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MailboxValidator Free Email Checker vs REST API Beispiele

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

APIMailboxValidator Free Email CheckerNEW—REST API BeispieleNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthapiKeynone
CORSnoyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree tier — API key requiredFree — limits not published
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

MailboxValidator Free Email Checker vs REST API Beispiele: common questions

Which is more reliable, MailboxValidator Free Email Checker or REST API Beispiele?

On our scheduled checks, REST API Beispiele leads on measured uptime — MailboxValidator Free Email Checker at —% versus REST API Beispiele 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 MailboxValidator Free Email Checker and REST API Beispiele need an API key?

REST API Beispiele needs no key, while MailboxValidator Free Email Checker requires a free API key. If you want to start calling without signup, reach for REST API Beispiele first.

Can I call MailboxValidator Free Email Checker and REST API Beispiele from the browser?

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

Are MailboxValidator Free Email Checker and REST API Beispiele free for commercial use?

MailboxValidator Free Email Checker has unclear commercial terms, and REST API Beispiele 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.