---
title: 4003: Webhook delivery failed | API Docs
description: Failed to deliver webhook to your endpoint.
---

Failed to deliver webhook to your endpoint. This is an HTTP 500 error indicating the server was unable to reach your webhook URL.

## Troubleshooting

- Ensure your endpoint is publicly reachable
- Ensure your endpoint returns a 2xx status code within 10 seconds

## Related

- [Webhooks](/guides/webhooks/index.md)
- [API reference: Webhook subscriptions](/api/resources/webhook_subscriptions/index.md)
- [Debugging](/guides/platform/debugging/index.md)