---
title: 1001: Missing required field | API Docs
description: A required field is missing from the request body or query parameters.
---

A required field is missing from the request body or query parameters. This is an HTTP 400 error indicating the request cannot be processed as-is.

## Troubleshooting

- Check the API docs for the required fields on the endpoint you are calling
- Use an [official SDK](/getting-started/sdks/index.md) which enforces required fields at compile time

## Related

- [Sending messages](/guides/messaging/sending-messages/index.md)
- [API reference: Chats](/api/resources/chats/index.md)
- [SDKs](/getting-started/sdks/index.md)