A2A MCP Server
MCP (Model Context Protocol) server for interacting with Agent-to-Agent (A2A) protocol compliant agents.
Overview
This MCP server enables LLMs to communicate with A2A-compliant agents through the Agent-to-Agent protocol. It provides tools for sending messages, managing tasks, and retrieving agent information.
Features
- a2a_send_message: Send messages to A2A agents and optionally continue existing conversations
- a2a_get_task: Retrieve task status and details by task ID
- a2a_cancel_task: Cancel a running task
- a2a_get_agent_card: Fetch agent metadata and capabilities
Installation
npm install
npm run buildUsage
The server communicates via stdio and can be configured in your MCP client:
{
"mcpServers": {
"a2a": {
"command": "node",
"args": ["/path/to/a2a-mcp-server/dist/index.js"]
}
}
}Tools
a2a_send_message
Send a message to an A2A agent.
Parameters:
agentCardUrl(string, required): URL to the agent's card endpointmessage(string, required): The message text to sendtaskId(string, optional): Existing task ID to continue conversation
Example: ``typescript { "agentCardUrl": "https://example.com/.well-known/agent-card.json", "message": "Hello, what can you do?", "taskId": "optional-task-id-to-continue" } ``
a2a_get_task
Retrieve the status and details of a task.
Parameters:
agentCardUrl(string, required): URL to the agent's card endpointtaskId(string, required): The task ID to retrieve
a2a_cancel_task
Cancel a running task.
Parameters:
agentCardUrl(string, required): URL to the agent's card endpointtaskId(string, required): The task ID to cancel
a2a_get_agent_card
Retrieve an agent's card with metadata and capabilities.
Parameters:
agentCardUrl(string, required): URL to the agent's card endpoint
Development
# Install dependencies
npm install
# Run in development mode with auto-reload
npm run dev
# Build for production
npm run build
# Run the built server
npm startLicense
MIT
