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MailboxValidator Free Email Checker vs Truth or Dare API

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

APIMailboxValidator Free Email CheckerHEALTHY96Truth or Dare APIHEALTHY75
Uptime · 30d
Uptime · 90d99.44%100%
Uptime · 30d98.3%100%
P50 · ms248412
P95 · ms11381013
AuthapiKeynone
CORSnoyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree tier — API key requiredFree — limits not published
Rate limitUnpublished5 req/window · 4 remaining · resets 5
In directory since2026-07-052026-07-05
operationalpartialdownno data

MailboxValidator Free Email Checker vs Truth or Dare API: common questions

Which is more reliable, MailboxValidator Free Email Checker or Truth or Dare API?

On our scheduled checks, Truth or Dare API leads on measured uptime — MailboxValidator Free Email Checker at 99.44% versus Truth or Dare API at 100% over 90 days. These are our own probe results, not provider claims; the uptime bars above show the day-by-day record for both.

Which is faster, MailboxValidator Free Email Checker or Truth or Dare API?

MailboxValidator Free Email Checker has the lower median latency in our checks — MailboxValidator Free Email Checker responds in 248 ms versus Truth or Dare API at 412 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 MailboxValidator Free Email Checker and Truth or Dare API need an API key?

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

Can I call MailboxValidator Free Email Checker and Truth or Dare API from the browser?

Only Truth or Dare API 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 Truth or Dare API free for commercial use?

MailboxValidator Free Email Checker has unclear commercial terms, and Truth or Dare 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.