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ClickSend REST API v3 vs IP Data API

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

APIClickSend REST API v3HEALTHY96IP Data APIHEALTHY96
Uptime · 30d
Uptime · 90d100%99.02%
Uptime · 30d100%100%
P50 · ms324124
P95 · ms10352082
AuthapiKeynone
CORSyesyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree tier — API key requiredFree — limits not published
Rate limit6000 req/window · 5999 remaining · resets 1Unpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

ClickSend REST API v3 vs IP Data API: common questions

Which is more reliable, ClickSend REST API v3 or IP Data API?

On our scheduled checks, ClickSend REST API v3 leads on measured uptime — ClickSend REST API v3 at 100% versus IP Data API at 99.02% 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 IP Data API?

IP Data API has the lower median latency in our checks — ClickSend REST API v3 responds in 324 ms versus IP Data API at 124 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 IP Data API need an API key?

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

Can I call ClickSend REST API v3 and IP Data API from the browser?

Yes — both ClickSend REST API v3 and IP Data API 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 IP Data API free for commercial use?

ClickSend REST API v3 has unclear commercial terms, and IP Data API 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.