generated: '2026-07-11'
method: probed
source: live DNS/TLS/HTTP probes of apis.yml + OpenAPI hosts
hosts:
- host: arbitrum.io
  https: true
  tls_version: TLSv1.3
  cert_expires: Oct  1 14:26:32 2026 GMT
  hsts: true
  hsts_max_age: 63072000
- host: portal.arbitrum.io
  https: true
  tls_version: TLSv1.3
  cert_expires: Oct  1 14:26:32 2026 GMT
  hsts: null
- host: docs.arbitrum.io
  https: true
  tls_version: TLSv1.3
  cert_expires: Sep 25 02:59:23 2026 GMT
  hsts: true
  hsts_max_age: 63072000
domains:
- domain: arbitrum.io
  dnssec: true
  caa: []
  spf: true
  dmarc: true
  dmarc_policy: reject