PublicDataHub
HTTPS CORS Free
US public schools, hospitals and federal agency budgets as JSON/CSV, with provenance
API Endpoint
https://publicdatahub.org/apiMore 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