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MCP server · Developer Tools

A2a

by · github.com/regismesquita/MCP_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.

Unclaimed last commit a year ago devtools
InstallView source
46Fair

Scored 5 months ago · breakdown

About A2a

A2a is an MCP server published by regismesquita in the Developer Tools category: 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.

The repository has 22 stars and 10 forks, with the last commit a year ago. Six months or more without a commit doesn't mean the server is broken, but check the open issues before depending on it in production.

Install

From source
git clone https://github.com/regismesquita/MCP_A2A

This server has no ConduID identity, so agent calls to it are not receipted. Pin the version you install and review the source before granting it credentials.

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Security checks

Static checks derived from the repository 7 days ago. Heuristics on the source, not an audit.

  • ✓README presentThe repository ships documentation.
  • !License declaredNo license file. Legally you have no right to use it in a product.
  • !Tests presentNo tests found. Behaviour changes may go unnoticed between versions.
  • !Dependencies pinnedNo lockfile. Installs can pull different code over time.
  • ✓No dynamic code executionSource scan found no eval, dynamic Function, or shell execution.
  • !Scoped permissionsDoesn't declare a permission scope. Assume it can do anything its process can.

README

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:

  1. a2a_server_registry - Register or remove A2A servers

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

  2. list_agents - List all registered agents with their capabilities

    {}

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

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

Workflow

The typical workflow is:

  1. Register an A2A server with a2a_server_registry
  2. List available agents with list_agents
  3. 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.

Screenshot

README fetched from the repository 7 days ago. The original is authoritative.

Questions

About A2a

How do I install A2a?

No package has been published for this server, so install it from source: clone the repository and follow its README.

Is A2a safe to use with an AI agent?

Its trust score is 46 out of 100 (fair). It passes 2 of the 6 static security checks run so far; the failures are listed above. It has no ConduID identity yet, so agent calls to it are not receipted.

Is A2a still maintained?

The last commit was a year ago and 3 open issues. That's long enough that you should check whether the maintainer is responding to issues before depending on it.