x402 Preflight for LangChain
io.github.chico10117/x402-preflight
Inspect and validate an x402 endpoint before an autonomous agent spends USDC.
client:LangChain
transport:streamable-http
tools:3
Install x402 Preflight in LangChain
pip install langchain-mcp-adapters
from langchain_mcp_adapters.client import MultiServerMCPClient
client = MultiServerMCPClient({
"x402-preflight": {
"transport": "streamable_http",
"url": "https://x402.chikocorp.com/mcp",
}
})
tools = await client.get_tools()
get_tools() returns the server's tools as LangChain tools, ready for an agent. LangChain docs