presskit-mcp
Click on "Install Server".
Wait a few minutes for the server to deploy. Once ready, it will show a "Started" state.
In the chat, type
@followed by the MCP server name and your instructions, e.g., "@presskit-mcppublish my markdown file to Medium as a draft"
That's it! The server will respond to your query, and you can continue using it as needed.
Here is a step-by-step guide with screenshots.
presskit-mcp
A Python FastMCP server and CLI for publishing to Medium and Substack.
Stability warning: Both integrations rely on unofficial/deprecated access paths. Medium's REST API is frozen (no new tokens issued). Both platforms' internal endpoints are undocumented and may change without notice.
Install
pip install -e .This installs two commands:
presskit— CLI for direct publishing from the terminalpublishing-mcp— MCP server for use with Claude Desktop/Claude Code
Related MCP server: substack-mcp
CLI Usage (presskit)
Publish a markdown file
# Publish to Medium as a draft
presskit publish medium --file docs/drafts/my-article.md
# Publish to Substack as a draft
presskit publish substack --file docs/drafts/my-article.md
# Publish to both platforms at once
presskit publish both --file docs/drafts/my-article.md
# Publish live (not draft)
presskit publish medium --file article.md --status public --tags "python,automation"
# Substack: publish to web only (no subscriber email)
presskit publish substack --file article.md --status public --no-emailThe CLI reads YAML frontmatter from the markdown file:
---
title: "My Article Title"
subtitle: "Optional subtitle for Substack"
tags: [python, automation, infrastructure]
---
# My Article Title
Article body here...If no frontmatter title is present, the first # Heading is used.
List posts
# List your Medium posts
presskit list medium --username alexander.g.moore1
# List Substack posts
presskit list substack --subdomain alexgmoore
# List Substack drafts
presskit drafts substackCLI options reference
presskit publish <platform> [options]
--file, -f Markdown file to publish (required)
--status, -s draft | public | unlisted (default: draft)
--tags, -t Comma-separated tags, e.g. "python,devops" (Medium)
--subtitle Post subtitle (Substack)
--no-email Publish to web only, skip subscriber email (Substack)
presskit list <platform> [options]
--username, -u Medium username without @ (Medium)
--subdomain, -d Substack subdomain (Substack)
--limit, -n Max results (default: 10)
presskit drafts substackMCP Server Usage
Run the server
# Direct
python server.py
# Or via installed entry point
publishing-mcpAdd to Claude Code (project-level)
Create .claude/mcp.json in your project:
{
"mcpServers": {
"publishing": {
"command": "python3",
"args": ["/absolute/path/to/presskit-mcp/server.py"],
"env": {
"MEDIUM_SESSION_COOKIE": "your_sid_cookie",
"MEDIUM_AUTH_STATE_FILE": "/path/to/medium-auth.json",
"SUBSTACK_EMAIL": "you@example.com",
"SUBSTACK_PASSWORD": "your_substack_password",
"SUBSTACK_PUBLICATION_URL": "https://yourpub.substack.com"
}
}
}
}Add to Claude Desktop
Edit ~/Library/Application Support/Claude/claude_desktop_config.json (Mac):
{
"mcpServers": {
"publishing": {
"command": "python",
"args": ["/absolute/path/to/presskit-mcp/server.py"],
"env": {
"MEDIUM_SESSION_COOKIE": "your_sid",
"MEDIUM_AUTH_STATE_FILE": "/path/to/medium-auth.json",
"SUBSTACK_EMAIL": "you@example.com",
"SUBSTACK_PASSWORD": "your_password",
"SUBSTACK_PUBLICATION_URL": "https://yourpub.substack.com"
}
}
}
}Restart Claude Desktop/Code after adding the config.
FastMCP Development & Testing
presskit-mcp is built on FastMCP. Here's how to work with it during development.
Inspect tools interactively
The MCP Inspector opens a browser UI where you can call any tool, see inputs/outputs, and debug:
# Using the mcp CLI (installed with mcp[cli])
mcp dev server.pyThis starts the server and opens an interactive inspector at http://localhost:5173. You can:
Browse all 15 registered tools
Fill in parameters and execute them
See JSON responses in real-time
Test error handling
Run the server with stdio transport (default)
# FastMCP defaults to stdio transport (what Claude Desktop/Code expects)
python server.pyRun with SSE transport (for remote/HTTP access)
# Start as an HTTP server on port 8000
mcp run server.py --transport sse --port 8000Then connect from any MCP client using http://localhost:8000/sse.
Call a tool directly via mcp call
# One-shot tool invocation without starting a persistent server
echo '{"username": "alexander.g.moore1", "limit": 5}' | \
mcp call server.py medium_list_postsList all registered tools
mcp tools server.pyEnvironment variables for testing
# Medium (session-based — no integration token needed)
export MEDIUM_SESSION_COOKIE="your_sid_value"
export MEDIUM_AUTH_STATE_FILE="/path/to/medium-auth.json"
# Medium (REST API — only if you have an existing token)
export MEDIUM_INTEGRATION_TOKEN="your_token"
# Substack
export SUBSTACK_EMAIL="you@example.com"
export SUBSTACK_PASSWORD="your_password"
export SUBSTACK_PUBLICATION_URL="https://yourpub.substack.com"Running tests
python3 -m unittest discover -s tests -vTests use sys.modules patching to stub third-party deps — no external services needed.
