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Free APIs: the verified list

Free APIs you can build on today — data, infrastructure, and utility endpoints, every free tier verified against the vendor's own pricing page in August 2026. Free, by email.

APIs you can call today, each with its real free-tier limit. The first six:

1. Open-Meteo
2. OpenWeather
3. GitHub REST API
4. NASA Open APIs
5. Frankfurter
6. ipinfo.io Lite