preflight402 for LangChain
io.ironshell/preflight402
Trust verdict for an x402 payment endpoint: health, 402 handshake, price, proceed/caution/avoid.
client:LangChain
transport:streamable-http
Install preflight402 in LangChain
pip install langchain-mcp-adapters
from langchain_mcp_adapters.client import MultiServerMCPClient
client = MultiServerMCPClient({
"preflight402": {
"transport": "streamable_http",
"url": "https://preflight402.ironshell.io/mcp",
}
})
tools = await client.get_tools()
get_tools() returns the server's tools as LangChain tools, ready for an agent. LangChain docs