GeoJS vs US ZipCode
Same instrument, two spec sheets — measured, not claimed.
GeoJS vs US ZipCode: common questions
Which is more reliable, GeoJS or US ZipCode?
On our scheduled checks, US ZipCode leads on measured uptime — GeoJS at —% versus US ZipCode 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 GeoJS and US ZipCode need an API key?
GeoJS needs no key, while US ZipCode requires a free API key. If you want to start calling without signup, reach for GeoJS first.
Can I call GeoJS and US ZipCode from the browser?
Yes — both GeoJS and US ZipCode 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 GeoJS and US ZipCode free for commercial use?
GeoJS has unclear commercial terms, and US ZipCode 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.