Services with a OpenAPI description
A published machine-readable API description that an agent can read to learn how to call the service.
Ahrefs
SEO and backlink analysis tools.
Alpha Vantage
Stock, forex and crypto market data API.
Attio
Customisable CRM.
Coursera
Online course platform with university and company partners.
Frankfurter
Free open-source API for foreign exchange reference rates published by the ECB.
GraphHopper
Routing and route optimisation API.
Luma
Event page, registration and calendar platform.
OpenCage
Geocoding API built on open data.
Pinecone
Managed vector database.
Razorpay
Indian payments gateway and business banking.
Redfin
US real estate brokerage and listings site.
Semgrep
Static analysis and code security scanning.
Slack
Team messaging platform.
SoundCloud
Audio streaming and creator platform.
TheMealDB
Crowd-sourced recipe database with a free JSON API.
Thumbtack
Marketplace for hiring local home-service professionals.
Transport for London
London transport authority; publishes a unified open data API.
Trip.com
Online travel agency for flights, hotels, trains and tours, part of Trip.com Group.
Unsplash
Free-to-use photo library with an API.
US National Weather Service
US government weather forecasts, alerts and observations API.
Visual Crossing Weather
Historical and forecast weather data API.
WeatherAPI.com
Weather and geolocation API with a free tier.
Wolfram|Alpha
Computational knowledge engine; offers an API designed for LLM use.