The Base x402 marketplace

Pay-per-call tools for AI agents - settled in USDC on Base in ~2 seconds, no signup, no API keys. The wallet is the account.

An open index of the whole Base x402 economy - this host plus every independent seller the crawl finds (CDP Bazaar included), each re-probed every 30 minutes. Not a walled market: other venues' listings appear here too.

Our latest own settlement (canary): $0.003 USDC · on-chain receipt · 2026-10-09T07:31:01.000Z

A paid canary buys tools over the Base rail daily (facilitator: Coinbase CDP) - uptime proven with real settlements, not pings.

Accept the Base CAIP-2 network (eip155:8453) in your 402 challenge - the Coinbase CDP facilitator verifies and settles, and a listed origin is picked up by the CDP Bazaar too. Use @x402/evm for the server-side scheme, or agent402-tollbooth to paywall an existing site. Then serve /.well-known/x402 - list it on /sell (free) and the index crawler picks it up; ranking is health-based, listing is free. Want a guaranteed crawl? Open a seed request.

{
  "scheme": "exact",
  "network": "eip155:8453",
  "asset": "USDC",
  "payTo": "your-wallet"
}