generated: '2026-07-27'
method: probed
source: live DNS/TLS/HTTP probes of apis.yml + OpenAPI hosts
hosts:
- host: www.nyiso.com
  https: true
  tls_version: TLSv1.3
  cert_expires: Nov  8 11:51:20 2026 GMT
  hsts: true
  hsts_max_age: 31536000
- host: mis.nyiso.com
  https: true
  tls_version: TLSv1.3
  cert_expires: Oct 31 13:31:01 2026 GMT
  hsts: false
- host: oasis.nyiso.com
  https: true
  tls_version: TLSv1.3
  cert_expires: Sep 23 12:41:13 2026 GMT
  hsts: false
- host: api.nyiso.com
  https: true
  tls_version: TLSv1.3
  tls_versions_accepted: [TLSv1.2, TLSv1.3]
  cert_expires: Sep 23 12:41:13 2026 GMT
  hsts: false
  server: awselb/2.0
  note: >-
    Added by hand on 2026-07-27 - the script probes apis.yml Website/Portal and
    OpenAPI servers[] hosts, and this repo has no OpenAPI, so the API hosts were
    not covered. Anonymous root returns 404; all documented endpoints return 401.
- host: apitest.nyiso.com
  https: true
  tls_version: TLSv1.3
  tls_versions_accepted: [TLSv1.2, TLSv1.3]
  cert_expires: Jan 15 23:59:59 2027 GMT
  hsts: false
  server: awselb/2.0
  note: Market-trial environment; hand-probed 2026-07-27.
- host: oasis-postings.nyiso.com
  https: true
  tls_version: TLSv1.3
  tls_versions_accepted: [TLSv1.2, TLSv1.3]
  cert_expires: Sep 23 12:41:13 2026 GMT
  hsts: false
  server: AmazonS3
  note: Hand-probed 2026-07-27; anonymous ListBucket returns 200 application/xml.
domains:
- domain: nyiso.com
  dnssec: false
  caa: []
  spf: true
  dmarc: true
  dmarc_policy: quarantine