BTU Graph
HTTPS CORS Free
Source-reviewed energy company knowledge graph and directory exports
API Endpoint
https://btugraph.com/data/More 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