diff --git a/prism-agent/service/server/src/main/scala/io/iohk/atala/agent/server/http/model/OASErrorModelHelper.scala b/prism-agent/service/server/src/main/scala/io/iohk/atala/agent/server/http/model/OASErrorModelHelper.scala
index c5aa0ad98e..42a0076f5b 100644
--- a/prism-agent/service/server/src/main/scala/io/iohk/atala/agent/server/http/model/OASErrorModelHelper.scala
+++ b/prism-agent/service/server/src/main/scala/io/iohk/atala/agent/server/http/model/OASErrorModelHelper.scala
@@ -2,7 +2,7 @@ package io.iohk.atala.agent.server.http.model
 
 import akka.http.scaladsl.server.StandardRoute
 import io.iohk.atala.agent.openapi.model.ErrorResponse
-import io.iohk.atala.agent.walletapi.model.error.{CreateManagedDIDError, PublishManagedDIDError}
+import io.iohk.atala.agent.walletapi.model.error.{CreateManagedDIDError, ListManagedDIDError, PublishManagedDIDError}
 import io.iohk.atala.castor.core.model.did.w3c.DIDResolutionErrorRepr
 import io.iohk.atala.castor.core.model.error.{DIDOperationError, DIDResolutionError}
 
@@ -44,6 +44,18 @@ trait OASErrorModelHelper {
     }
   }
 
+  given ToErrorResponse[ListManagedDIDError] with {
+    override def toErrorResponse(e: ListManagedDIDError): ErrorResponse = {
+      ErrorResponse(
+        `type` = "error-type",
+        title = "error-title",
+        status = 500,
+        detail = Some(e.toString),
+        instance = "error-instance"
+      )
+    }
+  }
+
   given ToErrorResponse[PublishManagedDIDError] with {
     override def toErrorResponse(e: PublishManagedDIDError): ErrorResponse = {
       ErrorResponse(
diff --git a/prism-agent/service/server/src/main/scala/io/iohk/atala/agent/server/http/service/DIDRegistrarApiServiceImpl.scala b/prism-agent/service/server/src/main/scala/io/iohk/atala/agent/server/http/service/DIDRegistrarApiServiceImpl.scala
index 53775b49e2..d07c2f3e65 100644
--- a/prism-agent/service/server/src/main/scala/io/iohk/atala/agent/server/http/service/DIDRegistrarApiServiceImpl.scala
+++ b/prism-agent/service/server/src/main/scala/io/iohk/atala/agent/server/http/service/DIDRegistrarApiServiceImpl.scala
@@ -42,10 +42,12 @@ class DIDRegistrarApiServiceImpl(service: ManagedDIDService)(using runtime: Runt
       toEntityMarshallerListManagedDIDResponseInnerarray: ToEntityMarshaller[Seq[ListManagedDIDResponseInner]],
       toEntityMarshallerErrorResponse: ToEntityMarshaller[ErrorResponse]
   ): Route = {
-    val result = service.listManagedDID.map(_.map(_.toOAS))
+    val result = service.listManagedDID
+      .map(_.map(_.toOAS))
+      .mapError(HttpServiceError.DomainError.apply)
 
-    onZioSuccess(result.either) {
-      case Left(error)   => ??? // TODO: implement error handling
+    onZioSuccess(result.mapError(_.toOAS).either) {
+      case Left(error)   => complete(error.status -> error)
       case Right(result) => listManagedDid200(result)
     }
   }