb/light_client.yaml
@@ -0,0 +1,64 @@
+Deneb:
+  LightClientHeader:
+    type: object
+    required: [beacon, execution, execution_branch]
+    properties:
+      beacon:
+        $ref: '../block.yaml#/BeaconBlockHeader'
+      execution:
+        $ref: './execution_payload.yaml#/Deneb/ExecutionPayloadHeader'
+      execution_branch:
+        $ref: '../capella/light_client.yaml#/Capella/ExecutionBranch'
+
+  LightClientBootstrap:
+    type: object
+    required: [header, current_sync_committee, current_sync_committee_branch]
+    properties:
+      header:
+        $ref: '#/Deneb/LightClientHeader'
+      current_sync_committee:
+        $ref: '../altair/sync_committee.yaml#/Altair/SyncCommittee'
+      current_sync_committee_branch:
+        $ref: '../altair/light_client.yaml#/Altair/CurrentSyncCommitteeBranch'
+  LightClientUpdate:
+    type: object
+    required: [attested_header, next_sync_committee, next_sync_committee_branch, finalized_header, finality_branch, sync_aggregate, signature_slot]
+    properties:
+      attested_header:
+        $ref: '#/Deneb/LightClientHeader'
+      next_sync_committee:
+        $ref: '../altair/sync_committee.yaml#/Altair/SyncCommittee'
+      next_sync_committee_branch:
+        $ref: '../altair/light_client.yaml#/Altair/NextSyncCommitteeBranch'
+      finalized_header:
+        $ref: '#/Deneb/LightClientHeader'
+      finality_branch:
+        $ref: '../altair/light_client.yaml#/Altair/FinalityBranch'
+      sync_aggregate:
+        $ref: '../altair/sync_aggregate.yaml#/Altair/SyncAggregate'
+      signature_slot:
+        $ref: '../primitive.yaml#/Uint64'
+  LightClientFinalityUpdate:
+    type: object
+    required: [attested_header, finalized_header, finality_branch, sync_aggregate, signature_slot]
+    properties:
+      attested_header:
+        $ref: '#/Deneb/LightClientHeader'
+      finalized_header:
+        $ref: '#/Deneb/LightClientHeader'
+      finality_branch:
+        $ref: '../altair/light_client.yaml#/Altair/FinalityBranch'
+      sync_aggregate:
+        $ref: '../altair/sync_aggregate.yaml#/Altair/SyncAggregate'
+      signature_slot:
+        $ref: '../primitive.yaml#/Uint64'
+  LightClientOptimisticUpdate:
+    type: object
+    required: [attested_header, sync_aggregate, signature_slot]
+    properties:
+      attested_header:
+        $ref: '#/Deneb/LightClientHeader'
+      sync_aggregate:
+        $ref: '../altair/sync_aggregate.yaml#/Altair/SyncAggregate'
+      signature_slot:
+        $ref: '../primitive.yaml#/Uint64'
diff --git a/types/electra/block.yaml b/types/electra/block.yaml
new file mode 100644
index 00000000..db460fd3
--- /dev/null
+++ b/types/electra/block.yaml
@@ -0,0 +1,108 @@
+Electra:
+  BeaconBlockBodyCommon:
+    # An abstract object to collect the common fields between the BeaconBlockBody and the BlindedBeaconBlockBody objects
+    type: object
+    description: "The [`BeaconBlockBody`](https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.5/specs/electra/beacon-chain.md#beaconblockbody) object from the CL Electra spec."
+    required: [randao_reveal, eth1_data, graffiti, proposer_slashings, attester_slashings, attestations, deposits, voluntary_exits, sync_aggregate, bls_to_execution_changes, blob_kzg_commitments]
+    properties:
+      randao_reveal:
+        allOf:
+          - $ref: "../primitive.yaml#/Signature"
+          - description: "The RANDAO reveal value provided by the validator."
