shipapis
StarSubmit an APISubmit API

Arbeitnow vs MailCheck.ai

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

APIArbeitnowNEW—MailCheck.aiNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
Authnonenone
CORSyesyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — no key requiredFree — limits not published
Rate limit5 req/window · 4 remaining5 req/window · 4 remaining
In directory since2026-07-052026-07-05
operationalpartialdownno data

Arbeitnow vs MailCheck.ai: common questions

Which is more reliable, Arbeitnow or MailCheck.ai?

On our scheduled checks, MailCheck.ai leads on measured uptime — Arbeitnow at —% versus MailCheck.ai 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 Arbeitnow and MailCheck.ai need an API key?

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

Can I call Arbeitnow and MailCheck.ai from the browser?

Yes — both Arbeitnow and MailCheck.ai 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 Arbeitnow and MailCheck.ai free for commercial use?

Arbeitnow has unclear commercial terms, and MailCheck.ai 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.