specification: API Commons Lifecycle
specificationVersion: '0.1'
generated: '2026-09-14'
method: probed
source: https://www.frostbank.com/sitemaps/frostbank.xml
provider: Cullen/Frost Bankers
providerId: cullen-frost-bankers
description: >-
  Cullen/Frost Bankers publishes no API lifecycle surface. There is no versioning policy, no deprecation
  or sunset policy, no API changelog or release notes, no SLA, and no status page — because there is no
  public developer API for any of them to describe.
versioning:
  scheme: none
  documented: false
  note: No public API and no versioning policy published.
deprecation_policy:
  published: false
  sunset_header: false
  deprecation_header: false
  note: >-
    RFC 8594 Sunset/Deprecation headers are not applicable — no public API host serves an anonymous
    response to observe them on. api.frostbank.com returns HTTP 403 from Imperva at the root.
status_page:
  published: false
  url: null
  note: >-
    IMPORTANT for future runs — DO NOT credit https://www.frostbank.com/status. It is listed in the
    sitemap and returns HTTP 200, but the body is the Frost Bank marketing homepage, not a status
    dashboard. It is a soft-404 and no StatusPage pointer is wired.
sla:
  published: false
  note: Service levels for commercial/treasury integrations are set in the customer agreement, not published.
changelog:
  published: false
  note: >-
    https://www.frostbank.com/newsroom (HTTP 200) carries corporate press releases and
    https://www.frostbank.com/investor-relations/cfr-news carries CFR investor news. Neither is an API
    changelog and neither is wired as a ChangeLog pointer.
deprecated_operations: []
evidence:
  - url: https://www.frostbank.com/status
    status: 200
    finding: soft-404 — returns the marketing homepage, not a status page
  - url: https://www.frostbank.com/sitemaps/frostbank.xml
    status: 200
    finding: 320 URLs, zero developer/API/docs pages
  - url: https://api.frostbank.com/
    status: 403
    finding: Imperva-fronted; no anonymous surface to observe lifecycle headers on
maintainers:
  - FN: Kin Lane
    email: kin@apievangelist.com