+      eth1_data:
+        $ref: "../eth1.yaml#/Eth1Data"
+      graffiti:
+        $ref: "../primitive.yaml#/Graffiti"
+      proposer_slashings:
+        type: array
+        items:
+          $ref: "../proposer_slashing.yaml#/ProposerSlashing"
+      attester_slashings:
+        type: array
+        items:
+          $ref: "./attester_slashing.yaml#/Electra/AttesterSlashing"
+      attestations:
+        type: array
+        items:
+          $ref: "./attestation.yaml#/Electra/Attestation"
+      deposits:
+        type: array
+        items:
+          $ref: "../deposit.yaml#/Deposit"
+      voluntary_exits:
+        type: array
+        items:
+          $ref: "../voluntary_exit.yaml#/SignedVoluntaryExit"
+      sync_aggregate:
+        $ref: "../altair/sync_aggregate.yaml#/Altair/SyncAggregate"
+      bls_to_execution_changes:
+        type: array
+        items:
+          $ref: "../bls_to_execution_change.yaml#/SignedBLSToExecutionChange"
+      blob_kzg_commitments:
+        type: array
+        items:
+          $ref: "../primitive.yaml#/KZGCommitment"
+
+  BeaconBlockBody:
+    allOf:
+      - $ref: "#/Electra/BeaconBlockBodyCommon"
+      - type: object
+        required: [execution_payload, execution_requests]
+        properties:
+          execution_payload:
+            $ref: "../deneb/execution_payload.yaml#/Deneb/ExecutionPayload"
+          execution_requests:
+            $ref: "./execution_requests.yaml#/Electra/ExecutionRequests"
+
+  BeaconBlock:
+    description: "The [`BeaconBlock`](https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.5/specs/phase0/beacon-chain.md#beaconblock) object from the CL Electra spec."
+    allOf:
+      - $ref: "../altair/block.yaml#/Altair/BeaconBlockCommon"
+      - type: object
+        required: [body]
+        properties:
+          body:
+            $ref: "#/Electra/BeaconBlockBody"
+
+  SignedBeaconBlock:
+    type: object
+    description: "The [`SignedBeaconBlock`](https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.5/specs/phase0/beacon-chain.md#signedbeaconblock) object envelope from the CL Electra spec."
+    required: [message, signature]
+    properties:
+      message:
+        $ref: "#/Electra/BeaconBlock"
+      signature:
+        $ref: "../primitive.yaml#/Signature"
+
+  BlindedBeaconBlockBody:
+    description: "A variant of the [`BeaconBlockBody`](https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.5/specs/electra/beacon-chain.md#beaconblockbody) object from the CL Electra spec, which contains a transactions root rather than a full transactions list."
+    allOf:
+      - $ref: "#/Electra/BeaconBlockBodyCommon"
+      - type: object
+        required: [execution_payload_header, execution_requests_root]
+        properties:
+          execution_payload_header:
+            $ref: "../deneb/execution_payload.yaml#/Deneb/ExecutionPayloadHeader"
+          execution_requests_root:
+            $ref: "../primitive.yaml#/Root"
+
+  BlindedBeaconBlock:
+    description: "A variant of the [`BeaconBlock`](https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.5/specs/phase0/beacon-chain.md#beaconblock) object from the CL Electra spec, which contains a `BlindedBeaconBlockBody` rather than a `BeaconBlockBody`."
+    allOf:
+      - $ref: "../altair/block.yaml#/Altair/BeaconBlockCommon"
+      - type: object
+        required: [body]
+        properties:
+          body:
+            $ref: "#/Electra/BlindedBeaconBlockBody"
+
+  SignedBlindedBeaconBlock:
+    type: object
+    description: "A variant of the [`SignedBeaconBlock`](https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.5/specs/phase0/beacon-chain.md#signedbeaconblock) object envelope from the CL Electra spec, which contains a `BlindedBeaconBlock` rather than a `BeaconBlock`."
+    required: [message, signature]
+    properties:
+      message:
+        $ref: "#/Electra/BlindedBeaconBlock"
+      signature:
+        $ref: "../primitive.yaml#/Signature"
diff --git a/types/electra/block_contents.yaml b/types/electra/block_contents.yaml
new file mode 100644
index 00000000..d4a38519
--- /dev/null
+++ b/types/electra/block_contents.yaml
@@ -0,0 +1,24 @@
+Electra:
+  BlockContents:
+    type: object
+    description: "The required object for block production according to the Electra CL spec."
+    required: [block, kzg_proofs, blobs]
+    properties:
+      block:
+        $ref: "./block.yaml#/Electra/BeaconBlock"
+      kzg_proofs:
+        $ref: "../deneb/block_contents.yaml#/Deneb/KZGProofs"
+      blobs:
+        $ref: "../deneb/block_contents.yaml#/Deneb/Blobs"
+
+  SignedBlockContents:
+    type: object
+    description: "The required signed components of block production according to the Electra CL spec."
