Tilth
HTTPS CORS Free
Free daily UK fertiliser price index across nine grades, CC BY 4.0 licensed
API Endpoint
https://www.tilth.uk/dataMore 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