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Openwhyd vs Simkl

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

APIOpenwhydNEW—SimklNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
Authnonenone
CORSnoyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedSimkl terms — user-contributed data
Free tierFree — no key requiredFree read routes; client_id for search
Rate limitUnpublished1 req/s documented
In directory since2026-07-052026-07-05
operationalpartialdownno data

Openwhyd vs Simkl: common questions

Which is more reliable, Openwhyd or Simkl?

On our scheduled checks, Simkl leads on measured uptime — Openwhyd at —% versus Simkl 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 Openwhyd and Simkl need an API key?

Neither needs a paid key — Openwhyd is callable with no signup, and Simkl is callable with no signup. Both are quick to prototype with; rate limits still apply.

Can I call Openwhyd and Simkl from the browser?

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

Are Openwhyd and Simkl free for commercial use?

Openwhyd has unclear commercial terms, and Simkl 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.