+    required: [signed_block, kzg_proofs, blobs]
+    properties:
+      signed_block:
+        $ref: "./block.yaml#/Electra/SignedBeaconBlock"
+      kzg_proofs:
+        $ref: "../deneb/block_contents.yaml#/Deneb/KZGProofs"
+      blobs:
+        $ref: "../deneb/block_contents.yaml#/Deneb/Blobs"
diff --git a/types/electra/consolidation.yaml b/types/electra/consolidation.yaml
new file mode 100644
index 00000000..94b9a75e
--- /dev/null
+++ b/types/electra/consolidation.yaml
@@ -0,0 +1,27 @@
+Electra:
+  ConsolidationRequest:
+    type: object
+    description: "The [`ConsolidationRequest`](https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.5/specs/electra/beacon-chain.md#consolidationrequest) object from the CL Electra spec."
+    required: [source_address, source_pubkey, target_pubkey]
+    properties:
+      source_address:
+        $ref: "../primitive.yaml#/ExecutionAddress"
+        description: "Execution address which sent the request."
+      source_pubkey:
+        $ref: "../primitive.yaml#/Pubkey"
+        description: "BLS public key of validator to consolidate from."
+      target_pubkey:
+        $ref: "../primitive.yaml#/Pubkey"
+        description: "BLS public key of validator to consolidate to."
+
+  PendingConsolidation:
+    type: object
+    description: "The [`PendingConsolidation`](https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.5/specs/electra/beacon-chain.md#pendingconsolidation) object from the CL Electra spec."
+    required: [source_index, target_index]
+    properties:
+      source_index:
+        $ref: "../primitive.yaml#/Uint64"
+        description: "Index of validator to consolidate from."
+      target_index:
+        $ref: "../primitive.yaml#/Uint64"
+        description: "Index of validator to consolidate to."
diff --git a/types/electra/deposit.yaml b/types/electra/deposit.yaml
new file mode 100644
index 00000000..e124df7c
--- /dev/null
+++ b/types/electra/deposit.yaml
@@ -0,0 +1,32 @@
+Electra:
+  DepositRequest:
+    type: object
+    description: "The [`DepositRequest`](https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.5/specs/electra/beacon-chain.md#depositrequest) object from the CL Electra spec."
+    required: [pubkey, withdrawal_credentials, amount, signature, index]
+    properties:
+      pubkey:
+        $ref: "../primitive.yaml#/Pubkey"
+        description: "BLS public key of validator."
+      withdrawal_credentials:
+        $ref: "../primitive.yaml#/Root"
+        description: "The withdrawal credentials."
+      amount:
+        $ref: "../primitive.yaml#/Gwei"
+        description: "The value to be deposited (gwei)."
+      signature:
+        $ref: "../primitive.yaml#/Signature"
+      index:
+        $ref: "../primitive.yaml#/Uint64"
+        description: "The index of the deposit request."
+
+  PendingBalanceDeposit:
+    type: object
+    description: "The [`PendingBalanceDeposit`](https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.5/specs/electra/beacon-chain.md#pendingbalancedeposit) object from the CL Electra spec."
+    required: [index, amount]
+    properties:
+      index:
+        $ref: "../primitive.yaml#/Uint64"
+        description: "Index of validator in validator registry."
+      amount:
+        $ref: "../primitive.yaml#/Gwei"
+        description: "The value to be deposited (gwei)."
diff --git a/types/electra/execution_requests.yaml b/types/electra/execution_requests.yaml
new file mode 100644
index 00000000..1851c89b
--- /dev/null
+++ b/types/electra/execution_requests.yaml
@@ -0,0 +1,21 @@
+Electra:  
+  ExecutionRequests:
+    type: object
+    description: "The [`ExecutionRequests`](https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.6/specs/electra/beacon-chain.md#executionrequests) object from the CL Electra spec."
