Stainless · Domain Security

Stainless Domain Security

Domain security

Domain security posture for Stainless, probed live across 2 host(s) and 1 registrable domain(s). 2 host(s) serve HTTPS (up to TLSv1.3); 0 advertise HSTS. Email/DNS controls: DNSSEC absent, SPF present, DMARC present (p=quarantine).

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Transport & Host Security

www.stainless.com
HTTPS: yes · TLS: TLSv1.3 · HSTS: no · cert expires: Aug 16 06:19:18 2026 GMT
api.stainless.com
HTTPS: yes · TLS: TLSv1.3 · HSTS: no · cert expires: Sep 23 20:45:39 2026 GMT

Domain (DNS/Email) Security

stainless.com
DNSSEC: no · SPF: yes · DMARC: yes (p=quarantine) · CAA: none

Source

Domain Security

Raw ↑ 
generated: '2026-07-11'
method: probed
source: live DNS/TLS/HTTP probes of apis.yml + OpenAPI hosts
hosts:
- host: www.stainless.com
  https: true
  tls_version: TLSv1.3
  cert_expires: Aug 16 06:19:18 2026 GMT
  hsts: false
- host: api.stainless.com
  https: true
  tls_version: TLSv1.3
  cert_expires: Sep 23 20:45:39 2026 GMT
  hsts: null
domains:
- domain: stainless.com
  dnssec: false
  caa: []
  spf: true
  dmarc: true
  dmarc_policy: quarantine