---
title: "Send a test message"
method: POST
path: "/v1/accounts/{accountId}/business-agent/test-messages"
tags: ["Business Agent"]
---

# Send a test message

`POST /v1/accounts/{accountId}/business-agent/test-messages`

Runs the message through the full agent pipeline in Meta sandbox with no WhatsApp user and no token billing. Pass back `conversationId` to continue a thread. Meta rate-limits it per number per hour.

## Path parameters

- `accountId` string, required

## Request body

- object
  - `message` string, required
  - `conversationId` string

## Response `200`

Agent reply

- BusinessAgentTestMessageResponse
  - `message_id` string, required
  - `agent_response` string, required
  - `conversation_id` string, required — Pass it back as conversationId to continue the thread.
  - `timestamp` integer — Unix seconds.
  - `handoff_reason` string
  - `no_response_reason` string
  - `quick_replies` string[]
  - `product_variant_ids` string[]

## Other responses

- `400` — Invalid request
- `401` — Unauthorized
- `403` — Inbox add-on required, the WhatsApp token lacks the Business Agent permissions (code reconnect_required), or the merchant has not accepted the Meta Business Agent terms in WhatsApp Manager (code business_agent_terms_not_accepted).
- `404` — Account not found, or no agent exists on the number yet or the referenced item does not exist (code business_agent_not_found).
- `429` — Meta hourly test-message limit reached (code rate_limited, Retry-After when known).

## Changes

- **2026-09-16** `3e6ddf2a99ea` — 3 info
  - added the optional property `details/budgetScope` to the response with the `400` status
  - added the optional property `details/budgetScope` to the response with the `403` status
  - added the optional property `details/budgetScope` to the response with the `404` status
- **2026-09-15** `0dba7d004d75` — 6 info
  - added the optional property `details/quotaExhausted` to the response with the `400` status
  - added the optional property `details/quotaExhausted` to the response with the `403` status
  - added the optional property `details/quotaExhausted` to the response with the `404` status
  - added the optional property `details/quotaScope` to the response with the `400` status
  - …2 more
- **2026-09-09** `41eff0cffb2d` — 1 info
  - endpoint added

[Change history](https://skmtc.dev/zernio/apis/zernio-api/changes/v1/accounts/:accountId/business-agent/test-messages/post.md)

---

[API](https://skmtc.dev/zernio/apis/zernio-api.md) · [All operations](https://skmtc.dev/zernio/apis/zernio-api/llms.txt) · [OpenAPI document](https://skmtc.dev/zernio/apis/zernio-api/revisions/eded32b62823?raw)