ViaCep vs GeoJS
Same instrument, two spec sheets — measured, not claimed.
ViaCep vs GeoJS: common questions
Which is more reliable, ViaCep or GeoJS?
On our scheduled checks, GeoJS leads on measured uptime — ViaCep at —% versus GeoJS 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 ViaCep and GeoJS need an API key?
Neither needs a paid key — ViaCep is callable with no signup, and GeoJS is callable with no signup. Both are quick to prototype with; rate limits still apply.
Can I call ViaCep and GeoJS from the browser?
Yes — both ViaCep and GeoJS send CORS headers over HTTPS, so front-end code can fetch either directly with no backend proxy. That makes them easy to swap in a client-side app while you compare responses.
Are ViaCep and GeoJS free for commercial use?
ViaCep has unclear commercial terms, and GeoJS 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.