generated: '2026-07-11'
method: probed
source: live DNS/TLS/HTTP probes of apis.yml + OpenAPI hosts
hosts:
- host: www.langchain.com
  https: true
  tls_version: TLSv1.3
  cert_expires: Oct  1 02:45:45 2026 GMT
  hsts: false
- host: docs.langchain.com
  https: true
  tls_version: TLSv1.3
  cert_expires: Sep 12 16:49:13 2026 GMT
  hsts: true
  hsts_max_age: 63072000
- host: api.host.langchain.com
  https: true
  tls_version: TLSv1.3
  cert_expires: Sep 23 23:21:48 2026 GMT
  hsts: null
domains:
- domain: langchain.com
  dnssec: true
  caa:
  - 0 issue "pki.goog; cansignhttpexchanges=yes"
  - 0 issue "sectigo.com"
  - 0 issue "amazon.com"
  - 0 issue "letsencrypt.org"
  - 0 issuewild "digicert.com; cansignhttpexchanges=yes"
  - 0 issuewild "pki.goog; cansignhttpexchanges=yes"
  spf: true
  dmarc: true
  dmarc_policy: reject