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Poptin API vs Vercel API

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

APIPoptin APIREACHABLE100Vercel APIDEAD0
Uptime · 30d
Uptime · 90d100%0.0%
Uptime · 30d100%0.0%
P50 · ms698—
P95 · ms1705—
AuthapiKeyapiKey
CORSyesyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverified
Free tierFree tier — API key required
Rate limit120 req/window · 119 remainingUnpublished
In directory since2026-10-042026-07-05
operationalpartialdownno data

Poptin API vs Vercel API: common questions

Which is more reliable, Poptin API or Vercel API?

On our scheduled checks, Poptin API leads on measured uptime — Poptin API at 100% versus Vercel API at 0.0% over 90 days. These are our own probe results, not provider claims; the uptime bars above show the day-by-day record for both.

Do Poptin API and Vercel API need an API key?

Both ask you to authenticate — Poptin API uses an API key and Vercel API 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 Poptin API and Vercel API from the browser?

Yes — both Poptin API and Vercel 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 Poptin API and Vercel API free for commercial use?

Poptin API has unclear commercial terms, and Vercel 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.