MCP server that gives Claude/GPT agents commerce tools — each tool call pays an upstream x402 endpoint and returns its artifact
View on GitHub ↗Homepage ↗MCP server that gives Claude/GPT agents commerce tools — each tool call pays an upstream x402 endpoint and returns its artifact.
Pay in USDC on Base or Solana — the agent picks the rail, per call.
Give a model a wallet, a spending cap, and a dozen merchants. booktable, searchflights, buyitem, checkweather — each tool call pays an upstream x402 route in USDC and hands back the merchant's artifact with the payment receipt attached. The model never sees a key, never signs anything, and cannot spend past a cap it doesn't control.
Tool-using agents hit a wall the moment a tool costs money: API keys have to be provisioned per merchant, per agent, in advance, by a human. x402 inverts that — the merchant advertises a price in a 402, the agent signs a USDC payment for exactly that amount, and the goods come back in the same response. A new merchant becomes a new tool by adding four lines to a JSON file. No signup, no key distribution, no billing relationship, and a per-call cost the agent can reason about because it is printed in the result.
Add it to Claude Desktop with examples/claudedesktopconfig.json, restart, and ask for a table next Friday.
Twelve commerce tools, generated from config/tools.json, plus three built-ins. Every commerce tool takes an optional rail argument.
Tool Upstream Price What you get back ------------ searchflights x402-flight-search $0.005 Priced offers for a route and date. priceflight x402-flight-search $0.003 Live price + availability for one offer. findtables x402-tablebook $0.001 Open reservation slots. booktable x402-tablebook $0.01 Confirmed re
From the project README.
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