diff --git a/services/identity/src/database/device_list.rs b/services/identity/src/database/device_list.rs
--- a/services/identity/src/database/device_list.rs
+++ b/services/identity/src/database/device_list.rs
@@ -556,6 +556,58 @@
     Ok(item.is_some())
   }
 
+  pub async fn get_device_data(
+    &self,
+    user_id: impl Into<String>,
+    device_id: impl Into<String>,
+  ) -> Result<Option<DeviceRow>, Error> {
+    let GetItemOutput { item, .. } = self
+      .client
+      .get_item()
+      .table_name(devices_table::NAME)
+      .key(ATTR_USER_ID, AttributeValue::S(user_id.into()))
+      .key(ATTR_ITEM_ID, DeviceIDAttribute(device_id.into()).into())
+      .send()
+      .await
+      .map_err(|e| {
+        error!("Failed to fetch device data: {:?}", e);
+        Error::AwsSdk(e.into())
+      })?;
+
+    let Some(attrs) = item else {
+      return Ok(None);
+    };
+
+    let device_data = DeviceRow::try_from(attrs)?;
+    Ok(Some(device_data))
+  }
+
+  /// Fails if the device list is empty
+  pub async fn get_primary_device_data(
+    &self,
+    user_id: &str,
+  ) -> Result<DeviceRow, Error> {
+    let device_list = self.get_current_device_list(user_id).await?;
+    let Some(primary_device_id) = device_list
+      .as_ref()
+      .and_then(|list| list.device_ids.first())
+    else {
+      error!(user_id, "Device list is empty. Cannot fetch primary device");
+      return Err(Error::DeviceList(DeviceListError::DeviceNotFound));
+    };
+
+    self
+      .get_device_data(user_id, primary_device_id)
+      .await?
+      .ok_or_else(|| {
+        error!(
+          "Corrupt database. Missing primary device data for user {}",
+          user_id
+        );
+        Error::MissingItem
+      })
+  }
+
   /// Required only for migration purposes (determining primary device)
   pub async fn update_device_login_time(
     &self,
diff --git a/services/identity/src/grpc_services/authenticated.rs b/services/identity/src/grpc_services/authenticated.rs
--- a/services/identity/src/grpc_services/authenticated.rs
+++ b/services/identity/src/grpc_services/authenticated.rs
@@ -201,14 +201,21 @@
       .ok_or_else(|| tonic::Status::not_found("user not found"))?;
 
     let identity_info = IdentityInfo::try_from(identifier)?;
-
     let identity = Some(Identity {
       identity_info: Some(identity_info),
     });
 
+    let primary_device_data = self
+      .db_client
+      .get_primary_device_data(&message.user_id)
+      .await
+      .map_err(handle_db_error)?;
+    let primary_device_keys = primary_device_data.device_key_info;
+
     let response = Response::new(KeyserverKeysResponse {
       keyserver_info,
       identity,
+      primary_device_identity_info: Some(primary_device_keys.into()),
     });
 
     return Ok(response);
diff --git a/shared/protos/identity_auth.proto b/shared/protos/identity_auth.proto
--- a/shared/protos/identity_auth.proto
+++ b/shared/protos/identity_auth.proto
@@ -109,6 +109,7 @@
 message KeyserverKeysResponse {
   optional OutboundKeyInfo keyserver_info = 1;
   Identity identity = 2;
+  identity.unauth.IdentityKeyInfo primary_device_identity_info = 3;
 }
 
 // GetOutboundKeysForUser
diff --git a/web/protobufs/identity-auth-structs.cjs b/web/protobufs/identity-auth-structs.cjs
--- a/web/protobufs/identity-auth-structs.cjs
+++ b/web/protobufs/identity-auth-structs.cjs
@@ -1617,7 +1617,8 @@
 proto.identity.auth.KeyserverKeysResponse.toObject = function(includeInstance, msg) {
   var f, obj = {
     keyserverInfo: (f = msg.getKeyserverInfo()) && proto.identity.auth.OutboundKeyInfo.toObject(includeInstance, f),
-    identity: (f = msg.getIdentity()) && proto.identity.auth.Identity.toObject(includeInstance, f)
+    identity: (f = msg.getIdentity()) && proto.identity.auth.Identity.toObject(includeInstance, f),
+    primaryDeviceIdentityInfo: (f = msg.getPrimaryDeviceIdentityInfo()) && identity_unauth_pb.IdentityKeyInfo.toObject(includeInstance, f)
   };
 
