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Simkl vs Sunor

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

APISimklNEW—SunorNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthnoneapiKey
CORSyesno
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseSimkl terms — user-contributed dataUnverified
Free tierFree read routes; client_id for searchFree tier — API key required
Rate limit1 req/s documentedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Simkl vs Sunor: common questions

Which is more reliable, Simkl or Sunor?

On our scheduled checks, Sunor leads on measured uptime — Simkl at —% versus Sunor at —% over 90 days. These are our own probe results, not provider claims; the uptime bars above show the day-by-day record for both.

Do Simkl and Sunor need an API key?

Simkl needs no key, while Sunor requires a free API key. If you want to start calling without signup, reach for Simkl first.

Can I call Simkl and Sunor from the browser?

Only Simkl is browser-friendly — it returns CORS headers over HTTPS. Sunor needs a server-side call or proxy, so factor that into which one fits a front-end project.

Are Simkl and Sunor free for commercial use?

Simkl has unclear commercial terms, and Sunor 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.