Fern · Domain Security

Fern Api Domain Security

Domain security

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

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Transport & Host Security

buildwithfern.com
HTTPS: yes · TLS: TLSv1.3 · HSTS: yes · cert expires: Jan 28 23:59:59 2027 GMT
fai.buildwithfern.com
HTTPS: yes · TLS: TLSv1.2 · HSTS: no · cert expires: Apr 12 23:59:59 2027 GMT

Domain (DNS/Email) Security

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

Source

Domain Security

Raw ↑ 
generated: '2026-10-04'
method: probed
source: live DNS/TLS/HTTP probes of apis.yml + OpenAPI hosts
hosts:
- host: buildwithfern.com
  https: true
  tls_version: TLSv1.3
  cert_expires: Jan 28 23:59:59 2027 GMT
  hsts: true
  hsts_max_age: 63072000
- host: fai.buildwithfern.com
  https: true
  tls_version: TLSv1.2
  cert_expires: Apr 12 23:59:59 2027 GMT
  hsts: null
domains:
- domain: buildwithfern.com
  dnssec: false
  caa: []
  spf: true
  dmarc: true
  dmarc_policy: quarantine

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Tools for security posture

4 MCP tools reach this
  • find_securityBrowse and filter every security artifact in the catalog.
  • apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
  • resolveTurn a domain, URL or GitHub org into the provider it belongs to.
  • find_cohortsEvery scored population of providers in the catalog.
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