diff --git a/cabal.project b/cabal.project
index 55af858a..bc1404ca 100644
--- a/cabal.project
+++ b/cabal.project
@@ -13,6 +13,7 @@ packages:
   , instrumentation/conduit
   , instrumentation/grpc-haskell
   , instrumentation/hedis
+  , instrumentation/herp-logger-datadog
   , instrumentation/hspec
   , instrumentation/http-client
   , instrumentation/persistent
@@ -25,6 +26,7 @@ packages:
   , examples/yesod-minimal
   , examples/yesod-subsite
   , utils/exceptions
+  , vendors/datadog
 
 -- https://github.com/vincenthz/hs-memory/pull/93
 source-repository-package
@@ -34,11 +36,16 @@ source-repository-package
 
 source-repository-package
     type: git
-    location: http://github.com/awakesecurity/gRPC-haskell
+    location: https://github.com/awakesecurity/gRPC-haskell
     tag: 0b37ef53702ca315526fbd1643edb8880517ad62
     subdir: . core
     -- HEAD of master at 2023-06-09
 
+source-repository-package
+    type: git
+    location: https://github.com/herp-inc/herp-logger
+    tag: v0.3
+
 allow-newer:
     http-api-data:base
   , postgresql-simple:base
diff --git a/hie.yaml b/hie.yaml
index 44e6e69a..e240c010 100644
--- a/hie.yaml
+++ b/hie.yaml
@@ -92,6 +92,9 @@ cradle:
             - path: "instrumentation/hedis/gen"
               component: "lib:hs-opentelemetry-instrumentation-hedis"
 
+            - path: "instrumentation/herp-logger-datadog/src"
+              component: "lib:hs-opentelemetry-instrumentation-herp-logger-datadog"
+
             - path: "instrumentation/hspec/src"
               component: "lib:hs-opentelemetry-instrumentation-hspec"
 
@@ -184,3 +187,9 @@ cradle:
 
