diff --git a/server/src/sms/reply.ts b/server/src/sms/reply.ts
index 88e6fe0..7e535ac 100644
--- a/server/src/sms/reply.ts
+++ b/server/src/sms/reply.ts
@@ -90,6 +90,7 @@ export async function sendSms(to: string, from: string, body: string): Promise<v
       event: 'sms.send_error',
       error: error.message,
       status: error.response?.status,
+      responseData: error.response?.data,
     }, 'SMS send error');
   }
 }