A directory of services AI agents can actually use — APIs, tools and merchants with machine-readable interfaces and agent payment protocols. Badges are probe-backed, never self-asserted.
| Score |
|---|
 SkyfireMCPOpenAPIllms.txtx402 KYA agent identity plus wallets and pay-per-call settlement so services can charge unknown agents safely | Payments | ||
 TempoMCPOpenAPIllms.txtMPP Payments-focused L1 built for machine payments, co-author of MPP and home of the MPP service directory | Payments | ||
 Visa Intelligent CommerceOpenAPIMPPTAPACPUCPAP2ICC Network tokens and credentials for approved agents, plus one endpoint bridging TAP, MPP, ACP and UCP | Payments | ||
 Visa Trusted Agent ProtocolOpenAPITAP Open framework using HTTP Message Signatures (RFC 9421) so merchants can recognize and trust a legitimate agent before it transacts | Payments | ||
 ZuploMCPOpenAPIllms.txtx402 API gateway that puts an x402 or key-based paywall in front of any endpoint agents call | Payments | ||
 Amex developer kit for agent-initiated card payments with cardholder-scoped authorization | Payments | ||
 Coinbase CommerceOpenAPI Accept stablecoin and crypto payments through a hosted checkout API | Payments | ||
 NekudaOpenAPIACP Wallet and mandate infrastructure for agentic checkout, aligned to ACP flows | Payments | ||
 NOWPaymentsOpenAPIllms.txt Crypto payment gateway API supporting 300+ assets with webhooks and payouts | Payments | ||
 PaymanOpenAPI Human-in-the-loop payment rails that let agents move real money under explicit approval policies | Payments | ||
 SlashOpenAPIllms.txt Programmatic virtual card issuing with agent-compatible APIs and granular spend rules | Payments |
Same query as JSON: /api/v1/services?category=pay&page=2