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FakerAPI vs MailboxValidator Free Email Checker

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

APIFakerAPIDEAD0MailboxValidator Free Email CheckerHEALTHY94
Uptime · 30d
Uptime · 90d1.0%100%
Uptime · 30d0.0%100%
P50 · ms860527
P95 · ms8601138
AuthnoneapiKey
CORSnono
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — no keyFree tier — API key required
Rate limit60 req/window · 59 remainingUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

FakerAPI vs MailboxValidator Free Email Checker: common questions

Which is more reliable, FakerAPI or MailboxValidator Free Email Checker?

On our scheduled checks, MailboxValidator Free Email Checker leads on measured uptime — FakerAPI at 1.0% versus MailboxValidator Free Email Checker 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, FakerAPI or MailboxValidator Free Email Checker?

MailboxValidator Free Email Checker has the lower median latency in our checks — FakerAPI responds in 860 ms versus MailboxValidator Free Email Checker at 527 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 FakerAPI and MailboxValidator Free Email Checker need an API key?

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

Can I call FakerAPI and MailboxValidator Free Email Checker from the browser?

Neither sends browser-friendly CORS headers reliably, so call FakerAPI and MailboxValidator Free Email Checker from a server or proxy rather than client-side. The CORS and HTTPS rows above show exactly what we detected for each.

Are FakerAPI and MailboxValidator Free Email Checker free for commercial use?

FakerAPI has unclear commercial terms, and MailboxValidator Free Email Checker 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.