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
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source: []
  generated: '2026-07-22'
  method: derived
position: Provider
access: 3rd-Party
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/substack.png
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: VulnerabilityDisclosure
  url: security/substack-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/substack-domain-security.yml
- 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