generated: '2026-08-08'
method: probed
source: live DNS/TLS/HTTP probes of apis.yml + discovered BookNook hosts
hosts:
- host: www.booknook.com
  role: marketing site
  https: true
  tls_version: TLSv1.3
  cert_expires: Oct 14 06:08:31 2026 GMT
  hsts: true
  hsts_max_age: 31536000
- host: api.booknooklearning.com
  role: production API service
  https: true
  tls_version: TLSv1.3
  cert_expires: Jan  8 23:59:59 2027 GMT
  hsts: true
  hsts_max_age: 31536000
  hsts_preload: true
  hsts_include_subdomains: true
  response_headers:
    x-content-type-options: nosniff
    x-frame-options: SAMEORIGIN
    referrer-policy: no-referrer
    content-security-policy: present
- host: app.booknooklearning.com
  role: student/tutor single-page application
  https: true
  tls_version: TLSv1.3
  cert_expires: Jan  8 23:59:59 2027 GMT
  hsts: true
  hsts_max_age: 31536000
- host: help.booknook.com
  role: customer help center
  https: true
  tls_version: TLSv1.3
  cert_expires: Oct 18 05:15:26 2026 GMT
  hsts: false
domains:
- domain: booknook.com
  dnssec: false
  caa: []
  spf: true
  dmarc: true
  dmarc_policy: quarantine
- domain: booknooklearning.com
  dnssec: false
  caa: []
  spf: true
  dmarc: true
  dmarc_policy: quarantine
notes:
- booknooklearning.com apex fails to serve (525 SSL handshake failure at the edge); www.booknooklearning.com redirects to www.booknook.com.
- No CAA record on either registrable domain, and DNSSEC is not signed on either.
- DMARC is published at p=quarantine on both domains, not p=reject.
- help.booknook.com serves no HSTS header.
- The production API service sets a complete security-header set (CSP, nosniff, SAMEORIGIN, no-referrer) and HSTS with preload.