generated: '2026-08-13'
method: searched
source: https://substack.com/changelog
scheme: dated-product-notes
current_version: null
note: >-
  Substack maintains a page it calls "Recent changes" at https://substack.com/changelog
  (HTTP 200, title "Changelog"), described on the page as "a running list of notable
  product changes happening at Substack". It is a product changelog, not an API
  changelog — there is no per-version entry, no breaking-change marker and no API
  surface named anywhere on it. The entries the server renders are also stale: the most
  recent items served to a non-JavaScript client are dated 5-6 years ago and link to
  blog.substack.com posts. Substack's live product announcements are published to the
  blog at https://on.substack.com/ instead. Neither the Developer API (Jan 2026 terms)
  nor the MCP server (Aug 2026 docs) has an entry.
scope: product
api_changelog_published: false
entries:
  - date: null
    relative_date: 5 years ago
    category: Product Release
    highlights:
      - New and improved Subscribers dashboard
    link: https://blog.substack.com/p/new-better-analytics-for-your-subscribers
    breaking: false
  - date: null
    relative_date: 6 years ago
    category: Product Release
    highlights:
      - New publication theming and appearance customization options
    link: https://blog.substack.com/p/new-publication-themes
    breaking: false
  - date: null
    relative_date: 6 years ago
    category: Product Release
    highlights:
      - Homepage discovery revamp with category lists and a Featured section
      - Beta release of Substack Reader
    link: https://blog.substack.com/p/new-reader-homepage
    breaking: false
related:
  blog: https://on.substack.com/
  blog_feed: https://on.substack.com/feed
  status_incidents: https://status.substack.com/history
x-evidence:
  - fetched: '2026-08-13'
    url: https://substack.com/changelog
    http_status: 200
    content_type: text/html
    note: >-
      Entry dates are rendered as relative strings ("5 years ago") in the server HTML
      with no machine-readable date attribute, so absolute dates are recorded as null
      rather than computed.