Observed arrival · 2026-10-26

ProbeKit turns mail and DNS checks into priced API calls

probekit.dev Visit website

Editorial interest 78/100 Selection signal · not a rating of the site

ProbeKit offers free browser checks and a pay-per-request API for mail, DNS, and domain diagnostics, with structured findings explaining what it found.

Landing page captured for the 2026-10-26 issue.

For: Developers and AI agents checking mail or DNS configuration
Worth noticing: One DKIM discovery check tries 27 common selectors; bulk mail checks cover up to 20 items.

Field notes

The catalog covers individual records and broader checks, including SPF lookup-budget evaluation, MTA-STS policy and MX coverage, and reverse-DNS forward confirmation. The page says each tool documents its inputs, limits, and findings; it also distinguishes the currently published finding codes from JSON schemas and a machine-readable API description that are still planned.

Observed signals

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Editorial observations of this landing page, not a rating.

○OpenPublic substance visible

$PaidCommerce or pricing visible

✦PrettyNotable craft visible

●ProPolished or operationally mature

◎NicheUnusually specific use

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