Urban Observatory
HTTP No CORS Free
The largest set of publicly available real time urban data in the UK
API Endpoint
https://urbanobservatory.ac.ukMore 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