+    required: [deposits, withdrawals, consolidations]
+    properties:
+      deposits:
+        type: array
+        items:
+          $ref: "./deposit.yaml#/Electra/DepositRequest"
+        maxItems: 8192
+      withdrawals:
+        type: array
+        items:
+          $ref: "./withdrawal.yaml#/Electra/WithdrawalRequest"
+        maxItems: 16
+      consolidations:
+        type: array
+        items:
+          $ref: "./consolidation.yaml#/Electra/ConsolidationRequest"
+        maxItems: 1
diff --git a/types/electra/light_client.yaml b/types/electra/light_client.yaml
new file mode 100644
index 00000000..01187cc9
--- /dev/null
+++ b/types/electra/light_client.yaml
@@ -0,0 +1,75 @@
+Electra:
+  FinalityBranch:
+    type: array
+    items:
+      $ref: '../primitive.yaml#/Root'
+      description: "Merkle proof consisting of [`log2trunc(FINALIZED_ROOT_GINDEX_ELECTRA])`](https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/specs/electra/light-client/sync-protocol.md#constants) roots"
+    minItems: 7
+    maxItems: 7
+  CurrentSyncCommitteeBranch:
+    type: array
+    items:
+      $ref: '../primitive.yaml#/Root'
+      description: "Merkle proof consisting of [`log2trunc(CURRENT_SYNC_COMMITTEE_GINDEX_ELECTRA])`](https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/specs/electra/light-client/sync-protocol.md#constants) roots"
+    minItems: 6
+    maxItems: 6
+  NextSyncCommitteeBranch:
+    type: array
+    items:
+      $ref: '../primitive.yaml#/Root'
+      description: "Merkle proof consisting of [`log2trunc(NEXT_SYNC_COMMITTEE_GINDEX_ELECTRA])`](https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/specs/electra/light-client/sync-protocol.md#constants) roots"
+    minItems: 6
+    maxItems: 6
+    
+  LightClientBootstrap:
+    type: object
+    required: [header, current_sync_committee, current_sync_committee_branch]
+    properties:
+      header:
+        $ref: '../deneb/light_client.yaml#/Deneb/LightClientHeader'
+      current_sync_committee:
+        $ref: '../altair/sync_committee.yaml#/Altair/SyncCommittee'
+      current_sync_committee_branch:
+        $ref: '#/Electra/CurrentSyncCommitteeBranch'
+  LightClientUpdate:
+    type: object
+    required: [attested_header, next_sync_committee, next_sync_committee_branch, finalized_header, finality_branch, sync_aggregate, signature_slot]
+    properties:
+      attested_header:
+        $ref: '../deneb/light_client.yaml#/Deneb/LightClientHeader'
+      next_sync_committee:
+        $ref: '../altair/sync_committee.yaml#/Altair/SyncCommittee'
+      next_sync_committee_branch:
+        $ref: '#/Electra/NextSyncCommitteeBranch'
+      finalized_header:
+        $ref: '../deneb/light_client.yaml#/Deneb/LightClientHeader'
+      finality_branch:
+        $ref: '#/Electra/FinalityBranch'
+      sync_aggregate:
+        $ref: '../altair/sync_aggregate.yaml#/Altair/SyncAggregate'
+      signature_slot:
+        $ref: '../primitive.yaml#/Uint64'
+  LightClientFinalityUpdate:
+    type: object
+    required: [attested_header, finalized_header, finality_branch, sync_aggregate, signature_slot]
+    properties:
+      attested_header:
+        $ref: '../deneb/light_client.yaml#/Deneb/LightClientHeader'
+      finalized_header:
+        $ref: '../deneb/light_client.yaml#/Deneb/LightClientHeader'
+      finality_branch:
+        $ref: '#/Electra/FinalityBranch'
+      sync_aggregate:
+        $ref: '../altair/sync_aggregate.yaml#/Altair/SyncAggregate'
+      signature_slot:
+        $ref: '../primitive.yaml#/Uint64'
+  LightClientOptimisticUpdate:
+    type: object
+    required: [attested_header, sync_aggregate, signature_slot]
+    properties:
+      attested_header:
+        $ref: '../deneb/light_client.yaml#/Deneb/LightClientHeader'
+      sync_aggregate:
+        $ref: '../altair/sync_aggregate.yaml#/Altair/SyncAggregate'
+      signature_slot:
+        $ref: '../primitive.yaml#/Uint64'
diff --git a/types/electra/state.yaml b/types/electra/state.yaml
new file mode 100644
index 00000000..7798a372
--- /dev/null
+++ b/types/electra/state.yaml
@@ -0,0 +1,121 @@
+Electra:
+  BeaconState:
+    type: object
+    description: "The [`BeaconState`](https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.5/specs/electra/beacon-chain.md#beaconstate) object from the CL Electra spec."