             - path: "utils/exceptions/test"
               component: "hs-opentelemetry-utils-exceptions:test:exceptions-test"
+
+            - path: "vendors/datadog"
+              component: "lib:hs-opentelemetry-vendor-datadog"
+
+            - path: "vendors/datadog/test/spec"
+              component: "hs-opentelemetry-vendors-datadog:test:spec"
diff --git a/instrumentation/herp-logger-datadog/hs-opentelemetry-instrumentation-herp-loger-datadog.cabal b/instrumentation/herp-logger-datadog/hs-opentelemetry-instrumentation-herp-loger-datadog.cabal
new file mode 100644
index 00000000..8bf82558
--- /dev/null
+++ b/instrumentation/herp-logger-datadog/hs-opentelemetry-instrumentation-herp-loger-datadog.cabal
@@ -0,0 +1,54 @@
+cabal-version: 2.4
+
+name: hs-opentelemetry-instrumentation-herp-loger-datadog
+version: 0.0.0.0
+author: Kazuki Okamoto (岡本和樹)
+maintainer: kazuki.okamoto@herp.co.jp
+
+common common
+  build-depends: base >= 4 && < 5
+  ghc-options: -Wall
+  if impl(ghc >= 8.0)
+    ghc-options: -Wcompat
+  default-language: Haskell2010
+
+library
+  import: common
+  hs-source-dirs: src
+  exposed-modules: OpenTelemetry.Instrumentation.Herp.Logger.Datadog
+  build-depends: hs-opentelemetry-api,
+                 hs-opentelemetry-vendor-datadog,
+                 aeson,
+                 herp-logger,
+                 monad-logger,
+                 mtl,
+                 text,
+  ghc-options: -Wcompat
+               -Wno-name-shadowing
+  if impl(ghc >= 6.4)
+    ghc-options: -Wincomplete-record-updates
+  if impl(ghc >= 6.8)
+    ghc-options: -Wmonomorphism-restriction
+  if impl(ghc >= 7.0)
+    ghc-options: -Wmissing-import-lists
+  if impl(ghc >= 7.2)
+    ghc-options: -Wincomplete-uni-patterns
+                 -Widentities
+  if impl(ghc >= 8.0)
+    ghc-options: -Wmissing-exported-signatures
+                 -Wredundant-constraints
+  if impl(ghc >= 8.2)
+    ghc-options: -Wmissing-home-modules
+  if impl(ghc >= 8.4)
+    ghc-options: -Wmissing-export-lists
+                 -Wpartial-fields
+  if impl(ghc >= 8.8)
+    ghc-options: -Wmissing-deriving-strategies
+  if impl(ghc >= 8.10)
+    ghc-options: -Wunused-packages
+  if impl(ghc >= 9.0)
+    ghc-options: -Winvalid-haddock
+  if impl(ghc >= 9.2)
+    ghc-options: -Wmissing-kind-signatures
+                 -Woperator-whitespace
+                 -Wredundant-bang-patterns
diff --git a/instrumentation/herp-logger-datadog/src/OpenTelemetry/Instrumentation/Herp/Logger/Datadog.hs b/instrumentation/herp-logger-datadog/src/OpenTelemetry/Instrumentation/Herp/Logger/Datadog.hs
new file mode 100644
index 00000000..f06be2cb
--- /dev/null
+++ b/instrumentation/herp-logger-datadog/src/OpenTelemetry/Instrumentation/Herp/Logger/Datadog.hs
@@ -0,0 +1,180 @@
+{-# LANGUAGE NamedFieldPuns #-}
+{-# LANGUAGE OverloadedLabels #-}
+{-# LANGUAGE OverloadedLists #-}
+{-# LANGUAGE OverloadedStrings #-}
+{-# LANGUAGE TupleSections #-}
+
+-- | This is herp-logger with connections of OpenTelemetry Traces and Logs.
+--
+-- Datadog functionality about connections of Traces and Logs is described in
+-- <https://docs.datadoghq.com/tracing/other_telemetry/connect_logs_and_traces/opentelemetry/ Connect OpenTelemetry Traces and Logs>.
+--
+-- This logger requires 'Otel.Tracer' to retrieve OpenTelemetry context additionally.
+module OpenTelemetry.Instrumentation.Herp.Logger.Datadog (
+  (Orig..=),
+  Orig.Logger (..),
+  Orig.HasLogger (..),
+  Orig.LogLevel (..),
+  Orig.LoggerConfig (..),
+  Orig.newLogger,
+  Orig.withLogger,
+  Orig.defaultLoggerConfig,
+  logM,
+  logOtherM,
+  logDebugM,
+  logInfoM,
+  logNoticeM,
+  logWarnM,
+  logErrorM,
+  logCritM,
+  logAlertM,
+  logEmergM,
+  logIO,
+  Orig.urgentLog,
+  Orig.flush,
+
+  -- * Payload
+  Orig.Payload,
+  Orig.level,
+  Orig.message,
+  Orig.object,
+  Orig.messageString,
+  Orig.messageShow,
+  Orig.messageException,
+
+  -- * monad-logger
+  runLoggingT,
+  toLoggerIO,
+) where
+
+import Control.Applicative (Alternative ((<|>)))
+import Control.Monad (void)
+import Control.Monad.IO.Class (MonadIO)
+import qualified Control.Monad.Logger as ML
+import Control.Monad.Reader.Class (MonadReader (ask))
+import qualified Data.Aeson.KeyMap as Aeson
+import qualified Data.Aeson.Types as Aeson
+import Data.Maybe (maybeToList)
+import Data.Text (Text)
+import qualified Data.Text as Text
+import qualified Data.Text.Encoding as Text
+import Herp.Logger ((.=))
+import qualified Herp.Logger as Orig
+import qualified Herp.Logger.LogLevel as Orig
+import qualified Herp.Logger.Payload as Orig
+import qualified OpenTelemetry.Attributes as Otel
+import qualified OpenTelemetry.Context as Otel
+import qualified OpenTelemetry.Context.ThreadLocal as Otel
+import qualified OpenTelemetry.Resource as Otel
+import qualified OpenTelemetry.Trace.Core as Otel
+import qualified OpenTelemetry.Vendor.Datadog as Datadog
+
+
+logIO :: MonadIO m => Otel.Tracer -> Orig.Logger -> Orig.Payload -> m ()
+logIO tracer logger payload = do
+  context <- Otel.getContext
+  payload' <- datadogPayload (Otel.getTracerTracerProvider tracer) $ Otel.lookupSpan context
+  Orig.logIO logger (payload' <> payload)
+{-# INLINE logIO #-}
+
+
