x402 Universal Payer for LangChain
io.github.nirholas/x402-bridge
Pay any x402 endpoint on the open web: auto-paying bridge with Bazaar discovery and spend caps.
client:LangChain
transport:stdio
runtime:npm
Install x402 Universal Payer in LangChain
pip install langchain-mcp-adapters
from langchain_mcp_adapters.client import MultiServerMCPClient
client = MultiServerMCPClient({
"x402-bridge": {
"transport": "stdio",
"command": "npx",
"args": ["-y", "@three-ws/mcp-bridge"],
}
})
tools = await client.get_tools()
get_tools() returns the server's tools as LangChain tools, ready for an agent. LangChain docs