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ClickSend REST API v3 vs ipapi.com

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

APIClickSend REST API v3HEALTHY96ipapi.comHEALTHY96
Uptime · 30d
Uptime · 90d100%100%
Uptime · 30d100%100%
P50 · ms324301
P95 · ms10351575
AuthapiKeyapiKey
CORSyesno
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree tier — API key requiredFree tier — key may be required
Rate limit6000 req/window · 5999 remaining · resets 1Unpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

ClickSend REST API v3 vs ipapi.com: common questions

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

Both are neck-and-neck — ClickSend REST API v3 and ipapi.com 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 ipapi.com?

ipapi.com has the lower median latency in our checks — ClickSend REST API v3 responds in 324 ms versus ipapi.com at 301 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.com need an API key?

Both ask you to authenticate — ClickSend REST API v3 uses an API key and ipapi.com uses an API key. Each key is free to obtain; the Auth and Card-required rows above spell out the signup terms.

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

Only ClickSend REST API v3 is browser-friendly — it returns CORS headers over HTTPS. ipapi.com needs a server-side call or proxy, so factor that into which one fits a front-end project.

Are ClickSend REST API v3 and ipapi.com free for commercial use?

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