Mozilla tls scanner

Security · Operational · 30d uptime 100%

An observatory for TLS configurations, X509 certificates, and more. - mozilla/tls-observatory

Trust signals

Pricing

FREE

Auth

NONE

CORS

No

Rate limit

Unknown

Health

576ms

Trust score

84 (B)

Last checked Sep 4, 2026 · uptime 24h 100% / 7d 100% / 30d 100%

Strong candidate; weakest signal is CORS.

Links

Base URLgithub.com/mozilla/tls-observatory#api-endpoints

Integration checklist

Auth is NONE
No CORS — route calls through your backend.
Rate limit: Unknown

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