diff --git a/packages/backend/src/server/api/ApiCallService.ts b/packages/backend/src/server/api/ApiCallService.ts
index 6399f69308..d62094dd5e 100644
--- a/packages/backend/src/server/api/ApiCallService.ts
+++ b/packages/backend/src/server/api/ApiCallService.ts
@@ -65,6 +65,8 @@ export class ApiCallService implements OnApplicationShutdown {
 	}
 
 	#sendApiError(reply: FastifyReply, err: ApiError): void {
+		this.logger.error(err);
+
 		let statusCode = err.httpStatusCode;
 		if (err.httpStatusCode === 401) {
 			reply.header('WWW-Authenticate', 'Bearer realm="Misskey"');
diff --git a/packages/backend/src/server/api/ApiServerService.ts b/packages/backend/src/server/api/ApiServerService.ts
index 32818003ad..7ce3247355 100644
--- a/packages/backend/src/server/api/ApiServerService.ts
+++ b/packages/backend/src/server/api/ApiServerService.ts
@@ -62,6 +62,15 @@ export class ApiServerService {
 			done();
 		});
 
+		fastify.addHook('onSend', (request, reply, payload, next) => {
+			console.log('---- Request:', request.method, request.url);
+			console.log('---- body:', request.body);
+
+			console.log('---- Response:', reply.statusCode);
+			console.log('---- Response:', payload);
+			next();
+		});
+
 		for (const endpoint of endpoints) {
 			const ep = {
 				name: endpoint.name,