City, Gdynia vs OpenMercantil

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

Uptime · 30d
Uptime · 90d99.44%96.1%
Uptime · 30d100%94.8%
P50 · ms62455
P95 · ms39333973
Authnonenone
CORSyesyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree / open dataFree — anonymous, no key
Rate limitUnpublished60 req/min, 200 req/day per IP (anonymous)
In directory since2026-07-052026-07-05
operationalpartialdownno data

City, Gdynia vs OpenMercantil: common questions

Which is more reliable, City, Gdynia or OpenMercantil?

On our scheduled checks, City, Gdynia leads on measured uptime — City, Gdynia at 99.44% versus OpenMercantil at 96.1% 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, City, Gdynia or OpenMercantil?

OpenMercantil has the lower median latency in our checks — City, Gdynia responds in 624 ms versus OpenMercantil at 55 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 City, Gdynia and OpenMercantil need an API key?

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

Can I call City, Gdynia and OpenMercantil from the browser?

Yes — both City, Gdynia and OpenMercantil 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 City, Gdynia and OpenMercantil free for commercial use?

City, Gdynia has unclear commercial terms, and OpenMercantil 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.