+logM :: (MonadIO m, MonadReader r m, Orig.HasLogger r, Otel.HasTracer r) => Orig.Payload -> m ()
+logM payload = do
+  r <- ask
+  void $ flip Otel.tracerL r $ \tracer -> do
+    logIO tracer (Orig.toLogger r) payload
+    pure tracer
+{-# INLINE logM #-}
+
+
+logOtherM :: (MonadIO m, MonadReader r m, Orig.HasLogger r, Otel.HasTracer r) => Orig.LogLevel -> Orig.Payload -> m ()
+logOtherM logLevel payload = logM $ Orig.level logLevel <> payload
+
+
+logDebugM :: (MonadIO m, MonadReader r m, Orig.HasLogger r, Otel.HasTracer r) => Orig.Payload -> m ()
+logDebugM = logOtherM Orig.Debug
+
+
+logInfoM :: (MonadIO m, MonadReader r m, Orig.HasLogger r, Otel.HasTracer r) => Orig.Payload -> m ()
+logInfoM = logOtherM Orig.Informational
+
+
+logNoticeM :: (MonadIO m, MonadReader r m, Orig.HasLogger r, Otel.HasTracer r) => Orig.Payload -> m ()
+logNoticeM = logOtherM Orig.Notice
+
+
+logWarnM :: (MonadIO m, MonadReader r m, Orig.HasLogger r, Otel.HasTracer r) => Orig.Payload -> m ()
+logWarnM = logOtherM Orig.Warning
+
+
+logErrorM :: (MonadIO m, MonadReader r m, Orig.HasLogger r, Otel.HasTracer r) => Orig.Payload -> m ()
+logErrorM = logOtherM Orig.Error
+
+
+logCritM :: (MonadIO m, MonadReader r m, Orig.HasLogger r, Otel.HasTracer r) => Orig.Payload -> m ()
+logCritM = logOtherM Orig.Critical
+
+
+logAlertM :: (MonadIO m, MonadReader r m, Orig.HasLogger r, Otel.HasTracer r) => Orig.Payload -> m ()
+logAlertM = logOtherM Orig.Alert
+
+
+logEmergM :: (MonadIO m, MonadReader r m, Orig.HasLogger r, Otel.HasTracer r) => Orig.Payload -> m ()
+logEmergM = logOtherM Orig.Emergency
+
+
+runLoggingT :: Otel.Tracer -> Orig.Logger -> ML.LoggingT m a -> m a
+runLoggingT tracer logger (ML.LoggingT run) = run $ toLoggerIO tracer logger
+
+
+toLoggerIO :: Otel.Tracer -> Orig.Logger -> ML.Loc -> ML.LogSource -> ML.LogLevel -> ML.LogStr -> IO ()
+toLoggerIO tracer logger loc logSrc lv logStr = do
+  let msg = Text.decodeUtf8 $ ML.fromLogStr $ ML.defaultLogStr loc logSrc lv logStr
+  logIO
+    tracer
+    logger
+    [ Orig.message msg
+    , case Orig.convertLogLevel lv of
+        Right x -> Orig.level x
+        Left other -> [#warn, "level" .= other]
+    ]
+
+
+datadogPayload :: MonadIO m => Otel.TracerProvider -> Maybe Otel.Span -> m Orig.Payload
+datadogPayload tracerProvider maybeSpan = do
+  (maybeSpanId, maybeTraceId) <-
+    case maybeSpan of
+      Nothing -> pure (Nothing, Nothing)
+      Just span -> do
+        Otel.SpanContext {Otel.spanId, Otel.traceId} <- Otel.getSpanContext span
+        pure
+          ( Just $ Text.pack $ show $ Datadog.convertOpenTelemetrySpanIdToDatadogSpanId spanId
+          , Just $ Text.pack $ show $ Datadog.convertOpenTelemetryTraceIdToDatadogTraceId traceId
+          )
+  let
+    attributes = Otel.getMaterializedResourcesAttributes $ Otel.getTracerProviderResources tracerProvider
+    maybeEnv = attributeAsText =<< Otel.lookupAttribute attributes Datadog.envKey
+    maybeService =
+      attributeAsText
+        =<< ( Otel.lookupAttribute attributes Datadog.serviceKey
+                <|>
+                -- "service.name" is the same key in the OpenTelemetry.Resource.Service module
+                Otel.lookupAttribute attributes "service.name"
+            )
+    maybeVersion = attributeAsText =<< Otel.lookupAttribute attributes Datadog.versionKey
+  pure $
+    (\payloadObject -> mempty {Orig.payloadObject}) $
+      Aeson.fromList $
+        mconcat $
+          maybeToList
+            <$> [ ("span_id",) . Aeson.String <$> maybeSpanId
+                , ("trace_id",) . Aeson.String <$> maybeTraceId
+                , ("dd.env",) . Aeson.String <$> maybeEnv
+                , ("dd.service",) . Aeson.String <$> maybeService
+                , ("dd.version",) . Aeson.String <$> maybeVersion
+                ]
+
+
+attributeAsText :: Otel.Attribute -> Maybe Text
+attributeAsText (Otel.AttributeValue (Otel.TextAttribute a)) = Just a
+attributeAsText _ = Nothing
diff --git a/propagators/datadog/hs-opentelemetry-propagator-datadog.cabal b/propagators/datadog/hs-opentelemetry-propagator-datadog.cabal
index 911e92eb..e427744d 100644
--- a/propagators/datadog/hs-opentelemetry-propagator-datadog.cabal
+++ b/propagators/datadog/hs-opentelemetry-propagator-datadog.cabal
@@ -20,6 +20,7 @@ library
   build-depends: bytestring,
                  hs-opentelemetry-api,
                  hs-opentelemetry-sdk,
+                 hs-opentelemetry-vendor-datadog,
                  http-types,
                  primitive,
                  text
@@ -59,8 +60,7 @@ test-suite spec
   main-is: Spec.hs
   hs-source-dirs: test/spec
                   old-src
-  other-modules: OpenTelemetry.Propagator.DatadogSpec
-                 OpenTelemetry.Propagator.Datadog.InternalSpec
+  other-modules: OpenTelemetry.Propagator.Datadog.InternalSpec
                  Raw
                  String
   build-depends: hs-opentelemetry-propagator-datadog,
diff --git a/propagators/datadog/src/OpenTelemetry/Propagator/Datadog.hs b/propagators/datadog/src/OpenTelemetry/Propagator/Datadog.hs
index 9aaa2ca0..60a91c2f 100644
--- a/propagators/datadog/src/OpenTelemetry/Propagator/Datadog.hs
+++ b/propagators/datadog/src/OpenTelemetry/Propagator/Datadog.hs
@@ -4,16 +4,11 @@
 
