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Azure DevOps vs MailboxValidator Free Email Checker

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

APIAzure DevOpsHEALTHY97MailboxValidator Free Email CheckerHEALTHY94
Uptime · 30d
Uptime · 90d100%100%
Uptime · 30d100%100%
P50 · ms313527
P95 · ms8691138
AuthapiKeyapiKey
CORSnono
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

Azure DevOps vs MailboxValidator Free Email Checker: common questions

Which is more reliable, Azure DevOps or MailboxValidator Free Email Checker?

Both are neck-and-neck — Azure DevOps and MailboxValidator Free Email Checker each measure 100% uptime over 90 days on our probe schedule. Reliability here is verified from our own scheduled checks; use the 30-day bars above to see which has been steadier lately.

Which is faster, Azure DevOps or MailboxValidator Free Email Checker?

Azure DevOps has the lower median latency in our checks — Azure DevOps responds in 313 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 Azure DevOps and MailboxValidator Free Email Checker need an API key?

Both ask you to authenticate — Azure DevOps 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 Azure DevOps and MailboxValidator Free Email Checker from the browser?

Neither sends browser-friendly CORS headers reliably, so call Azure DevOps 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 Azure DevOps and MailboxValidator Free Email Checker free for commercial use?

Azure DevOps 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.