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.
 AlpacaMCPllms.txt Commission-free US stocks, options, and crypto brokerage API with a free paper-trading environment | Markets | ||
 Permissionless perpetuals exchange whose full order book and order-entry API are open to any wallet-signed client | Markets | ||
 KalshiOpenAPI CFTC-regulated event contract exchange with a documented REST and WebSocket API for algorithmic trading | Markets | ||
 Play-money prediction market with a fully open API that explicitly invites trading bots | Markets | ||
 Polygon.ioMCPllms.txt Stocks, options, forex, and crypto market data over REST and WebSocket, with a free self-serve API key | Markets | ||
 Onchain prediction market with an open CLOB API and wallet-signed order placement | Markets | ||
 Live and historical sports odds from global bookmakers over a REST API with a free self-serve tier | Markets | ||
 Betting exchange with a documented JSON-RPC API for automated market data and bet placement | Markets | ||
 Spot and futures crypto exchange with documented REST and WebSocket endpoints for order entry | Markets |
Same query as JSON: /api/v1/services?category=markets