GENESIS
HTTPS CORS ? OAuth
Federal Statistical Office Germany
API Endpoint
https://www.destatis.de/EN/Service/OpenData/api-webservice.htmlMore Open Data APIs
Unofficial US Federal Government API Development
HTTP CORS ? Free
Normalized historical records and 25 daily-updated reference series
HTTPS CORS Free
Land suitability scoring API for any US property: off-grid, rural, recreational, investment
HTTPS CORS ? apiKey