---
title: "Handle a minimal A2A message/send request"
method: POST
path: "/v1/agent/a2a"
tags: ["Agent Commerce"]
---

# Handle a minimal A2A message/send request

`POST /v1/agent/a2a`

## Request

- Base URL: `https://fieldrobin.com/api`
- URL: `https://fieldrobin.com/api/v1/agent/a2a`
- Auth: none required

## Headers

- `Idempotency-Key` string

## Request body

- object
  - `jsonrpc` '2.0', required
  - `id` union, required
    - string
    - integer
  - `method` 'message/send', required

## Response `200`

JSON-RPC task response

- object

## Other responses

- `400`: Invalid Idempotency-Key header or JSON-RPC request

---

[API](https://skmtc.dev/fieldrobin/apis/fieldrobin-public-api.md) · [All operations](https://skmtc.dev/fieldrobin/apis/fieldrobin-public-api/llms.txt) · [OpenAPI document](https://skmtc.dev/fieldrobin/apis/fieldrobin-public-api/revisions/d492fc0a1c05?raw)