x402-list is an independent directory of APIs that accept x402, the open HTTP 402 payment standard that lets AI agents pay per request. For each listed service it shows endpoint pricing, accepted networks, monitored uptime from repeated live checks and the settlement activity observed on-chain. Submissions are reviewed by hand. The data is open under CC BY 4.0, with a free API and an MCP server agents can query directly. Not affiliated with Coinbase or the x402 Foundation.