generated: '2026-08-13'
method: searched
source: https://developer.unbounce.com/getting_started/#Versions
note: >-
  Unbounce publishes no dated changelog or release-notes feed for the REST API. The only
  version history on the developer portal is a static section documenting the 0.3 -> 0.4
  break. The one surface that IS versioned and dated is the agent-plugin repository, so
  both are recorded here with their real provenance. Dates below are the dates Unbounce
  states or the dates GitHub records — none are inferred.
surfaces:
- surface: REST API
  scheme: media-type version (application/vnd.unbounce.api.v0.4+json)
  current: '0.4'
  dated_changelog: false
  url: https://developer.unbounce.com/getting_started/#Versions
- surface: MCP server / agent plugin
  scheme: semver
  current: 1.0.320
  dated_changelog: false
  url: https://github.com/unbounce/agent-plugins
  note: No GitHub Releases and no CHANGELOG file; version lives only in plugin.json.
entries:
- version: 1.0.320
  date: '2026-08-11'
  surface: MCP server / agent plugin
  type: additions
  source: https://github.com/unbounce/agent-plugins (repository pushed_at)
  highlights:
  - unbounce-mcp plugin published for Claude Code / Cowork and ChatGPT / Codex
  - 37 MCP tools documented in the published tool reference (generated 2026-08-11T19:16:34Z)
  - Three bundled Agent Skills — mcp-page-authoring, mcp-modernize, mcp-feedback
- version: 1.0.0
  date: '2026-07-27'
  surface: MCP server / agent plugin
  type: additions
  source: https://github.com/unbounce/agent-plugins (repository created_at)
  highlights:
  - Unbounce agent-plugin marketplace repository created
- version: '0.4'
  date: '2018-05'
  surface: REST API
  type: breaking
  source: https://developer.unbounce.com/getting_started/#Versions
  highlights:
  - Version 0.3 retired and no longer accessible as of May 2018
  - Removed the endpoint listing all leads for a given sub-account
  - Property names changed to snake_case (accountId -> account_id)
  - ID fields changed from integer to string
  - page_uuid renamed to page_id
  - Optional properties are omitted rather than nullified
  - Date format standardised to yyyy-MM-dd'T'HH:mm:ss.SSS'Z'
  - Removed internal_page_id from page tests, uuid from sub_accounts, and options from account/sub_account