Steam · Domain Security

Steam Domain Security

Domain security

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

GamingValveDistributionSteamworksMarketplaceWeb API

Transport & Host Security

store.steampowered.com
HTTPS: yes · TLS: TLSv1.3 · HSTS: yes · cert expires: Aug 17 23:59:59 2026 GMT
api.steampowered.com
HTTPS: yes · TLS: TLSv1.3 · HSTS: no · cert expires: Sep 4 23:59:59 2026 GMT
partner.steam-api.com
HTTPS: yes · TLS: TLSv1.3 · HSTS: no · cert expires: Jul 31 23:59:59 2026 GMT

Domain (DNS/Email) Security

steampowered.com
DNSSEC: no · SPF: yes · DMARC: yes (p=reject) · CAA: yes
steam-api.com
DNSSEC: no · SPF: yes · DMARC: yes (p=reject) · CAA: yes

Source

Domain Security

steam-domain-security.yml Raw ↑ 
generated: '2026-07-11'
method: probed
source: live DNS/TLS/HTTP probes of apis.yml + OpenAPI hosts
hosts:
- host: store.steampowered.com
  https: true
  tls_version: TLSv1.3
  cert_expires: Aug 17 23:59:59 2026 GMT
  hsts: true
  hsts_max_age: 63072000
- host: api.steampowered.com
  https: true
  tls_version: TLSv1.3
  cert_expires: Sep  4 23:59:59 2026 GMT
  hsts: null
- host: partner.steam-api.com
  https: true
  tls_version: TLSv1.3
  cert_expires: Jul 31 23:59:59 2026 GMT
  hsts: null
domains:
- domain: steampowered.com
  dnssec: false
  caa:
  - 0 iodef "mailto:ssl-abuse@valvesoftware.com"
  - 0 issue "pki.goog"
  - 0 issue "digicert.com"
  - 0 issue "letsencrypt.org"
  spf: true
  dmarc: true
  dmarc_policy: reject
- domain: steam-api.com
  dnssec: false
  caa:
  - 0 iodef "mailto:ssl-abuse@valvesoftware.com"
  - 0 issue "digicert.com"
  - 0 issue "letsencrypt.org"
  spf: true
  dmarc: true
  dmarc_policy: reject