Substack (substack)

Substack is a newsletter publishing platform. It does not document a public REST API; integrations are limited to RSS feeds, email-based posting, and unofficial endpoints.

URL: Visit APIs.json URL

Run: Capabilities Using Naftiko

Type

• x-type: company

Tags

• Newsletters, Publishing

Timestamps

• Created: 2026-05-08
• Modified: 2026-05-08

APIs

• Substack RSS Feeds — Public RSS feeds at /feed for each publication, used for syndication and read access.
• Substack Internal/Unofficial API — Undocumented JSON endpoints used by the Substack web app; not officially supported and subject to change.

Common Properties

• Website
• Plans — placeholder, pipeline reconciles later
• RateLimits — placeholder
• FinOps — FOCUS-aligned placeholder

Documentation

• Developer Docs

Maintainers

FN: Kin Lane

Email: kin@apievangelist.com