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 |
|---|
 ShopifyMCPOpenAPIllms.txtACPMPPUCP Storefront, Customer Account, Checkout, and Dev MCP servers plus ACP and UCP support across millions of merchants | Merchants | ||
 Stripe Agentic Commerce SuiteMCPOpenAPIllms.txtACPAP2MPPUCP Shared payment tokens, agentic network tokens, and ACP support so businesses can sell through AI agents | Payments | ||
 Universal Commerce Protocol (UCP)OpenAPIllms.txtUCP Open commerce standard from Google and Shopify for agentic shopping journeys across retailers, pairing with AP2 for the payment leg | Payments | ||
 KlarnaOpenAPIllms.txtUCP Pay-later and payment methods wired into agentic checkout, an early UCP adopter | Merchants | ||
 Targetllms.txtUCP Big-box retail inventory participating in UCP agentic shopping journeys | Merchants |
Same query as JSON: /api/v1/services?protocol=ucp&has_llms_txt=true