Same-sounding names, different products
GoldAPI.io and Gold-API.com aren't affiliated, don't share infrastructure as far as either public site states, and land in different parts of the market. GoldAPI.io reads as a paid-first API built for teams that need LBMA-sourced pricing and are comfortable starting at $4.99/mo. Gold-API.com reads as a hobbyist-friendly free tool: no card to start, unlimited real-time requests, and a single $10/mo upgrade for anyone who needs more historical data than the free hourly cap allows.
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
GoldAPI.io's public pricing starts at $4.99/mo and tops out at a $129/mo production plan, with commercial use permitted on every paid tier. Gold-API.com's model is simpler: free with no rate cap on real-time price requests, and a single $10/mo Premium plan that removes the 10 requests/hour cap on historical and OHLC calls. Neither publishes a monthly call quota the way a broader catalog API typically does; the constraints that exist are shaped around what each product is built to do (a full redistribution feed for GoldAPI.io, a lightweight price lookup for Gold-API.com).
Coverage and depth
GoldAPI.io's strongest documented claim is 20+ years of historical daily data 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. Neither publishes a sources array or a stated methodology for how their single price number is derived.
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.