Agent harnesses

Connect LangGraph

LangChain · MIT

SupportedAPI key

Graph-based agent orchestration — langchain-mcp-adapters turns every MCP tool into a LangChain tool.

Repository

1 · Choose the MCPs to connect

2 · How should it authenticate?

The config uses a mk_… placeholder — mint your key from MCP Access & keys and paste it in locally. Keys are revocable instantly.

3 · Python — langchain-mcp-adapters

from langchain_mcp_adapters.client import MultiServerMCPClient

client = MultiServerMCPClient({
    "deepinsights_mospi": {
        "transport": "streamable_http",
        "url": "https://marketplace-gateway-pef65a33ta-el.a.run.app/mospi/mcp",
        "headers": {"Authorization": "Bearer mk_…"},
    },
})
tools = await client.get_tools()
  1. 1.Replace mk_… with your personal API key.

4 · Create it as an app

Save this harness + MCP setup to your account. You get a workbench with a live test chat over the combined tool surface — the exact gateway endpoints, auth and tools LangGraph will use, metered to your own quota.

Sign in to create an app

5 · Or test each MCP on its own

Each playground's Chat and Tools pages exercise exactly the tools your harness will see — same servers, same gateway. Verify a query there first, then run it from LangGraph.

MoSPI (eSankhyiki)
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