 module OpenTelemetry.Propagator.Datadog (
   datadogTraceContextPropagator,
-  convertOpenTelemetrySpanIdToDatadogSpanId,
-  convertOpenTelemetryTraceIdToDatadogTraceId,
 ) where
 
 import qualified Data.ByteString.Char8 as BC
-import qualified Data.ByteString.Short.Internal as SBI
-import Data.Primitive (ByteArray (ByteArray))
 import Data.String (IsString)
 import qualified Data.Text as T
-import Data.Word (Word64)
 import Network.HTTP.Types (
   RequestHeaders,
   ResponseHeaders,
@@ -30,7 +25,6 @@ import OpenTelemetry.Internal.Trace.Id (
  )
 import OpenTelemetry.Propagator (Propagator (Propagator, extractor, injector, propagatorNames))
 import OpenTelemetry.Propagator.Datadog.Internal (
-  indexByteArrayNbo,
   newHeaderFromSpanId,
   newHeaderFromTraceId,
   newSpanIdFromHeader,
@@ -45,9 +39,6 @@ import OpenTelemetry.Trace.TraceState (TraceState (TraceState))
 import qualified OpenTelemetry.Trace.TraceState as TS
 
 
--- Reference: bi-directional conversion of IDs of Open Telemetry and ones of Datadog
--- - English: https://docs.datadoghq.com/tracing/other_telemetry/connect_logs_and_traces/opentelemetry/
--- - Japanese: https://docs.datadoghq.com/ja/tracing/connect_logs_and_traces/opentelemetry/
 datadogTraceContextPropagator :: Propagator Context RequestHeaders ResponseHeaders
 datadogTraceContextPropagator =
   Propagator
@@ -94,11 +85,3 @@ datadogTraceContextPropagator =
     traceIdKey = "x-datadog-trace-id"
     parentIdKey = "x-datadog-parent-id"
     samplingPriorityKey = "x-datadog-sampling-priority"
-
-
-convertOpenTelemetrySpanIdToDatadogSpanId :: SpanId -> Word64
-convertOpenTelemetrySpanIdToDatadogSpanId (SpanId (SBI.SBS a)) = indexByteArrayNbo (ByteArray a) 0
-
-
-convertOpenTelemetryTraceIdToDatadogTraceId :: TraceId -> Word64
-convertOpenTelemetryTraceIdToDatadogTraceId (TraceId (SBI.SBS a)) = indexByteArrayNbo (ByteArray a) 1
diff --git a/propagators/datadog/src/OpenTelemetry/Propagator/Datadog/Internal.hs b/propagators/datadog/src/OpenTelemetry/Propagator/Datadog/Internal.hs
index 8ffba4cd..3ee1c87b 100644
--- a/propagators/datadog/src/OpenTelemetry/Propagator/Datadog/Internal.hs
+++ b/propagators/datadog/src/OpenTelemetry/Propagator/Datadog/Internal.hs
@@ -2,26 +2,13 @@
 {-# LANGUAGE OverloadedStrings #-}
 {-# LANGUAGE Strict #-}
 
-{- | Conversion of the hs-opentelemetry internal representation of the trace ID and the span ID and the Datadog header representation of them each other.
-
-+----------+-----------------+----------------+
-|          | Trace ID        | Span ID        |
-+----------+-----------------+----------------+
-| Internal | 128-bit integer | 64-bit integer |
-+----------+-----------------+----------------+
-| Datadog  | ASCII text of   | ASCII text of  |
-| Header   | 64-bit integer  | 64-bit integer |
-+----------+-----------------+----------------+
--}
 module OpenTelemetry.Propagator.Datadog.Internal (
   newTraceIdFromHeader,
   newSpanIdFromHeader,
   newHeaderFromTraceId,
   newHeaderFromSpanId,
-  indexByteArrayNbo,
 ) where
 
-import Data.Bits (Bits (shift))
 import Data.ByteString (ByteString)
 import qualified Data.ByteString.Builder as BB
 import qualified Data.ByteString.Internal as BI
@@ -30,11 +17,12 @@ import Data.ByteString.Short (ShortByteString)
 import qualified Data.ByteString.Short as SB
 import qualified Data.ByteString.Short.Internal as SBI
 import qualified Data.Char as C
-import Data.Primitive.ByteArray (ByteArray (ByteArray), indexByteArray)
+import Data.Primitive.ByteArray (ByteArray (ByteArray))
 import Data.Primitive.Ptr (writeOffPtr)
 import Data.Word (Word64, Word8)
 import Foreign.ForeignPtr (withForeignPtr)
 import Foreign.Storable (peekElemOff)
+import OpenTelemetry.Vendor.Datadog.Internal (indexByteArrayNbo)
 import System.IO.Unsafe (unsafeDupablePerformIO)
 
