Same-sounding names, different products
For GoldAPI.io, its plan listing shows Sandbox (up to 100 requests/month) and Unlimited ($99/month). Check the exact domain and terms before using an account or key.
If a tutorial, forum thread, or AI answer references one of these by a URL you don't recognize, check the domain before pasting in an API key.
Pricing shape
For GoldAPI.io, its plan listing shows Sandbox (up to 100 requests/month) and Unlimited ($99/month). Check its terms for commercial use.
Coverage and depth
GoldAPI.io's strongest documented claim is LBMA AM fix history since 1968 and LBMA AM/PM fix redistribution rights, plus silver spot and futures at parity with gold. Gold-API.com ships gold and silver spot on the free tier, plus Bitcoin bundled on the same key, but doesn't publish a currencies-supported figure or a multi-year historical depth claim the way GoldAPI.io does. GoldAPI.io's per-source attribution is not stated in our sources.
Who each one fits
GoldAPI.io fits a team that needs LBMA-sourced pricing, is building a commercial product from day one, and doesn't mind a paid-first entry point. Gold-API.com fits a hobby project, a prototype, or a widget that needs a live gold or silver number without signing up for anything first, with room to pay $10/mo later if historical data becomes a requirement.