---
title: "Send an A2A 1.0 JSON-RPC request"
method: POST
path: "/a2a"
tags: ["Agents"]
---

# Send an A2A 1.0 JSON-RPC request

`POST /a2a`

## Request

- Base URL: `https://api.temp.md`
- URL: `https://api.temp.md/a2a`
- Auth: none declared
- TypeScript: <https://skmtc.dev/temp-md/apis/temp-md-public-api/docs/a2a/post.ts> (a function with typed inputs; its response is checked against the schema)

Supports SendMessage, GetTask, ListTasks, and CancelTask. Publish and update operations accept the same 20-file, 10 MiB inline bundle shape as remote MCP.

## Headers

- `A2A-Version` '1.0'

## Request body

- JsonRpcRequest
  - `jsonrpc` '2.0', required
  - `id` union
    - string
    - integer
  - `method` 'SendMessage' | 'GetTask' | 'ListTasks' | 'CancelTask', required
  - `params` object, required

## Response `200`

A2A JSON-RPC response

- JsonRpcResponse
  - `jsonrpc` '2.0', required
  - `id` union, required
    - string
    - integer
  - `result` unknown
  - `error` object
    - `code` integer, required
    - `message` string, required
    - `data` unknown

## Other responses

- `413`: Request or bundle exceeds an enforced limit
- `415`: Invalid request

---

[API](https://skmtc.dev/temp-md/apis/temp-md-public-api.md) - [All operations](https://skmtc.dev/temp-md/apis/temp-md-public-api/llms.txt) - [OpenAPI document](https://skmtc.dev/temp-md/apis/temp-md-public-api/revisions/4753682e1e3a?raw)