+    required: [genesis_time, genesis_validators_root, slot, fork, latest_block_header, block_roots, state_roots, historical_roots, eth1_data, eth1_data_votes, eth1_deposit_index, validators, balances, randao_mixes, slashings, previous_epoch_participation, current_epoch_participation, justification_bits, previous_justified_checkpoint, current_justified_checkpoint, finalized_checkpoint, inactivity_scores, current_sync_committee, next_sync_committee, latest_execution_payload_header, next_withdrawal_index, next_withdrawal_validator_index, historical_summaries, deposit_requests_start_index, deposit_balance_to_consume, exit_balance_to_consume, earliest_exit_epoch, consolidation_balance_to_consume, earliest_consolidation_epoch, pending_balance_deposits, pending_partial_withdrawals, pending_consolidations]
+    properties:
+      genesis_time:
+        $ref: "../primitive.yaml#/Uint64"
+      genesis_validators_root:
+        $ref: "../primitive.yaml#/Root"
+      slot:
+        $ref: "../primitive.yaml#/Uint64"
+      fork:
+        $ref: "../misc.yaml#/Fork"
+      latest_block_header:
+        $ref: "../block.yaml#/BeaconBlockHeader"
+      block_roots:
+        type: array
+        description: "Fixed length of 8192 items"
+        items:
+          $ref: "../primitive.yaml#/Root"
+      state_roots:
+        type: array
+        description: "Fixed length of 8192 items"
+        items:
+          $ref: "../primitive.yaml#/Root"
+      historical_roots:
+        type: array
+        description: "Variable length list, maximum 16777216 items. Frozen in Capella, replaced by historical_summaries."
+        items:
+          $ref: "../primitive.yaml#/Root"
+      eth1_data:
+        $ref: "../eth1.yaml#/Eth1Data"
+      eth1_data_votes:
+        type: array
+        description: "Fixed length of 1024 items"
+        items:
+          $ref: "../eth1.yaml#/Eth1Data"
+        maxItems: 1024
+      eth1_deposit_index:
+        $ref: "../primitive.yaml#/Uint64"
+      validators:
+        type: array
+        description: "Variable length list, maximum 1099511627776 items"
+        items:
+          $ref: "../validator.yaml#/Validator"
+      balances:
+        type: array
+        description: "Validator balances in gwei. Variable length list, maximum 1099511627776 items"
+        items:
+          $ref: '../primitive.yaml#/Uint64'
+      randao_mixes:
+        type: array
+        description: "Fixed length of 65536 items"
+        items:
+          $ref: "../primitive.yaml#/Bytes32"
+      slashings:
+        type: array
+        description: "Per-epoch sums of slashed effective balances. Fixed length of 8192 items"
+        items:
+          $ref: "../primitive.yaml#/Uint64"
+      previous_epoch_participation:
+        $ref: "../altair/epoch_participation.yaml#/Altair/EpochParticipation"
+      current_epoch_participation:
+        $ref: "../altair/epoch_participation.yaml#/Altair/EpochParticipation"
+      justification_bits:
+        $ref: "../primitive.yaml#/BitList"
+        description: "Bit set for every recent justified epoch"
+      previous_justified_checkpoint:
+        $ref: "../misc.yaml#/Checkpoint"
+      current_justified_checkpoint:
+        $ref: "../misc.yaml#/Checkpoint"
+      finalized_checkpoint:
+        $ref: "../misc.yaml#/Checkpoint"
+      inactivity_scores:
+        description: "Per-validator inactivity scores. Introduced in Altair. Variable length list, maximum 1099511627776 items"
+        type: array
+        items:
+          $ref: "../primitive.yaml#/Uint64"
+      current_sync_committee:
+        $ref: "../altair/sync_committee.yaml#/Altair/SyncCommittee"
+      next_sync_committee:
+        $ref: "../altair/sync_committee.yaml#/Altair/SyncCommittee"
+      latest_execution_payload_header:
+        $ref: "../deneb/execution_payload.yaml#/Deneb/ExecutionPayloadHeader"
+      next_withdrawal_index:
+        $ref: "../primitive.yaml#/Uint64"
+      next_withdrawal_validator_index:
+        $ref: "../primitive.yaml#/Uint64"
+      historical_summaries:
+        type: array
+        items:
+          $ref: "../capella/historical_summary.yaml#/Capella/HistoricalSummary"
+        description: "Variable length list, maximum 16777216 items"
+      deposit_requests_start_index:
+        $ref: "../primitive.yaml#/Uint64"
+      deposit_balance_to_consume:
