generated: '2026-08-13'
method: searched
source: https://developers.kit.com/api-reference/overview
versioning:
  scheme: uri-path
  current: v4
  base_url: https://api.kit.com/v4/
  docs: https://developers.kit.com/api-reference/upgrading-to-v4
  history:
  - version: v4
    status: current
    base_url: https://api.kit.com/v4/
    note: Introduced cursor pagination, OAuth apps, bulk/async processing, and a consistent error envelope.
  - version: v3
    status: deprecated
    base_url: https://api.convertkit.com/v3/
    docs: https://developers.kit.com/api-reference/v3/overview
    note: >-
      "API V3 is no longer in active development." Kit's own API overview carries
      the warning that V3 "is still available for use but is deprecated and will
      be sunset in the future." V3 also sits on the pre-rebrand
      api.convertkit.com host; V4 moved to api.kit.com.
deprecation:
  policy_url: https://developers.kit.com/api-reference/upgrading-to-v4
  policy_published: true
  policy_note: >-
    Kit publishes a deprecation POSITION and a full V3->V4 migration guide
    enumerating every changed endpoint, response shape and removed parameter,
    but does NOT publish a dated sunset commitment, a notice period, or a
    written deprecation POLICY document. "Will be sunset in the future" is the
    entirety of the schedule.
  sunset_header: false
  deprecation_header: false
  rfc8594: false
  sunset_date: null
  breaking_change_notice_period: null
deprecated_operations: []
deprecated_operations_note: >-
  No operation in openapi/_original/openapi.json carries `deprecated: true`. The
  deprecation is whole-version (V3), not per-operation, and V3 is not represented
  in this repo's specs.
status_page:
  url: https://status.kit.com
  http_status: 200
  verified: '2026-08-13'
sla:
  url: null
  uptime_target: null
  note: No published SLA or uptime commitment was found on kit.com, developers.kit.com or status.kit.com.
changelog:
  url: https://developers.kit.com/changelog
  artifact: changelog/convertkit-changelog.yml
  product_changelog: https://updates.kit.com/changelog
roadmap:
  url: null
  note: >-
    https://kit.com/roadmap returns 200 but redirects to
    https://updates.kit.com/changelog — a shipped-changes log, not a forward
    roadmap. No Roadmap pointer is emitted; a redirect to a changelog is not a
    roadmap.
data_retention:
  docs: https://developers.kit.com/api-reference/email-data-retention
  note: Account-level email stats expose a rolling last-90-day window via the API.
support:
  developer_community: https://kit.typeform.com/to/f8urvmPe
  email: support@kit.com
  help_center: https://help.kit.com