MCP server for Substack with Streamable HTTP transport, deployed on Vercel.
27 tools: drafts, publish, subscribers, analytics, tags, comments, Notes, reader feed, and more.
Or import at vercel.com/new and set these env vars:
| Variable | Description |
|---|---|
SUBSTACK_PUBLICATION_URL |
e.g. https://yourname.substack.com |
SUBSTACK_SESSION_TOKEN |
Your substack.sid cookie from browser devtools |
SUBSTACK_USER_ID |
Your numeric Substack user ID |
POST https://your-domain.vercel.app/mcp
Streamable HTTP transport, no client auth required (credentials live server-side in env vars).
| Tool | Description |
|---|---|
create_draft_post |
Create a draft from title, subtitle and plain-text body |
set_post_body |
Replace a draft's body with structured content |
update_draft |
Change title, subtitle and 9 Post settings |
get_draft |
Read one draft in full |
list_posts |
List drafts, published or scheduled posts |
publish_draft |
Publish a draft, with email control |
delete_draft |
Delete an unpublished draft |
upload_image |
Re-host an image on Substack's CDN |
list_subscribers |
List and filter subscribers (48 columns, 18 operators) |
export_subscribers |
Export subscribers with engagement metrics |
get_publication |
Read publication settings |
get_user_profile |
Read your account and publications |
get_publication_stats |
Headline stats |
get_post_stats |
Rank posts by 43 per-post metrics |
get_analytics |
16 publication-level reports |
list_publication_tags |
List tags |
get_post_tags |
Tags on one post |
add_tag_to_post |
Tag a post |
get_post_comments |
Read comments |
comment_on_post |
Post a comment |
list_subscriptions |
What you subscribe to |
list_reader_posts |
Your inbox |
get_reader_post |
Read any post in full |
get_reader_feed |
Notes feed |
get_profile_feed |
One account's published Notes and posts |
get_comment_thread |
A Note and its replies |
restack_item |
Restack a Note |
All 27 tools and the Substack API layer are from marcomoauro/substack-mcp (MIT). This repo rewires the transport from stdio to Streamable HTTP for Vercel deployment.
MIT