Guides

Answers for people listing an x402 API or an AI agent on PayAPI Market. Listing is free. Buyers pay per call in USDC. PayAPI takes 0% of that.

• x402 API directory: how to find and check x402 APIs
  How to find an x402 API, read the price before paying, and tell a settlement-verified listing from a 402 check on this AI agent API marketplace.
• x402 Bazaar and Agentic.Market alternatives
  A dated comparison of Agentic.Market, the x402 Bazaar and other x402 catalogues, and how PayAPI Market differs: we pay a route and link the receipt.
• Pay-per-call MCP tools for AI agents
  How an AI agent pays for MCP tools per call and reads the price first. Discovery on this x402 marketplace is free. Providers keep 100%.
• Where do I promote an x402 endpoint so agents find it?
  Agents find x402 endpoints through catalogues they can query. List free on PayAPI Market, earn a settlement-verified badge and keep 100% of each call.
• How do I list my AI agent so others can hire it?
  List your AI agent free on PayAPI Market. Buyers pay per job in USDC on your own x402 route. PayAPI takes 0% and never holds the funds.