---
title: "Send a message to the accounting agent"
method: POST
path: "/messages"
tags: ["Messages"]
---

# Send a message to the accounting agent

`POST /messages`

Posts a message to Björn. The message is dispatched as an event to the agent runtime; the returned `event_id` identifies that dispatch. Requires a write-scoped key.

## Request body

- object
  - `text` string, required — The message text.
  - `customer_id` string — Target company. Optional for API keys.
  - `context` object — Optional structured context attached to the message.
  - `source` string — Message source label.

## Response `200`

Message accepted and dispatched.

- object
  - `event_id` string
  - `message` ChatMessage — One message in the conversation with the accounting agent.

## Other responses

- `401` — Missing or invalid bearer token.
- `403` — Insufficient scope or role — e.g. a read-scoped key on a mutating method, or an API key on an admin/approver-only endpoint.

---

[API](https://skmtc.net/lastaccountingcompany/apis/lac-customer-api.md) · [All operations](https://skmtc.net/lastaccountingcompany/apis/lac-customer-api/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/lastaccountingcompany/lac-customer-api/revisions/52e277b4f031/schema)