United States National Library of Medicine · Domain Security

United States National Library Of Medicine Domain Security

Domain security

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

Federal GovernmentBiomedical ResearchHealthcareGenomicsLiterature

Transport & Host Security

www.ncbi.nlm.nih.gov
HTTPS: yes · TLS: TLSv1.3 · HSTS: yes · cert expires: Sep 26 14:06:42 2026 GMT
eutils.ncbi.nlm.nih.gov
HTTPS: yes · TLS: TLSv1.3 · HSTS: yes · cert expires: Sep 26 14:06:42 2026 GMT
api.ncbi.nlm.nih.gov
HTTPS: yes · TLS: TLSv1.3 · HSTS: no · cert expires: Sep 26 14:06:42 2026 GMT

Domain (DNS/Email) Security

nih.gov
DNSSEC: yes · SPF: no · DMARC: yes (p=reject) · CAA: yes

Source

Domain Security

Raw ↑ 
generated: '2026-07-11'
method: probed
source: live DNS/TLS/HTTP probes of apis.yml + OpenAPI hosts
hosts:
- host: www.ncbi.nlm.nih.gov
  https: true
  tls_version: TLSv1.3
  cert_expires: Sep 26 14:06:42 2026 GMT
  hsts: true
  hsts_max_age: 31536000
- host: eutils.ncbi.nlm.nih.gov
  https: true
  tls_version: TLSv1.3
  cert_expires: Sep 26 14:06:42 2026 GMT
  hsts: true
  hsts_max_age: 31536000
- host: api.ncbi.nlm.nih.gov
  https: true
  tls_version: TLSv1.3
  cert_expires: Sep 26 14:06:42 2026 GMT
  hsts: null
domains:
- domain: nih.gov
  dnssec: true
  caa:
  - 0 issue "letsencrypt.org"
  - 0 issue "digicert.com"
  - 0 issue "amazon.com"
  - 0 issue "sectigo.com"
  - 0 issue "entrust.net"
  - 0 issue "godaddy.com"
  spf: false
  dmarc: true
  dmarc_policy: reject