---
title: "A2A Message"
method: POST
path: "/a2a/message"
---

# A2A Message

`POST /a2a/message`

Receive an inbound A2A message and inject it into the target task context.

## Request body

- A2AMessageRequest — Body for POST /a2a/message.
  - `sender` string, required
  - `recipient` string, required
  - `content` string, required
  - `task_id` string, required

## Response `201`

Successful Response

- A2AMessageResponse — Serialized A2A message returned by Bernstein endpoints.
  - `id` string, required
  - `sender` string, required
  - `recipient` string, required
  - `content` string, required
  - `task_id` string, required
  - `direction` string, required
  - `delivered` boolean, required
  - `external_endpoint` string, nullable, required
  - `created_at` number, required

## Other responses

- `404` — Task not found
- `422` — Validation Error

---

[API](https://skmtc.net/sipyourdrink-ltd/apis/bernstein-task-server.md) · [All operations](https://skmtc.net/sipyourdrink-ltd/apis/bernstein-task-server/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/sipyourdrink-ltd/bernstein-task-server/versions/86f514b4e920/schema)