Skip to content
YAS.SH

Developer API

Email-domain posture data without building a scanner yourself.

A security-conscious API for normalized SPF, DKIM, DMARC, MX, MTA-STS, TLS-RPT, DANE and TLS signals.

Built for ESPs, CRMs, hosting and onboarding platforms.

The outcome

Give product teams protocol-depth results through a clean API contract.

Read API docs

What it verifies

Scoped bearer keys stored only as hashes
RFC 9457 problem responses and rate limits
Bounded, SSRF-safe outbound probing

YAS reports externally observable technical signals. Review findings in the context of your environment.

Ask YAS AI
🍪 Cookies & privacy. Essential cookies keep you signed in and remember language and theme. Google AdSense and reCAPTCHA are Google technologies: AdSense runs only after Accept All; reCAPTCHA loads on sign-in and contact forms. See how Google uses data: https://policies.google.com/technologies/partner-sites cookie policy · privacy policy.
Settings