Yelp
HTTPS CORS ? OAuth
Find Local Business
API Endpoint
https://www.yelp.com/developers/documentation/v3More 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