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Sofiaplan vs WhatIsMyIP API

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

APISofiaplanNEW—WhatIsMyIP APINEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
Authnonenone
CORSnoyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — limits not publishedFree — limits not published
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Sofiaplan vs WhatIsMyIP API: common questions

Which is more reliable, Sofiaplan or WhatIsMyIP API?

On our scheduled checks, WhatIsMyIP API leads on measured uptime — Sofiaplan at —% versus WhatIsMyIP API at —% over 90 days. These are our own probe results, not provider claims; the uptime bars above show the day-by-day record for both.

Do Sofiaplan and WhatIsMyIP API need an API key?

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

Can I call Sofiaplan and WhatIsMyIP API from the browser?

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

Are Sofiaplan and WhatIsMyIP API free for commercial use?

Sofiaplan has unclear commercial terms, and WhatIsMyIP 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.