PayAPI Market

• Name: PayAPI Market
• URL: https://www.payapi.market/
• Category: x402 API marketplace / paid-service discovery / Base settlement wrapper
• Tags: ethereum-ecosystem
• Summary: PayAPI Market is a small x402 marketplace wrapper. It lists paid APIs, pushes discovery into MCP-friendly surfaces, and settles usage in USDC on Base with onchain splits to provider wallets. Useful directory packaging, not a new payment rail.
• What it does:
  • Lets API providers list endpoints, descriptions, and per-request x402 prices without requiring traditional subscription packaging
  • Exposes a marketplace where AI agents can discover live APIs across data, verification, finance, scraping, and utility categories
  • Uses MCP-oriented distribution and registry sync so listed APIs can be surfaced to compatible agent runtimes automatically
  • Settles pay-per-request usage in USDC on Base with provider wallet payouts and marketplace fee capture handled on-chain
  • Offers a self-registration flow for builders and a featured tier that changes marketplace ranking and manifest placement
  • Ships a lightweight front-end repo that emphasizes browsing, search/filtering, listing, and Claude Desktop config copy for buyers
• Key claims:
  • The homepage says providers can turn specialist knowledge into a money-making API in about five minutes and that PayAPI handles payments, hosting, and discovery
  • The homepage and marketplace page say the launch catalog includes 10 live APIs and 65 endpoints spanning UK public data, email verification, company enrichment, postcode lookup, FX/crypto data, screenshots, DNS intelligence, scraping, IP geolocation, and QR tooling
  • The homepage says agents discover listed APIs through MCP-compatible surfaces and pay per request in USDC on Base rather than through buyer subscriptions or annual contracts
  • The pricing page says listing is free on the base tier, providers keep 97% of successful-call revenue, and the default platform take rate is 3%
  • The pricing FAQ says fees are split on-chain, providers supply their own Base wallet address, and endpoint-level pricing can be set individually from MCP server configuration
  • The GitHub README describes the project as a place to discover and list x402-powered APIs, highlights click-to-copy Claude Desktop configs, and frames the marketplace as a searchable registry for paid agent-consumable services
• Whitepaper: No canonical standalone PayAPI Market whitepaper or litepaper surfaced in this pass. The clearest current sources of truth were the official homepage, marketplace page, pricing page, and canonical GitHub repository; see ../whitepapers/payapi-market-primary-sources-2026-05-03.md.
• Sources:
  • https://www.payapi.market/
  • https://www.payapi.market/marketplace
  • https://www.payapi.market/pricing
  • https://github.com/chetparker/x402-marketplace

Internal linkages

• Underlying rail: x402
• Stronger directory reference: 402-index

Control surface

• The practical power sits in listing admission, ranking, featured placement, MCP distribution, fee splits, and wallet-level payout wiring.

• That is marketplace control, not protocol control.

• Read PayAPI Market as a thin seller directory riding on stronger paid-request rails and authorization layers.

• Last reviewed: 2026-06-03 UTC