Write
Create drafts, set structured post bodies with headings, lists, code blocks, images and paywalls. Update metadata, publish with email control, upload images.
Gives an AI assistant full access to a Substack publication: drafts, publish, subscribers, analytics, tags, comments, Notes, and the reader feed. Session cookie auth, deployed on Vercel.
Point any MCP client at this endpoint. No authentication needed on the client side: credentials live server-side in environment variables.
https://substack.pmcosta.dev/mcpCreate drafts, set structured post bodies with headings, lists, code blocks, images and paywalls. Update metadata, publish with email control, upload images.
Headline stats, 16 analytics reports, per-post metrics across 43 fields, subscriber filtering with 48 columns and 18 operators, full CSV export.
Your inbox, the Notes feed, any post in full from any publication, comment threads, profile feeds, subscriptions, tags, and restacks.
| Property | Value |
|---|---|
| 27 | Tools: drafts, publish, subscribers, analytics, tags, comments, Notes, reader, images, restacks |
| Cookie | Server-side session cookie auth. No client credentials needed. |
| Streamable | MCP transport over HTTP, stateless, no persistent process |
| 48 | Subscriber columns: filter, sort, search, and export with 18 operators |
| 16 | Analytics reports: retention, churn, growth, referrals, ARR, overlap, and more |
| MIT | Based on marcomoauro/substack-mcp, rewired for Vercel |