A2A MCP Server
Click on "Install Server".
Wait a few minutes for the server to deploy. Once ready, it will show a "Started" state.
In the chat, type
@followed by the MCP server name and your instructions, e.g., "@A2A MCP Serverdiscover agent at http://localhost:10001"
That's it! The server will respond to your query, and you can continue using it as needed.
Here is a step-by-step guide with screenshots.
A2A MCP Server
将 A2A (Agent-to-Agent) 协议暴露为 MCP tools,让 Goose 可以通过 External Subagent 机制调用远程 A2A agents。
功能
a2a_discover- 发现并注册远程 A2A agenta2a_list_agents- 列出所有已发现的 agentsa2a_send- 发送消息给 agent 并等待结果(支持轮询)a2a_get_task- 查询任务状态a2a_cancel_task- 取消运行中的任务a2a_list_tasks- 列出 agent 上的任务
Related MCP server: openclaw-tools-mcp
环境变量
变量 | 说明 | 默认值 |
| A2A Gateway URL (如 LiteLLM) |
|
| 认证 API Key | 空 |
| HTTP 请求超时 (毫秒) |
|
安装
cd a2a-mcp-server
npm install
npm run build配置 Goose External Subagent
在 ~/.config/goose/config.yaml 中添加:
extensions:
a2a-mcp-server:
type: stdio
cmd: node
args:
- /path/to/a2a-mcp-server/dist/server.js
env:
A2A_GATEWAY_URL: "http://localhost:4000"
A2A_API_KEY: "your-api-key"
timeout: 300
bundled: false
enabled: true或者使用绝对路径的 wrapper script:
#!/bin/bash
# /usr/local/bin/a2a-mcp-server
export A2A_GATEWAY_URL="http://localhost:4000"
export A2A_API_KEY="your-api-key"
exec node /path/to/a2a-mcp-server/dist/server.js然后配置:
extensions:
a2a-mcp-server:
type: stdio
cmd: /usr/local/bin/a2a-mcp-server
timeout: 300
bundled: false
enabled: true使用示例
1. 发现 Agent
使用 a2a_discover 发现 http://localhost:10001 的 agent2. 发送消息
用 a2a_send 给 my-agent 发送消息:"帮我分析这段代码的性能问题"3. 查询任务
用 a2a_get_task 查询任务 task-12345 的状态4. 列出所有 agents
用 a2a_list_agents 看看有哪些可用的 agents架构
Goose Main Agent (GUI)
│
├── LLM: Claude/GPT/etc.
│
├── External Subagent: a2a-mcp-server (stdio MCP)
│ │
│ └── A2A Client
│ │
│ └── HTTP/JSON-RPC (A2A Protocol)
│ │
│ ▼
│ LiteLLM Gateway
│ │
│ ┌───────┼───────┐
│ ▼ ▼ ▼
│ Agent1 Agent2 Agent3
│
└── 其他 extensions...与 LiteLLM 集成
如果你使用 LiteLLM 作为 A2A Gateway:
# 启动 LiteLLM
litellm --config config.yaml
# 配置 A2A MCP Server
export A2A_GATEWAY_URL="http://localhost:4000"
export A2A_API_KEY="sk-xxx"LiteLLM 会自动代理 A2A 请求到上游 agents,并提供:
认证管理
请求日志
花费追踪
负载均衡
开发
# 开发模式
npm run dev
# 编译
npm run build
# 运行
npm startLicense
MIT
Maintenance
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