Metals-API Blog: Comprehensive Precious Metals Pricing API

A metals fluctuation API returns how a metal moved between two dates: start_rate, end_rate, change, and change_pct. On Metals-API that is GET https://metals-api.com/api/fluctuation with query access_key. Official docs sample uses symbols=XAU. Copper Monthly starts at $19.99/mo (2,500 calls, 10-minute updates, 10 symbols). There is no Free Trial. Gold Monthly is $149.99. Do not mix ISO XAU with LBMA (USDLBXAUPM). Docs: metals-api.com/documentation. Request: XAU over a range curl "https://metals-api.com/api/fluctuation?access_key=YOUR_API_KEY&start_date=2023-12-01&end_date=2015-12-15&symbols=XAU" Docs also show type=last_day instead of a date pair. USDXAU is a latest-only inve...