shipapis
StarSubmit an APISubmit API

ip-api.com vs MailboxValidator Free Email Checker

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

APIip-api.comNEW—MailboxValidator Free Email CheckerNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthnoneapiKey
CORSyesno
HTTPSnoyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — limits not publishedFree tier — API key required
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

ip-api.com vs MailboxValidator Free Email Checker: common questions

Which is more reliable, ip-api.com or MailboxValidator Free Email Checker?

On our scheduled checks, MailboxValidator Free Email Checker leads on measured uptime — ip-api.com at —% versus MailboxValidator Free Email Checker 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 ip-api.com and MailboxValidator Free Email Checker need an API key?

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

Can I call ip-api.com and MailboxValidator Free Email Checker from the browser?

Neither sends browser-friendly CORS headers reliably, so call ip-api.com 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 ip-api.com and MailboxValidator Free Email Checker free for commercial use?

ip-api.com 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.