Services — the AI agent directory

Services in the directory
Service	Tags	Interfaces	Payments	Auth	Score
Skyfire KYA agent identity plus wallets and pay-per-call settlement so services can charge unknown agents safely MCPOpenAPIllms.txt	agent-identity+4	MCP+2	x402	wallet, Payments	4/5
Tempo Payments-focused L1 built for machine payments, co-author of MPP and home of the MPP service directory MCPOpenAPIllms.txt	mpp+4	MCP+2	MPP	wallet, Payments	4/5
Visa Intelligent Commerce Network tokens and credentials for approved agents, plus one endpoint bridging TAP, MPP, ACP and UCP OpenAPI	bridge+7	OpenAPI	MPP+5	api-key, Payments	4/5
Visa Trusted Agent Protocol Open framework using HTTP Message Signatures (RFC 9421) so merchants can recognize and trust a legitimate agent before it transacts OpenAPI	tap+4	OpenAPI	TAP	none, Payments	4/5
Zuplo API gateway that puts an x402 or key-based paywall in front of any endpoint agents call MCPOpenAPIllms.txt	api-gateway+4	MCP+2	x402	api-key, Payments	4/5
American Express Agentic Commerce Experiences Amex developer kit for agent-initiated card payments with cardholder-scoped authorization OpenAPI	ace+3	OpenAPI	ACE	api-key, Payments	3/5
Coinbase Commerce Accept stablecoin and crypto payments through a hosted checkout API OpenAPI	payments+3	OpenAPI	—	api-key, Payments	3/5
Nekuda Wallet and mandate infrastructure for agentic checkout, aligned to ACP flows OpenAPI	agent-wallets+3	OpenAPI	ACP	api-key, Payments	3/5
NOWPayments Crypto payment gateway API supporting 300+ assets with webhooks and payouts OpenAPIllms.txt	payments+3	OpenAPI+1	—	api-key, Payments	3/5
Payman Human-in-the-loop payment rails that let agents move real money under explicit approval policies OpenAPI	agent-payments+3	OpenAPI	—	api-key, Payments	3/5
Slash Programmatic virtual card issuing with agent-compatible APIs and granular spend rules OpenAPIllms.txt	virtual-cards+3	OpenAPI+1	—	api-key, Payments	3/5