---
title: "Send a compliance message into the caller's group (business)"
method: POST
path: "/compliance/messages"
tags: ["compliance", "messages"]
---

# Send a compliance message into the caller's group (business)

`POST /compliance/messages`

Business-authored chat message into the authenticated group.

## Request body

- MessagesSendBusinessInput
  - `body` string
  - `content_docs` MessagesSendInputContent[]
    - `document_id` string, required
    - `file_contents_b64` string, required
    - `file_name` string, required
    - `file_size` integer
    - `file_type` string
  - `message_id` string, required

## Response `200`

OK

- MessagesAck
  - `ok` boolean

## Other responses

- `400` — Bad Request
- `401` — Unauthorized
- `403` — Forbidden
- `default` — Error response.

## Changes

- **2026-09-01** `f2d9f80610d9` — 4 info
  - added the optional property `error/api_client_id` to the response with the `400` status
  - added the optional property `error/api_client_id` to the response with the `401` status
  - added the optional property `error/api_client_id` to the response with the `403` status
  - added the optional property `error/api_client_id` to the response with the `default` status
- **2026-08-06** `fe2041c5ba86` — 2 warning
  - changed the pattern of the request property `content_docs/items/document_id` from `^doc_[0-9a-hjkmnp-tv-z]{26}$` to `^doc_[0-7][0-9a-hjkmnp-tv-z]{25}$`
  - changed the pattern of the request property `message_id` from `^msg_[0-9a-hjkmnp-tv-z]{26}$` to `^msg_[0-7][0-9a-hjkmnp-tv-z]{25}$`

[Change history](https://skmtc.dev/stablesea/apis/stable-sea-backend/changes/compliance/messages/post.md)

---

[API](https://skmtc.dev/stablesea/apis/stable-sea-backend.md) · [All operations](https://skmtc.dev/stablesea/apis/stable-sea-backend/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/stablesea/stable-sea-backend/revisions/f2d9f80610d9/schema)