 
@@ -105,19 +93,6 @@ newHeaderFromSpanId (SBI.SBS ba) =
    in showWord64BS w64
 
 
--- | Read 'ByteArray' to 'Word64' with network-byte-order.
-indexByteArrayNbo ::
-  ByteArray ->
-  -- | Offset in 'Word64'-size unit
-  Int ->
-  Word64
-indexByteArrayNbo ba offset =
-  loop 0 0
-  where
-    loop 8 acc = acc
-    loop n acc = loop (n + 1) $ shift acc 8 + word8ToWord64 (indexByteArray ba $ 8 * offset + n)
-
-
 showWord64BS :: Word64 -> ByteString
 showWord64BS v =
   -- Safe.
@@ -141,7 +116,3 @@ showWord64BS v =
 
 word8ToAsciiWord8 :: Word8 -> Word8
 word8ToAsciiWord8 b = b + fromIntegral (C.ord '0')
-
-
-word8ToWord64 :: Word8 -> Word64
-word8ToWord64 = fromIntegral
diff --git a/stack-ghc-8.10.yaml b/stack-ghc-8.10.yaml
index a4d12126..46b4d0ce 100644
--- a/stack-ghc-8.10.yaml
+++ b/stack-ghc-8.10.yaml
@@ -47,6 +47,7 @@ packages:
 - instrumentation/cloudflare
 # - instrumentation/grpc-haskell # able to be built with cabal
 - instrumentation/hedis
+# - instrumentation/herp-logger-datadog
 - instrumentation/http-client
 - instrumentation/persistent
 - instrumentation/persistent-mysql
@@ -57,6 +58,7 @@ packages:
 - examples/yesod-minimal
 - examples/yesod-subsite
 - utils/exceptions
+- vendors/datadog
 
 # Dependency packages to be pulled from upstream that are not in the resolver.
 # These entries can reference officially published versions as well as
@@ -74,6 +76,8 @@ extra-deps:
 - persistent-postgresql-2.13.4.0
 - proto-lens-0.7.1.0
 - proto-lens-runtime-0.7.0.1
+# - github: herp-inc/herp-logger
+#   commit: v0.3
 # just for testing
 # - mwc-random-0.14.0.0
 # - random-1.1
diff --git a/stack-ghc-8.10.yaml.lock b/stack-ghc-8.10.yaml.lock
index 90397a55..0b92d472 100644
--- a/stack-ghc-8.10.yaml.lock
+++ b/stack-ghc-8.10.yaml.lock
@@ -7,48 +7,48 @@ packages:
 - completed:
     hackage: thread-utils-context-0.2.0.0@sha256:7863e568c7a43cd21616342d20484d4c962aaa9710619f104c6fb7ee32273940,1883
     pantry-tree:
-      size: 450
       sha256: 605ea068880ad39c96fce0d91db9f2d54553ed43dfc41c37845fade8be2e9568
+      size: 450
   original:
     hackage: thread-utils-context-0.2.0.0
 - completed:
     hackage: thread-utils-finalizers-0.1.0.0@sha256:a8435240bfc0ae96c94704d2986699a11a395c496f9a7f2e5f5d729a0b967549,1381
     pantry-tree:
-      size: 400
       sha256: 7f708d158d5d0e32ffe77f6375a792ceb6f92e4d8dd8b32fc69e7de962e7e518
+      size: 400
   original:
     hackage: thread-utils-finalizers-0.1.0.0
 - completed:
     hackage: persistent-2.13.3.0@sha256:89a4a286ec3739d452f67332a03a392aa57c3e97237b61efcd5b99d50aae9cfc,6762
     pantry-tree:
-      size: 6052
       sha256: debd3496e44bf01264de8bc0d3da92991c1550632fe1ef66818392f4c9955323
+      size: 6052
   original:
     hackage: persistent-2.13.3.0
 - completed:
     hackage: persistent-postgresql-2.13.4.0@sha256:7fc0ffc4a591c0355c8ad793bc6de08c13321c81a3fb748c9a23448ac88d987a,3686
     pantry-tree:
-      size: 1140
       sha256: 78b6907bf9bc82a524251dfeb2cf0d3f8c599427c8ae0b0a1d933158b6909281
+      size: 1140
   original:
     hackage: persistent-postgresql-2.13.4.0
 - completed:
     hackage: proto-lens-0.7.1.0@sha256:b151890929e71db5b8c2ad86cd758bcdf1dfcf25f34eb6c9ce19e3d7cd4eae39,2959
     pantry-tree:
-      size: 1857
       sha256: 2f1199d04d0588805e06faa0bf9a75898584d76243d4f945acbcc0e93913732e
+      size: 1857
   original:
     hackage: proto-lens-0.7.1.0
 - completed:
     hackage: proto-lens-runtime-0.7.0.1@sha256:703f327422b2e204f8ea13c5e178edd8ab42ccd01c7a5a89fcb1b37ab474c68a,3038
     pantry-tree:
-      size: 168
       sha256: 145cb9a15b73d45b07cb3f9f0716256b2ed9e27ac296268ce100a4f0e477e110
+      size: 168
   original:
     hackage: proto-lens-runtime-0.7.0.1
 snapshots:
 - completed:
+    sha256: 8699812d2b2c1f83d6ad1261de9cf628ed36a1cfc14f19d67188e005e7a3a39d
     size: 586106
     url: https://raw.githubusercontent.com/commercialhaskell/stackage-snapshots/master/lts/18/20.yaml
-    sha256: 8699812d2b2c1f83d6ad1261de9cf628ed36a1cfc14f19d67188e005e7a3a39d
   original: lts-18.20
diff --git a/stack-ghc-9.2.yaml b/stack-ghc-9.2.yaml
index 66906db1..4eb2bf93 100644
--- a/stack-ghc-9.2.yaml
+++ b/stack-ghc-9.2.yaml
@@ -47,6 +47,7 @@ packages:
 - instrumentation/cloudflare
 # - instrumentation/grpc-haskell # able to be built with cabal
 - instrumentation/hedis
+# - instrumentation/herp-logger-datadog
 - instrumentation/http-client
 - instrumentation/persistent
 - instrumentation/persistent-mysql
@@ -57,6 +58,7 @@ packages:
 - examples/yesod-minimal
 - examples/yesod-subsite
 - utils/exceptions
+- vendors/datadog
 
