FastMCP Server For Substack — Publish Notes And Posts, Pull Analytics, Manage Dr
Publish Substack Notes and posts, manage drafts, and pull analytics from your agent without clicking through the web editor for every ship.
Overview
substack-mcp is a MCP server for the Launch phase that lets agents publish Substack content, manage drafts, and fetch analytics via FastMCP.
What is this MCP server?
- FastMCP-based Substack server for Notes, posts, drafts, and analytics
- Pluggable architecture noted in registry description for extending workflows
- Auth via SUBSTACK_SID_COOKIE extracted with browser dev tools
- v0.1.0 stdio .mcpb bundle for standard MCP clients
- Supports solo-builder content flywheel: draft in agent, publish, read performance
- Server version 0.1.0 distributed as stdio .mcpb via GitHub releases
- 1 required secret: SUBSTACK_SID_COOKIE for Substack session auth
- Registry title cites 4 capability areas: Notes, posts, analytics, and draft management (plus pluggable extensions)
Community signal: 1 GitHub stars.
What problem does it solve?
Indie founders stall Launch because Substack publishing and stats live in a separate browser tab from where they write and ship product.
Who is it for?
Solo builders running a Substack as their primary distribution layer who want agent-assisted publishing and performance checks.
Skip if: Creators on Ghost, Beehiiv, or pure SEO landing pages who do not use Substack session auth.
What do I get? / Deliverables
After you register substack-mcp, your agent can draft, publish Notes or posts, and pull Substack analytics without manual dashboard hopping.
- Agent-driven Substack Notes and post publishing workflows
- Draft management without leaving the coding environment
- Analytics pulls to inform Launch and Grow content iterations
Recommended MCP Servers
Journey fit
Substack actions are Launch distribution—getting words and updates in front of an audience—while analytics loops back in Grow. Distribution is the canonical shelf for publishing channels, newsletters, and Notes that announce what you built.
How it compares
Substack-specific publishing MCP, not a general CMS skill or social scheduler for every network.
Common Questions / FAQ
Who is substack-mcp for?
Solo builders and newsletter operators using Claude Code, Cursor, or Codex who publish on Substack and want MCP-driven drafts, posts, Notes, and analytics.
When should I use substack-mcp?
Use it at Launch when you distribute updates, essays, or Notes—and in Grow when you review post analytics and iterate content with your agent.
How do I add substack-mcp to my agent?
Log into Substack, extract SUBSTACK_SID_COOKIE via browser dev tools, install v0.1.0 .mcpb, add the cookie as a secret in MCP config, and enable the stdio server.