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ViaCep vs Visitor Statistics API

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

APIViaCepHEALTHY87Visitor Statistics APIHEALTHY86
Uptime · 30d
Uptime · 90d98.0%98.0%
Uptime · 30d98.3%98.3%
P50 · ms651847
P95 · ms22772159
Authnonenone
CORSyesno
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — limits not publishedFree — limits not published
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

ViaCep vs Visitor Statistics API: common questions

Which is more reliable, ViaCep or Visitor Statistics API?

Both are neck-and-neck — ViaCep and Visitor Statistics API each measure 98.0% uptime over 90 days on our probe schedule. Reliability here is verified from our own scheduled checks; use the 30-day bars above to see which has been steadier lately.

Which is faster, ViaCep or Visitor Statistics API?

ViaCep has the lower median latency in our checks — ViaCep responds in 651 ms versus Visitor Statistics API at 847 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 ViaCep and Visitor Statistics API need an API key?

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

Can I call ViaCep and Visitor Statistics API from the browser?

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

Are ViaCep and Visitor Statistics API free for commercial use?

ViaCep has unclear commercial terms, and Visitor Statistics API 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.