Services — the AI agent directory

Services in the directory
Service	Tags	Interfaces	Payments	Auth	Score
Coinbase Developer Platform Server wallets, AgentKit, and the public x402 facilitator agents use to sign and settle stablecoin payments MCPOpenAPIllms.txt	wallets+4	MCP+2	x402	wallet, Payments	5/5
x402 Open HTTP 402 standard for per-request stablecoin payments, now at v2 and governed by the x402 Foundation OpenAPIllms.txt	x402+4	OpenAPI+1	x402	x402-none, Payments	5/5
Agent Payments Protocol (AP2) Open protocol using signed mandates so agents can transact within user-defined limits, with x402 and card rails llms.txt	ap2+4	llms.txt	AP2+1	wallet, Payments	4/5
ATXP Agent payments platform wrapping x402 wallets, per-call billing, and a hosted tool marketplace agents can spend against MCPOpenAPIllms.txt	x402+4	MCP+2	x402	wallet, Payments	4/5
Circle USDC issuance, programmable wallets, and Circle Payments for agent-to-agent settlement MCPOpenAPIllms.txt	usdc+3	MCP+2	x402	api-key, Payments	4/5
Nevermined Metering, authorization, and settlement for agent APIs, including an x402 facilitator and credit-based plans MCPOpenAPIllms.txt	monetization+4	MCP+2	x402	api-key, Payments	4/5
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
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