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A2a

A2A MCP Server is a lightweight Python bridge that lets Claude Desktop or any MCP client talk to A2A agents. It provides three tools: register servers, list agents, and call an agent, enabling quick integration of A2A-compatible agents with zero boilerplate for rapid prototyping.

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21 stars

9 forks

Trust: 46 — Fair

Devtools

Installation

npx mcp-a2a

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Documentation

A2A MCP Server

A simple MCP server that provides Claude Desktop access to A2A protocol agents.

Developer friendly more than production ready, you can hack it to adapt to your needs and expand on whatever you need. But probably not the best idea to deploy into prod as-is.

Overview

This project was created to connect Claude Desktop with A2A (Agent-to-Agent) protocol agents, particularly those built with pcingola/a2a_min and fast-agent. It was developed as a personal project to assist with agent development and for fun.

Tools

The server provides three MCP tools:

a2a_server_registry - Register or remove A2A servers

{
  "action": "add", 
  "name": "security_audit", 
  "url": "http://localhost:8000"
}

list_agents - List all registered agents with their capabilities
```
{}
```

call_agent - Send a prompt to an agent and get its response

{
  "agent_name": "security_audit",
  "prompt": "regismesquita/DevControlMCP"
}

Workflow

The typical workflow is:

Register an A2A server with a2a_server_registry
List available agents with list_agents
Call an agent with call_agent whenever needed

Local Testing

This server has been tested locally with a security audit agent built on fast-agent and a2a_min. It successfully enables Claude Desktop to communicate with A2A agents.

Purpose

This bridge allows Claude Desktop to interact with any A2A-compatible agent, extending Claude's capabilities through the MCP tools interface.

A2a