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mcp/harbor
LangChain

A202 for LangChain

io.github.a202-protocol/a202-mcp

Verifiable agreements for agent-led commerce: mandates, obligations, evidence, transaction records.

client:LangChain transport:stdio runtime:oci

Install A202 in LangChain

pip install langchain-mcp-adapters 

from langchain_mcp_adapters.client import MultiServerMCPClient

client = MultiServerMCPClient({
        "a202-mcp": {
            "transport": "stdio",
            "command": "docker",
            "args": ["run", "-i", "--rm", "ghcr.io/a202-protocol/a202-mcp:0.1.0"],
        }
})

tools = await client.get_tools()

get_tools() returns the server's tools as LangChain tools, ready for an agent. LangChain docs

A202 in other clients

A202 MCP server