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apilayer pdflayer vs MailboxValidator Free Email Checker

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

APIapilayer pdflayerHEALTHY96MailboxValidator Free Email CheckerHEALTHY96
Uptime · 30d
Uptime · 90d100%99.44%
Uptime · 30d100%98.3%
P50 · ms330248
P95 · ms12251138
AuthapiKeyapiKey
CORSyesno
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree tier — key may be requiredFree tier — API key required
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

apilayer pdflayer vs MailboxValidator Free Email Checker: common questions

Which is more reliable, apilayer pdflayer or MailboxValidator Free Email Checker?

On our scheduled checks, apilayer pdflayer leads on measured uptime — apilayer pdflayer at 100% versus MailboxValidator Free Email Checker at 99.44% 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, apilayer pdflayer or MailboxValidator Free Email Checker?

MailboxValidator Free Email Checker has the lower median latency in our checks — apilayer pdflayer responds in 330 ms versus MailboxValidator Free Email Checker at 248 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 apilayer pdflayer and MailboxValidator Free Email Checker need an API key?

Both ask you to authenticate — apilayer pdflayer uses an API key and MailboxValidator Free Email Checker uses an API key. Each key is free to obtain; the Auth and Card-required rows above spell out the signup terms.

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

Only apilayer pdflayer 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 apilayer pdflayer and MailboxValidator Free Email Checker free for commercial use?

apilayer pdflayer 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.