# POST /api/v1/inboxes/:id/chat/messages

Auth: Bearer

HTML: https://cooperemail.com/docs/reference/post-chat-message

## Summary

Post an agent message to the verified owner. text is 1 to 16000 characters. client_id returns the same message. Requires task_reply.

## Request

```json
{
  "text": "Tuesday works."
}
```

## Response

The OpenAPI document does not declare a JSON response schema for this call. The summary is the contract.

## Errors

The summary and the OpenAPI operation do not name an error code.

## Idempotency

client_id makes this write idempotent. Sending the same client_id again returns the original object instead of creating a duplicate.