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Fixer API vs Voidly

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

APIFixer APIHEALTHY93VoidlyHEALTHY78
Uptime · 30d
Uptime · 90d99.02%100%
Uptime · 30d98.3%100%
P50 · ms4481238
P95 · ms8303894
AuthapiKeynone
CORSnoyes
HTTPSyesyes
Card requirednono
Commercial useunclearyes
Data licenseUnverifiedCC BY 4.0
Free tierFree tier — API key requiredFree (keyless data endpoints; Hydra ML endpoints need a key)
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Fixer API vs Voidly: common questions

Which is more reliable, Fixer API or Voidly?

On our scheduled checks, Voidly leads on measured uptime — Fixer API at 99.02% versus Voidly at 100% over 90 days. These are our own probe results, not provider claims; the uptime bars above show the day-by-day record for both.

Which is faster, Fixer API or Voidly?

Fixer API has the lower median latency in our checks — Fixer API responds in 448 ms versus Voidly at 1238 ms (P50). Tail latency (P95) is in the table above; for most workloads the median is the number that shapes how the API feels.

Do Fixer API and Voidly need an API key?

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

Can I call Fixer API and Voidly from the browser?

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

Are Fixer API and Voidly free for commercial use?

Fixer API has unclear commercial terms, and Voidly allows commercial use on its free tier. 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.