+        $ref: "../primitive.yaml#/Gwei"
+      exit_balance_to_consume:
+        $ref: "../primitive.yaml#/Gwei"
+      earliest_exit_epoch:
+        $ref: "../primitive.yaml#/Uint64"
+      consolidation_balance_to_consume:
+        $ref: "../primitive.yaml#/Gwei"
+      earliest_consolidation_epoch:
+        $ref: "../primitive.yaml#/Uint64"
+      pending_balance_deposits:
+        type: array
+        items:
+          $ref: "./deposit.yaml#/Electra/PendingBalanceDeposit"
+        maxItems: 134217728
+      pending_partial_withdrawals:
+        type: array
+        items:
+          $ref: "./withdrawal.yaml#/Electra/PendingPartialWithdrawal"
+        maxItems: 134217728
+      pending_consolidations:
+        type: array
+        items:
+          $ref: "./consolidation.yaml#/Electra/PendingConsolidation"
+        maxItems: 262144
diff --git a/types/electra/withdrawal.yaml b/types/electra/withdrawal.yaml
new file mode 100644
index 00000000..bca58715
--- /dev/null
+++ b/types/electra/withdrawal.yaml
@@ -0,0 +1,30 @@
+Electra:  
+  WithdrawalRequest:
+    type: object
+    description: "The [`WithdrawalRequest`](https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.5/specs/electra/beacon-chain.md#withdrawalrequest) object from the CL Electra spec."
+    required: [source_address, validator_pubkey, amount]
+    properties:
+      source_address:
+        $ref: "../primitive.yaml#/ExecutionAddress"
+        description: "Execution address which sent the request."
+      validator_pubkey:
+        $ref: "../primitive.yaml#/Pubkey"
+        description: "BLS public key of validator."
+      amount:
+        $ref: "../primitive.yaml#/Gwei"
+        description: "The value to be withdrawn (gwei)."
+
+  PendingPartialWithdrawal:
+    type: object
+    description: "The [`PendingPartialWithdrawal`](https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.5/specs/electra/beacon-chain.md#pendingpartialwithdrawal) object from the CL Electra spec."
+    required: [index, amount, withdrawable_epoch]
+    properties:
+      index:
+        $ref: "../primitive.yaml#/Uint64"
+        description: "Index of validator in validator registry."
+      amount:
+        $ref: "../primitive.yaml#/Uint64"
+        description: "The value to be withdrawn (gwei)."
+      withdrawable_epoch:
+        $ref: "../primitive.yaml#/Uint64"
+        description: "The epoch when the amount is withdrawable."
diff --git a/types/http.yaml b/types/http.yaml
index 60ec9a33..a0bee7aa 100644
--- a/types/http.yaml
+++ b/types/http.yaml
@@ -110,8 +110,31 @@ NotFound:
       example:
         code: 404
         message: "Requested item not found"
+NotAcceptable:
+  description: "Accepted media type is not supported."
+  content:
+    application/json:
+      schema:
+        type: object
+        required: [code, message]
+        properties:
+          code:
+            description: "The media type in \"Accept\" header is unsupported, and the request has been rejected. This occurs when the server cannot produce a response in the format accepted by the client."
+            type: number
+            example: 406
+          message:
+            description: "Message describing error"
+            type: string
+          stacktraces:
+            description: "Optional stacktraces, sent when node is in debug mode"
+            type: array
+            items:
+              type: string
+      example:
+        code: 406
+        message: "Accepted media type not supported"
 UnsupportedMediaType:
-  description: "The supplied content-type is not supported."
+  description: "Supplied content-type is not supported."
   content:
     application/json:
       schema:
@@ -119,7 +142,7 @@ UnsupportedMediaType:
         required: [code, message]
         properties:
           code:
-            description: "The media type supplied is unsupported, and the request has been rejected. This occurs when a HTTP request supplies a payload in a content-type that the service is not able to accept."
+            description: "The media type in \"Content-Type\" header is unsupported, and the request has been rejected. This occurs when a HTTP request supplies a payload in a content-type that the server is not able to handle."
             type: number
             example: 415
           message: