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ClickSend REST API v3 vs ipapi.co

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

APIClickSend REST API v3HEALTHY96ipapi.coDYING35
Uptime · 30d
Uptime · 90d100%1.0%
Uptime · 30d100%1.7%
P50 · ms324440
P95 · ms1035440
AuthapiKeynone
CORSyesyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree tier — API key requiredFree — quota not published; returns 429 when exceeded
Rate limit6000 req/window · 5999 remaining · resets 1Unpublished (429 Quota exceeded)
In directory since2026-07-052026-07-05
operationalpartialdownno data

ClickSend REST API v3 vs ipapi.co: common questions

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

On our scheduled checks, ClickSend REST API v3 leads on measured uptime — ClickSend REST API v3 at 100% versus ipapi.co at 1.0% 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, ClickSend REST API v3 or ipapi.co?

ClickSend REST API v3 has the lower median latency in our checks — ClickSend REST API v3 responds in 324 ms versus ipapi.co at 440 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 ipapi.co need an API key?

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

Can I call ClickSend REST API v3 and ipapi.co from the browser?

Yes — both ClickSend REST API v3 and ipapi.co 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 ipapi.co free for commercial use?

ClickSend REST API v3 has unclear commercial terms, and ipapi.co 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.