aid: substack
url: https://raw.githubusercontent.com/api-evangelist/substack/refs/heads/main/apis.yml
name: Substack
x-type: company
description: Substack is a publishing platform for newsletters and podcasts with built-in subscription billing, paid posts,
  chat, video, and recommendations.
image: https://kinlane-productions.s3.amazonaws.com/apis-json/apis-json-logo.jpg
tags:
- Newsletter
- Creator
- Email
- Subscription
- Publishing
created: '2026-05-08'
modified: '2026-05-08'
specificationVersion: '0.19'
apis:
- name: Substack RSS Feeds
  description: Public RSS feeds at /feed for each publication, used for syndication and read access.
  humanURL: https://substack.com/help/rss
  baseURL: https://<publication>.substack.com
  tags:
  - RSS
  - Read-Only
  - Unofficial
  properties:
  - type: Documentation
    url: https://substack.com/help/rss
- name: Substack Internal/Unofficial API
  description: Undocumented JSON endpoints used by the Substack web app; not officially supported and subject to change.
  humanURL: https://substack.com/
  baseURL: https://substack.com/api/v1
  tags:
  - Unofficial
  - Undocumented
  properties:
  - type: Documentation
    url: https://substack.com/
common:
- type: Website
  url: https://substack.com/
- type: Plans
  url: plans/substack-plans-pricing.yml
- type: RateLimits
  url: rate-limits/substack-rate-limits.yml
- type: FinOps
  url: finops/substack-finops.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com