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ClickSend REST API v3 vs Country.is

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

APIClickSend REST API v3HEALTHY96Country.isHEALTHY99
Uptime · 30d
Uptime · 90d100%100%
Uptime · 30d100%100%
P50 · ms324189
P95 · ms1035643
AuthapiKeynone
CORSyesyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree tier — API key requiredFree, no API key required
Rate limit6000 req/window · 5999 remaining · resets 1Unpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

ClickSend REST API v3 vs Country.is: common questions

Which is more reliable, ClickSend REST API v3 or Country.is?

Both are neck-and-neck — ClickSend REST API v3 and Country.is each measure 100% 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, ClickSend REST API v3 or Country.is?

Country.is has the lower median latency in our checks — ClickSend REST API v3 responds in 324 ms versus Country.is at 189 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 ClickSend REST API v3 and Country.is need an API key?

Country.is needs no key, while ClickSend REST API v3 requires a free API key. If you want to start calling without signup, reach for Country.is first.

Can I call ClickSend REST API v3 and Country.is from the browser?

Yes — both ClickSend REST API v3 and Country.is 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 ClickSend REST API v3 and Country.is free for commercial use?

ClickSend REST API v3 has unclear commercial terms, and Country.is 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.