diff --git a/apps/api/src/hooks/client.hook.ts b/apps/api/src/hooks/client.hook.ts
index 4ec5ced2..42aaac98 100644
--- a/apps/api/src/hooks/client.hook.ts
+++ b/apps/api/src/hooks/client.hook.ts
@@ -1,17 +1,23 @@
 import { SdkAuthError, validateSdkRequest } from '@/utils/auth';
+import type { PostEventPayload, TrackHandlerPayload } from '@openpanel/sdk';
 import type { FastifyReply, FastifyRequest } from 'fastify';
 
-export async function clientHook(req: FastifyRequest, reply: FastifyReply) {
+export async function clientHook(
+  req: FastifyRequest<{
+    Body: PostEventPayload | TrackHandlerPayload;
+  }>,
+  reply: FastifyReply,
+) {
   try {
     const client = await validateSdkRequest(req);
     req.client = client;
   } catch (error) {
     if (error instanceof SdkAuthError) {
-      req.log.warn(error, 'Invalid SDK request');
+      req.log.warn('Invalid SDK request', error);
       return reply.status(401).send(error.message);
     }
 
-    req.log.error(error, 'Invalid SDK request');
+    req.log.error('Invalid SDK request', error);
     return reply.status(500).send('Internal server error');
   }
 }
diff --git a/apps/api/src/utils/auth.ts b/apps/api/src/utils/auth.ts
index 606abb1b..26f0b608 100644
--- a/apps/api/src/utils/auth.ts
+++ b/apps/api/src/utils/auth.ts
@@ -38,6 +38,7 @@ export class SdkAuthError extends Error {
   ) {
     super(message);
     this.name = 'SdkAuthError';
+    this.message = message;
     this.payload = payload;
   }
 }