 # Dependency packages to be pulled from upstream that are not in the resolver.
 # These entries can reference officially published versions as well as
@@ -72,7 +74,6 @@ extra-deps:
 - thread-utils-finalizers-0.1.0.0
 - proto-lens-0.7.1.1
 - proto-lens-runtime-0.7.0.2
-
 # just for testing
 # - mwc-random-0.14.0.0
 # - random-1.1
diff --git a/stack.yaml b/stack.yaml
index 5c183d30..b230a533 100644
--- a/stack.yaml
+++ b/stack.yaml
@@ -47,6 +47,7 @@ packages:
 - instrumentation/cloudflare
 # - instrumentation/grpc-haskell # able to be built with cabal
 - instrumentation/hedis
+# - instrumentation/herp-logger-datadog
 - instrumentation/hspec
 - instrumentation/http-client
 - instrumentation/persistent
@@ -58,6 +59,7 @@ packages:
 - examples/yesod-minimal
 - examples/yesod-subsite
 - utils/exceptions
+- vendors/datadog
 
 # Dependency packages to be pulled from upstream that are not in the resolver.
 # These entries can reference officially published versions as well as
diff --git a/stack.yaml.lock b/stack.yaml.lock
index d15e7706..ac8ceb24 100644
--- a/stack.yaml.lock
+++ b/stack.yaml.lock
@@ -7,41 +7,41 @@ packages:
 - completed:
     hackage: hspec-2.10.6@sha256:c90dbcc629e88e5f56021c7dba26a97109a0c441aeece6ead217ee3fc83dcb68,1712
     pantry-tree:
-      size: 583
       sha256: e61c983a62c1a72b1fe83aea65f95bba3fcde6f787dc5025090a701894c1b6ff
+      size: 583
   original:
     hackage: hspec-2.10.6@sha256:c90dbcc629e88e5f56021c7dba26a97109a0c441aeece6ead217ee3fc83dcb68,1712
 - completed:
     hackage: hspec-core-2.10.6@sha256:68a74267974fee22f4bc57b5d353391e8dc943b0d7ffaf5d47dab691765ee772,6659
     pantry-tree:
-      size: 5907
       sha256: 2c89341dd4d9ac200c3057e29be34e1c281207e04c44681093dd1e76e3ab46cc
+      size: 5907
   original:
     hackage: hspec-core-2.10.6@sha256:68a74267974fee22f4bc57b5d353391e8dc943b0d7ffaf5d47dab691765ee772,6659
 - completed:
     hackage: hspec-discover-2.10.6@sha256:df63254c5aa8c5c2b9233b0067728394936b6c9af7e3a5d3d44df78d888dcefd,2167
     pantry-tree:
-      size: 828
       sha256: 7cf0a4ca06d993fe934334a4b67ddbc54cfca2b622f795410c1889e6443401eb
+      size: 828
   original:
     hackage: hspec-discover-2.10.6@sha256:df63254c5aa8c5c2b9233b0067728394936b6c9af7e3a5d3d44df78d888dcefd,2167
 - completed:
     hackage: thread-utils-context-0.2.0.0@sha256:7863e568c7a43cd21616342d20484d4c962aaa9710619f104c6fb7ee32273940,1883
     pantry-tree:
-      size: 450
       sha256: 605ea068880ad39c96fce0d91db9f2d54553ed43dfc41c37845fade8be2e9568
+      size: 450
   original:
     hackage: thread-utils-context-0.2.0.0@sha256:7863e568c7a43cd21616342d20484d4c962aaa9710619f104c6fb7ee32273940,1883
 - completed:
     hackage: thread-utils-finalizers-0.1.0.0@sha256:a8435240bfc0ae96c94704d2986699a11a395c496f9a7f2e5f5d729a0b967549,1381
     pantry-tree:
-      size: 400
       sha256: 7f708d158d5d0e32ffe77f6375a792ceb6f92e4d8dd8b32fc69e7de962e7e518
+      size: 400
   original:
     hackage: thread-utils-finalizers-0.1.0.0@sha256:a8435240bfc0ae96c94704d2986699a11a395c496f9a7f2e5f5d729a0b967549,1381
 snapshots:
 - completed:
+    sha256: e7e57649a12f6178d1158e4b6f1f1885ed56d210ae6174385271cecc9b1ea974
     size: 617368
     url: https://raw.githubusercontent.com/commercialhaskell/stackage-snapshots/master/lts/19/2.yaml
-    sha256: e7e57649a12f6178d1158e4b6f1f1885ed56d210ae6174385271cecc9b1ea974
   original: lts-19.2
diff --git a/vendors/datadog/hs-opentelemetry-vendor-datadog.cabal b/vendors/datadog/hs-opentelemetry-vendor-datadog.cabal
new file mode 100644
index 00000000..56d298ef
--- /dev/null
