diff --git a/packages/api/src/beacon/routes/beacon/block.ts b/packages/api/src/beacon/routes/beacon/block.ts
index b56006fe4191..95a32097028d 100644
--- a/packages/api/src/beacon/routes/beacon/block.ts
+++ b/packages/api/src/beacon/routes/beacon/block.ts
@@ -39,6 +39,14 @@ export type BlockHeaderResponse = {
 };
 
 export enum BroadcastValidation {
+  /* 
+  NOTE: The value `none` is not part of the spec. 
+
+  In case a node is configured only with the unknownBlockSync, it needs to know the unknown parent blocks on the network 
+  to initiate the syncing process. Such cases can be covered only if we publish blocks and make sure no gossip validation 
+  is performed on those. But this behavior is not the default.
+  */
+  none = "none",
   gossip = "gossip",
   consensus = "consensus",
   consensusAndEquivocation = "consensus_and_equivocation",
diff --git a/packages/beacon-node/src/api/impl/beacon/blocks/index.ts b/packages/beacon-node/src/api/impl/beacon/blocks/index.ts
index 89565426426e..f2e29f00fe57 100644
--- a/packages/beacon-node/src/api/impl/beacon/blocks/index.ts
+++ b/packages/beacon-node/src/api/impl/beacon/blocks/index.ts
@@ -149,6 +149,11 @@ export function getBeaconBlockApi({
         break;
       }
 
+      case routes.beacon.BroadcastValidation.none: {
+        chain.logger.debug("Skipping broadcast validation", valLogMeta);
+        break;
+      }
+
       default: {
         // error or log warning we do not support this validation
         const message = `Broadcast validation of ${broadcastValidation} type not implemented yet`;