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Marketstack vs CoinGecko

Same instrument, two spec sheets — measured, not claimed.

APIMarketstackUNMONITORED—CoinGeckoDEGRADED—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthapiKeyapiKey
CORSnono
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedProprietary — attribution required
Free tierFree tier — key may be required10k calls/mo demo key, no card
Rate limitUnpublished~30/min, tightens under load
In directory since2026-07-052026-05-02
operationalpartialdownno data

Marketstack vs CoinGecko: common questions

Which is more reliable, Marketstack or CoinGecko?

Only CoinGecko is on our probe schedule so far (—% uptime over 90 days). The other is catalogued but not yet live-checked, so we can't compare measured reliability head-to-head — check the uncovered API's own status page for now.

Do Marketstack and CoinGecko need an API key?

Both ask you to authenticate — Marketstack uses an API key and CoinGecko uses an API key. Each key is free to obtain; the Auth and Card-required rows above spell out the signup terms.

Can I call Marketstack and CoinGecko from the browser?

Neither sends browser-friendly CORS headers reliably, so call Marketstack and CoinGecko from a server or proxy rather than client-side. The CORS and HTTPS rows above show exactly what we detected for each.

Are Marketstack and CoinGecko free for commercial use?

Marketstack has unclear commercial terms, and CoinGecko has unclear commercial terms. We track service terms and the data license as separate fields — see the Commercial use and Data license rows above, and confirm both before shipping either in a paid product.