Hand-picked lists
11 collections,
ready to build with.
Curated groupings of the atlas's APIs, built around what you're trying to do.
No key required
APIs you can call right now — no signup, no key, no waiting.
530 APIsNº 02↗CORS-ready browser APIs
Secure and CORS-enabled — safe to call straight from client-side JavaScript.
912 APIsNº 03↗Build a weather app
Forecasts, historical data, and alerts for your next weather project.
31 APIsNº 04↗Government open data
Public records, civic data, and official statistics from governments worldwide.
90 APIsNº 05↗Free-tier machine learning
Machine learning APIs you can start using for free.
20 APIsNº 06↗Crypto market data
Prices, market caps, and trading data for the cryptocurrency world.
53 APIsNº 07↗Worth knowing
A hand-picked spread of the atlas's most recognizable names.
12 APIsNº 08↗Spec-backed APIs
Every entry ships a real OpenAPI spec, so its detail page carries a full endpoint browser and Try It console.
139 APIsNº 09↗GeoJSON-native data
Location and open data that speak GeoJSON natively — pull the response straight onto a map.
33 APIsNº 10↗Build an agent toolbelt
Keyless and CORS-open — an autonomous agent can call every one of these with no signup step in the way.
12 APIsNº 11↗Clean up a signup form
Validate the email, phone, and address on a signup form, then screen for spam, fraud, and breach exposure.
15 APIs