Substack

aid: substack
name: Substack
description: >-
  Substack is an independent newsletter and media platform that lets writers,
  podcasters, video creators, and other culture makers publish directly to
  readers and monetize through paid subscriptions. Founded in 2017 by Chris
  Best (CEO), Jairaj Sethi (CTO), and Hamish McKenzie (CWO) and headquartered
  in San Francisco with a New York City office, Substack provides built-in
  subscription billing, paid posts, podcasting, chat, video, Notes, and a
  cross-publication recommendations network. Creators keep 90 percent of
  subscription revenue (less credit card fees) and own their mailing lists
  and content. The platform reports more than five million paid subscriptions
  and tens of millions of weekly active readers. Substack does not offer a
  general-purpose public REST API for managing publications, posts, or
  subscribers. It does publish a narrowly scoped official Developer API
  (released April 2026) that allows token-authenticated lookup of public
  Substack profiles by LinkedIn handle, gated by an application and
  Terms-of-Use process. Read access to public content is otherwise available
  via per-publication RSS feeds, and the broader integration ecosystem relies
  on reverse-engineered, unofficial JSON endpoints used by the Substack web
  application.
type: Index
position: Provider
access: 3rd-Party
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
tags:
  - Newsletters
  - Publishing
  - Creator Economy
  - Subscriptions
  - Email
  - Podcasting
  - Notes
  - Media
  - Independent Media
  - Paid Content
url: https://raw.githubusercontent.com/api-evangelist/substack/refs/heads/main/apis.yml
created: '2026-05-08'
modified: '2026-05-25'
specificationVersion: '0.20'
apis:
  - name: Substack Developer API
    description: >-
      Narrowly scoped official API that returns public Substack profile data
      for a given LinkedIn handle. Access requires accepting the Developer
      API Terms of Use, applying via form, and generating a token from the
      Developer API section of account settings. Only profiles meeting
      Substack's authenticity thresholds are returned.
    humanURL: https://support.substack.com/hc/en-us/articles/45099095296916-Substack-Developer-API
    baseURL: https://substack.com
    tags:
      - Profile
      - LinkedIn
      - Read-Only
      - Gated
    properties:
      - type: Documentation
        url: https://support.substack.com/hc/en-us/articles/45099095296916-Substack-Developer-API
  - name: Substack RSS Feeds
    description: >-
      Per-publication public RSS feeds available at
      https://{publication}.substack.com/feed for syndication and read-only
      access to posts.
    humanURL: https://support.substack.com/hc/en-us/articles/360037466012
    baseURL: https://{publication}.substack.com
    tags:
      - RSS
      - Read-Only
      - Syndication
    properties:
      - type: Documentation
        url: https://support.substack.com/hc/en-us/articles/360037466012
common:
  - type: Website
    url: https://substack.com/
  - type: About
    url: https://substack.com/about
  - type: Help
    url: https://support.substack.com/
  - type: Blog
    url: https://on.substack.com/
  - type: Pricing
    url: https://substack.com/pricing
  - type: Jobs
    url: https://substack.com/jobs
  - type: Contact
    url: https://substack.com/contact
  - type: TermsOfService
    url: https://substack.com/tos
  - type: PrivacyPolicy
    url: https://substack.com/privacy
  - type: VulnerabilityDisclosure
    url: https://substack.com/vulnerability-disclosure
  - type: GitHubOrganization
    url: https://github.com/substackinc
  - type: LinkedIn
    url: https://www.linkedin.com/company/substack
  - type: Twitter
    url: https://twitter.com/SubstackInc
maintainers:
  - FN: Kin Lane
    email: kin@apievangelist.com