+++ b/vendors/datadog/hs-opentelemetry-vendor-datadog.cabal
@@ -0,0 +1,69 @@
+cabal-version: 2.4
+
+name: hs-opentelemetry-vendor-datadog
+version: 0.0.0.0
+author: Kazuki Okamoto (岡本和樹)
+maintainer: kazuki.okamoto@herp.co.jp
+
+common common
+  build-depends: base >= 4 && < 5
+  ghc-options: -Wall
+  if impl(ghc >= 8.0)
+    ghc-options: -Wcompat
+  default-language: Haskell2010
+
+library
+  import: common
+  hs-source-dirs: src
+  exposed-modules: OpenTelemetry.Vendor.Datadog
+                   OpenTelemetry.Vendor.Datadog.Internal
+  build-depends: hs-opentelemetry-api,
+                 bytestring,
+                 primitive,
+                 text
+  ghc-options: -Wcompat
+               -Wno-name-shadowing
+  if impl(ghc >= 6.4)
+    ghc-options: -Wincomplete-record-updates
+  if impl(ghc >= 6.8)
+    ghc-options: -Wmonomorphism-restriction
+  if impl(ghc >= 7.0)
+    ghc-options: -Wmissing-import-lists
+  if impl(ghc >= 7.2)
+    ghc-options: -Wincomplete-uni-patterns
+                 -Widentities
+  if impl(ghc >= 8.0)
+    ghc-options: -Wmissing-exported-signatures
+                 -Wredundant-constraints
+  if impl(ghc >= 8.2)
+    ghc-options: -Wmissing-home-modules
+  if impl(ghc >= 8.4)
+    ghc-options: -Wmissing-export-lists
+                 -Wpartial-fields
+  if impl(ghc >= 8.8)
+    ghc-options: -Wmissing-deriving-strategies
+  if impl(ghc >= 8.10)
+    ghc-options: -Wunused-packages
+  if impl(ghc >= 9.0)
+    ghc-options: -Winvalid-haddock
+  if impl(ghc >= 9.2)
+    ghc-options: -Wmissing-kind-signatures
+                 -Woperator-whitespace
+                 -Wredundant-bang-patterns
+
+test-suite spec
+  import: common
+  type: exitcode-stdio-1.0
+  main-is: Spec.hs
+  hs-source-dirs: test/spec
+                  old-src
+  other-modules: OpenTelemetry.Vendor.DatadogSpec
+  build-depends: hs-opentelemetry-vendor-datadog,
+                 hs-opentelemetry-api,
+                 bytestring,
+                 hspec,
+                 QuickCheck
+  ghc-options: -threaded
+               -rtsopts
+               -with-rtsopts=-N
+  build-tool-depends: hspec-discover:hspec-discover
diff --git a/vendors/datadog/src/OpenTelemetry/Vendor/Datadog.hs b/vendors/datadog/src/OpenTelemetry/Vendor/Datadog.hs
new file mode 100644
index 00000000..71097385
--- /dev/null
+++ b/vendors/datadog/src/OpenTelemetry/Vendor/Datadog.hs
@@ -0,0 +1,80 @@
+{-# LANGUAGE OverloadedStrings #-}
+{-# LANGUAGE TupleSections #-}
+
+module OpenTelemetry.Vendor.Datadog (
+  -- * Trace
+  --
+  -- | These functions are conversions of the hs-opentelemetry internal representation of the trace ID and
+  -- the span ID and the Datadog header representation of them each other.
+  --
+  -- @
+  -- +----------+-----------------+----------------+
+  -- |          | Trace ID        | Span ID        |
+  -- +----------+-----------------+----------------+
+  -- | Internal | 128-bit integer | 64-bit integer |
+  -- +----------+-----------------+----------------+
+  -- | Datadog  | ASCII text of   | ASCII text of  |
+  -- | Header   | 64-bit integer  | 64-bit integer |
+  -- +----------+-----------------+----------------+
+  -- @
+  --
+  -- Reference: bi-directional conversion of IDs of Open Telemetry and ones of Datadog
+  --
+  -- - English: https://docs.datadoghq.com/tracing/other_telemetry/connect_logs_and_traces/opentelemetry/
+  -- - Japanese: https://docs.datadoghq.com/ja/tracing/connect_logs_and_traces/opentelemetry/
+  convertOpenTelemetrySpanIdToDatadogSpanId,
+  convertOpenTelemetryTraceIdToDatadogTraceId,
+
+  -- * Attribute
+  --