   if (includeInstance) {
@@ -1664,6 +1665,11 @@
       reader.readMessage(value,proto.identity.auth.Identity.deserializeBinaryFromReader);
       msg.setIdentity(value);
       break;
+    case 3:
+      var value = new identity_unauth_pb.IdentityKeyInfo;
+      reader.readMessage(value,identity_unauth_pb.IdentityKeyInfo.deserializeBinaryFromReader);
+      msg.setPrimaryDeviceIdentityInfo(value);
+      break;
     default:
       reader.skipField();
       break;
@@ -1709,6 +1715,14 @@
       proto.identity.auth.Identity.serializeBinaryToWriter
     );
   }
+  f = message.getPrimaryDeviceIdentityInfo();
+  if (f != null) {
+    writer.writeMessage(
+      3,
+      f,
+      identity_unauth_pb.IdentityKeyInfo.serializeBinaryToWriter
+    );
+  }
 };
 
 
@@ -1786,6 +1800,43 @@
 };
 
 
+/**
+ * optional identity.unauth.IdentityKeyInfo primary_device_identity_info = 3;
+ * @return {?proto.identity.unauth.IdentityKeyInfo}
+ */
+proto.identity.auth.KeyserverKeysResponse.prototype.getPrimaryDeviceIdentityInfo = function() {
+  return /** @type{?proto.identity.unauth.IdentityKeyInfo} */ (
+    jspb.Message.getWrapperField(this, identity_unauth_pb.IdentityKeyInfo, 3));
+};
+
+
+/**
+ * @param {?proto.identity.unauth.IdentityKeyInfo|undefined} value
+ * @return {!proto.identity.auth.KeyserverKeysResponse} returns this
+*/
+proto.identity.auth.KeyserverKeysResponse.prototype.setPrimaryDeviceIdentityInfo = function(value) {
+  return jspb.Message.setWrapperField(this, 3, value);
+};
+
+
+/**
+ * Clears the message field making it undefined.
+ * @return {!proto.identity.auth.KeyserverKeysResponse} returns this
+ */
+proto.identity.auth.KeyserverKeysResponse.prototype.clearPrimaryDeviceIdentityInfo = function() {
+  return this.setPrimaryDeviceIdentityInfo(undefined);
+};
+
+
+/**
+ * Returns whether this field is set.
+ * @return {boolean}
+ */
+proto.identity.auth.KeyserverKeysResponse.prototype.hasPrimaryDeviceIdentityInfo = function() {
+  return jspb.Message.getField(this, 3) != null;
+};
+
+
 
 
 
diff --git a/web/protobufs/identity-auth-structs.cjs.flow b/web/protobufs/identity-auth-structs.cjs.flow
--- a/web/protobufs/identity-auth-structs.cjs.flow
+++ b/web/protobufs/identity-auth-structs.cjs.flow
@@ -156,6 +156,11 @@
   hasIdentity(): boolean;
   clearIdentity(): KeyserverKeysResponse;
 
+  getPrimaryDeviceIdentityInfo(): identityStructs.IdentityKeyInfo | void;
+  setPrimaryDeviceIdentityInfo(value?: identityStructs.IdentityKeyInfo): KeyserverKeysResponse;
+  hasPrimaryDeviceIdentityInfo(): boolean;
+  clearPrimaryDeviceIdentityInfo(): KeyserverKeysResponse;
+
   serializeBinary(): Uint8Array;
   toObject(includeInstance?: boolean): KeyserverKeysResponseObject;
   static toObject(includeInstance: boolean, msg: KeyserverKeysResponse): KeyserverKeysResponseObject;
@@ -167,6 +172,7 @@
 export type KeyserverKeysResponseObject = {
   keyserverInfo?: OutboundKeyInfoObject,
   identity: ?IdentityObject,
+  primaryDeviceIdentityInfo: ?identityStructs.IdentityKeyInfoObject,
 };
 
 declare export class OutboundKeysForUserResponse extends Message {