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 |
|---|
 AlpacaMCPllms.txt Commission-free US stocks, options, and crypto brokerage API with a free paper-trading environment | Markets | ||
 Polygon.ioMCPllms.txt Stocks, options, forex, and crypto market data over REST and WebSocket, with a free self-serve API key | Markets |
Same query as JSON: /api/v1/services?category=markets&has_mcp=true&auth_method=api-key