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mcp/harbor
LangChain

x402 api for LangChain

io.github.fernsugi/x402-api

DeFi data API for AI agents — pay-per-call via x402/USDC on Base

client:LangChain transport:stdio runtime:npm

Install x402 api in LangChain

pip install langchain-mcp-adapters 

from langchain_mcp_adapters.client import MultiServerMCPClient

client = MultiServerMCPClient({
        "x402-api": {
            "transport": "stdio",
            "command": "npx",
            "args": ["-y", "@x402-api/mcp-server"],
        }
})

tools = await client.get_tools()

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

x402 api in other clients

x402 api MCP server