+  -- | These are keys to lookup or insert 'OpenTelemetry.Attributes.Attribute's to 'OpenTelemetry.Attributes.Attributes' with.
+  envKey,
+  serviceKey,
+  versionKey,
+
+  -- * Resource
+  detectResource,
+) where
+
+import qualified Data.ByteString.Short.Internal as SBI
+import Data.Primitive (ByteArray (ByteArray))
+import Data.String (fromString)
+import Data.Text (Text)
+import Data.Word (Word64)
+import qualified OpenTelemetry.Internal.Trace.Id as Trace
+import OpenTelemetry.Resource (Resource, mkResource)
+import OpenTelemetry.Vendor.Datadog.Internal (indexByteArrayNbo)
+import System.Environment (lookupEnv)
+
+
+convertOpenTelemetrySpanIdToDatadogSpanId :: Trace.SpanId -> Word64
+convertOpenTelemetrySpanIdToDatadogSpanId (Trace.SpanId (SBI.SBS a)) = indexByteArrayNbo (ByteArray a) 0
+
+
+convertOpenTelemetryTraceIdToDatadogTraceId :: Trace.TraceId -> Word64
+convertOpenTelemetryTraceIdToDatadogTraceId (Trace.TraceId (SBI.SBS a)) = indexByteArrayNbo (ByteArray a) 1
+
+
+envKey :: Text
+envKey = "dd.env"
+
+
+serviceKey :: Text
+serviceKey = "dd.service"
+
+
+versionKey :: Text
+versionKey = "dd.version"
+
+
+-- | Detect these environment variables and create a 'Resource' from them.
+--
+-- - DD_ENV
+-- - DD_SERVICE
+-- - DD_VERSION
+detectResource :: IO (Resource r)
+detectResource = do
+  env <- (envKey,) <$> lookupEnv "DD_ENV"
+  service <- (serviceKey,) <$> lookupEnv "DD_SERVICE"
+  version <- (versionKey,) <$> lookupEnv "DD_VERSION"
+  pure $ mkResource $ (\(k, mv) -> (k,) . fromString <$> mv) <$> [env, service, version]
diff --git a/vendors/datadog/src/OpenTelemetry/Vendor/Datadog/Internal.hs b/vendors/datadog/src/OpenTelemetry/Vendor/Datadog/Internal.hs
new file mode 100644
index 00000000..9695fb96
--- /dev/null
+++ b/vendors/datadog/src/OpenTelemetry/Vendor/Datadog/Internal.hs
@@ -0,0 +1,22 @@
+module OpenTelemetry.Vendor.Datadog.Internal (indexByteArrayNbo) where
+
+import Data.Bits (Bits (shift))
+import Data.Primitive.ByteArray (ByteArray (), indexByteArray)
+import Data.Word (Word64, Word8)
+
+
+-- | Read 'ByteArray' to 'Word64' with network-byte-order.
+indexByteArrayNbo ::
+  ByteArray ->
+  -- | Offset in 'Word64'-size unit
+  Int ->
+  Word64
+indexByteArrayNbo ba offset =
+  loop 0 0
+  where
+    loop 8 acc = acc
+    loop n acc = loop (n + 1) $ shift acc 8 + word8ToWord64 (indexByteArray ba $ 8 * offset + n)
+
+
+word8ToWord64 :: Word8 -> Word64
+word8ToWord64 = fromIntegral
diff --git a/propagators/datadog/test/spec/OpenTelemetry/Propagator/DatadogSpec.hs b/vendors/datadog/test/spec/OpenTelemetry/Vendor/DatadogSpec.hs
similarity index 94%
rename from propagators/datadog/test/spec/OpenTelemetry/Propagator/DatadogSpec.hs
rename to vendors/datadog/test/spec/OpenTelemetry/Vendor/DatadogSpec.hs
index 34c90e3d..6af358eb 100644
--- a/propagators/datadog/test/spec/OpenTelemetry/Propagator/DatadogSpec.hs
+++ b/vendors/datadog/test/spec/OpenTelemetry/Vendor/DatadogSpec.hs
@@ -2,12 +2,12 @@
 {-# LANGUAGE OverloadedStrings #-}
 {-# OPTIONS_GHC -Wno-type-defaults #-}
 
-module OpenTelemetry.Propagator.DatadogSpec where
+module OpenTelemetry.Vendor.DatadogSpec where
 
 import qualified Data.ByteString as B
 import qualified Data.ByteString.Short as SB
 import OpenTelemetry.Internal.Trace.Id
-import OpenTelemetry.Propagator.Datadog
+import OpenTelemetry.Vendor.Datadog
 import Test.Hspec
 import Test.QuickCheck
 
diff --git a/vendors/datadog/test/spec/Spec.hs b/vendors/datadog/test/spec/Spec.hs
new file mode 100644
index 00000000..038e7c8e
--- /dev/null
+++ b/vendors/datadog/test/spec/Spec.hs
@@ -0,0 +1,2 @@
+{-# OPTIONS_GHC -F -pgmF hspec-discover #-}
+