---
title: "Changes to Send a webchat message"
method: POST
path: "/api/v1/chat"
---

# Changes to Send a webchat message

`POST /api/v1/chat`

> Every recorded change to this endpoint, newest first.

## Timeline

Changed in 3 of 13 revisions.

- **2026-07-18** `dcaea15b7823` — 3 info
- **2026-06-14** `6b73b947caab` — 1 breaking, 3 warning, 16 info
- **2026-03-09** `3d43cee2622a` — 4 breaking, 6 warning, 10 info

## Changes

- **2026-07-18** `dcaea15b7823` — 3 info
  - added the new optional request property `flags`
  - added the new optional request property `message/oneOf[subschema #2]/items/stored_filename`
  - request property `enable_streaming` deprecated
- **2026-06-14** `6b73b947caab` — 1 breaking, 3 warning, 16 info
  - removed the media type `text/event-stream` for the response with the status `200`
  - removed the request property `message/oneOf[subschema #2]/items/message_id`
  - removed the request property `message/oneOf[subschema #2]/items/path`
  - removed the request property `message/oneOf[subschema #2]/items/selected_text`
  - api operation id `sendChatMessage` was added
  - the endpoint scheme security `ApiKeyHeader` was removed from the API
  - api tag `Chat` added
  - api tag `Open API` removed
  - added the new optional request property `_llm_checkpoint_id`
  - added the new optional request property `_platform_history_id`
  - added the new optional request property `_skip_user_history`
  - added the new optional request property `_thread_selected_text`
  - added the new optional request property `message/oneOf[subschema #2]/items/mime_type`
  - added the new optional request property `message/oneOf[subschema #2]/items/url`
  - the request property `username` became optional
  - added the new `audio` enum value to the request property `message/oneOf[subschema #2]/items/type`
  - added the new `text` enum value to the request property `message/oneOf[subschema #2]/items/type`
  - added the media type `application/json` for the response with the status `200`
  - removed the non-success response with the status `401`
  - removed the non-success response with the status `403`
- **2026-03-09** `3d43cee2622a` — 4 breaking, 6 warning, 10 info
  - the request property `username` became required
  - removed the enum value `audio` of the request property `message/oneOf[subschema #2]/items/type`
  - removed the enum value `text` of the request property `message/oneOf[subschema #2]/items/type`
  - removed the media type `application/json` for the response with the status `200`
  - removed the request property `_llm_checkpoint_id`
  - removed the request property `_platform_history_id`
  - removed the request property `_skip_user_history`
  - removed the request property `_thread_selected_text`
  - removed the request property `message/oneOf[subschema #2]/items/mime_type`
  - removed the request property `message/oneOf[subschema #2]/items/url`
  - api operation id `sendChatMessage` removed and replaced with ``
  - the endpoint scheme security `ApiKeyHeader` was added to the API
  - api tag `Open API` added
  - api tag `Chat` removed
  - added the new optional request property `message/oneOf[subschema #2]/items/message_id`
  - added the new optional request property `message/oneOf[subschema #2]/items/path`
  - added the new optional request property `message/oneOf[subschema #2]/items/selected_text`
  - added the media type `text/event-stream` for the response with the status `200`
  - added the non-success response with the status `401`
  - added the non-success response with the status `403`

---

[Operation](https://skmtc.dev/astrbotdevs/apis/astrbot-openapi-v1/docs/api/v1/chat/post.md) · [API](https://skmtc.dev/astrbotdevs/apis/astrbot-openapi-v1.md) · [Page](https://skmtc.dev/astrbotdevs/apis/astrbot-openapi-v1/changes/api/v1/chat/post)