---
title: 1003: Invalid request body | API Docs
description: The request body is malformed or invalid JSON.
---

The request body is malformed or invalid JSON. This is an HTTP 400 error indicating the server could not parse your request.

## Troubleshooting

- Validate your JSON syntax using a linter or validator
- Set the `Content-Type` header to `application/json`

## Related

- [Sending messages](/guides/messaging/sending-messages/index.md)
- [Debugging](/guides/platform/debugging/index.md)
- [SDKs](/getting-started/sdks/index.md)