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.
| Category |
|---|
| Score |
|---|
 Flight, hotel, and destination content APIs with self-serve keys and a free test environment | Merchants | ||
 Cal.comllms.txt Open-source scheduling with a documented API for availability lookups and booking meetings | Merchants | ||
 DuffelOpenAPI Flights, stays, and ancillaries — search, book, pay, and manage orders from one travel API | Merchants | ||
 PostalFormOpenAPIllms.txtMPP Send physical mail and postcards over an API, payable per item over MPP | Merchants | ||
 RyeOpenAPIACP Universal commerce API for agent-initiated purchases across Shopify and major retailers | Merchants | ||
 ZincOpenAPI Purchasing API that places, tracks, and returns orders at Amazon, Walmart, Target, and Best Buy on behalf of agents | Merchants | ||
 Firmly.aiOpenAPIACP Agentic checkout that makes any digital surface shoppable while the merchant stays merchant of record | Merchants | ||
 KlarnaOpenAPIllms.txtUCP Pay-later and payment methods wired into agentic checkout, an early UCP adopter | Merchants | ||
 Namecheap APIOpenAPI Domain registration, transfers, and DNS management over API | Merchants | ||
 PrintfulOpenAPIllms.txt Print-on-demand production and fulfillment over a REST API | Merchants | ||
 New York sandwich shop that accepts agent-initiated orders and pays out over MPP | Merchants | ||
 Event, venue, and attraction inventory over a read-only REST API with self-serve keys | Merchants | ||
 WalmartOpenAPIUCP Retail catalog and fulfillment reachable to agents through UCP-aligned commerce surfaces | Merchants | ||
 Targetllms.txtUCP Big-box retail inventory participating in UCP agentic shopping journeys | Merchants | ||
 WayfairUCP Home goods catalog participating in UCP agentic shopping journeys | Merchants |
Same query as JSON: /api/v1/services?category=shop&auth_method=api-key