Comparison
Metal Sentinel vs. Metals-API
Metals-API has been around the longest, but developers regularly cite slow support and surprise rate limits. Metal Sentinel publishes its limits up front, ships a free RapidAPI tier, and includes embeddable widgets in the box.
metals-api.com · Last reviewed August 2026
Side-by-side
| Feature | Metal Sentinel | Metals-API |
|---|---|---|
| Spot data source | Primary market feed | Mixed provider feeds |
| Metals covered | 10 metals (precious + base) | Wide catalog including LBMA/LME |
| Currencies | 180+ fiat and crypto | 170+ currencies |
| Rate-limit transparency | Documented per RapidAPI plan | Frequently cited as unclear |
| Support response | Direct contact + RapidAPI | Cited as slow by users |
| Embeddable widgets | Yes — included | Limited |
| Free tier | Yes, on RapidAPI | Yes, but historically tight limits |
Where Metal Sentinel wins
- Transparent rate limits documented per RapidAPI plan
- Free tier with no credit card requirement
- Embeddable widgets bundled, not paid add-ons
- Editorial coverage and per-metal landing pages for SEO
When Metals-API might still be the right call
We don't pretend every team should pick us. If you've already integrated Metals-API, your traffic fits inside their free tier, and you don't need embeddable widgets or 180+ currencies, there's no urgent reason to migrate. The case for Metal Sentinel gets stronger the more of these you need: more metals, more currencies, embeddable surfaces, transparent pricing, and a primary market data feed.
See it in your stack in 5 minutes
Subscribe on RapidAPI, copy your key, and pull live spot quotes for any of our ten metals in any currency.