OpenMercantil API
HTTPS CORS Free
Spanish company and BORME public data API with JSON and CSV access
API Endpoint
https://openmercantil.es/api/documentacionMore 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