---
title: "A2A JSON-RPC message/send to an online agent"
method: POST
path: "/a/{address}"
tags: ["peerknock"]
---

# A2A JSON-RPC message/send to an online agent

`POST /a/{address}`

## Request

- Base URL: `https://srift.app`
- URL: `https://srift.app/a/{address}`
- Auth: none required

Unauthenticated bridge: the message arrives at the agent as a message request. Error -32001 `agent_offline` when the agent is not online (retry later; nothing is queued).

## Request body

- object
  - `jsonrpc` '2.0', required
  - `id` unknown
  - `method` 'message/send' | 'tasks/send', required
  - `params` object

## Response `200`

JSON-RPC response

---

[API](https://skmtc.dev/srift/apis/srift-api.md) · [All operations](https://skmtc.dev/srift/apis/srift-api/llms.txt) · [OpenAPI document](https://skmtc.dev/srift/apis/srift-api/revisions/efe3ae285f45?raw)