Tools Reference
Medium (6 tools)
Tool | Auth | Method |
| Integration token | REST API |
| Integration token | REST API |
| Integration token | REST API |
| Session cookie | GraphQL + Delta OT |
| Session cookie | Unofficial GraphQL |
| Session cookie | Unofficial GraphQL |
Substack (9 tools)
Tool | Auth | Method |
| Email/password or cookie | python-substack |
| Email/password or cookie | python-substack |
| None (public) | Raw HTTP |
| None (public) | Raw HTTP |
| None (public) | Raw HTTP |
| Email/password or cookie | python-substack |
| Email/password or cookie | python-substack |
| Email/password or cookie | python-substack |
| Email/password or cookie | python-substack |
Credentials
Medium session cookie
Medium no longer issues API tokens. The session-based tools use browser cookies:
Log in to medium.com in a browser
Extract the
sidcookie from DevTools → Application → CookiesFor full functionality, save the complete browser state with
playwright-cli state-save medium-auth.jsonand setMEDIUM_AUTH_STATE_FILE
Substack
Use your Substack email and password directly. If your account uses magic links only:
Sign out of Substack
Click "Sign in with password"
Click "Set a new password"
Architecture
presskit-mcp/
├── server.py # FastMCP server entry point (15 tools)
├── cli.py # CLI entry point (presskit command)
├── medium/
│ ├── client.py # REST API + GraphQL + Delta OT HTTP layer
│ └── tools.py # 6 MCP tools with Pydantic input models
├── substack/
│ ├── client.py # python-substack wrapper + raw HTTP
│ └── tools.py # 9 MCP tools with Pydantic input models
├── tests/
│ └── test_static.py # Unit tests (no external deps needed)
├── pyproject.toml # pip installable, entry points
└── config.yaml # Credential reference (not loaded by code)How Medium session publishing works
Medium's web editor saves content via a delta-based Operational Transform system — not GraphQL or REST. The medium_create_post_session tool replicates this:
GraphQL
createPost→ creates an empty draft, returnspost_idPOST /p/{post_id}/deltas→ writes title + paragraphs as OT deltasGraphQL
setPostTags→ sets up to 5 tagsGraphQL
publishPost→ publishes (optional)
This was discovered by decompiling Medium's Android APK and capturing network traffic from the web editor.
Known limitations
Medium session cookies expire — you'll need to refresh
medium-auth.jsonperiodically (re-login via browser)Medium REST API — No new integration tokens. Only existing holders can use
medium_create_postMedium inline formatting — Bold/italic markup positions in the delta API need accurate character offsets; the current markdown parser sends plain text paragraphs
Substack — No official API. All endpoints are reverse-engineered. Keep requests under 1/sec
Images — Neither platform supports programmatic inline image upload via these tools yet
This server cannot be installed
Maintenance
Resources
Unclaimed servers have limited discoverability.
Looking for Admin?
If you are the server author, to access and configure the admin panel.
Related MCP Servers
- AlicenseCqualityDmaintenanceAn MCP server that converts Markdown content to Notion API-compatible formats, suitable for content management and development integration.Last updated11Apache 2.0
- AlicenseAqualityBmaintenanceMCP server for Substack that lets Claude Code create drafts, upload images, set cover thumbnails, schedule, and publish posts on your Substack publication.Last updated1114MIT
- Flicense-qualityDmaintenanceAn MCP server that formats and syndicates Markdown content to Twitter/X, Threads, and a static blog on S3, with automatic thread splitting and preview capabilities.Last updated
- Alicense-qualityDmaintenanceThe Universal MCP Server exposes tools for automated posting and draft saving to note.com. It reads Markdown files containing titles, body text, and tags, then publishes them to your note.com account using Playwright automation.Last updated137MIT
Related MCP Connectors
Markdown-first MCP server for Notion API with 8 composite tools and 39 actions.
A MCP server built for developers enabling Git based project management with project and personal…
A basic MCP server to operate on the Postman API.
Latest Blog Posts
- Who's Calling? MCP Hosts Are an Identity Blind Spot (And the Spec Knows It)By Om-Shree-0709 on .mcpAgent IdentityOAuth 2.1
- Your AI Chatbot Just Exposed Your CEO's Salary to an InternBy Om-Shree-0709 on .Agent IdentityMCP SecurityOAuth Delegation
- Why MCP Servers Need Execution Sandboxing (And Why Your Current Stack Isn't Enough)By Om-Shree-0709 on .Agentic AiPrompt InjectionWebAssembly
MCP directory API
We provide all the information about MCP servers via our MCP API.
curl -X GET 'https://glama.ai/api/mcp/v1/servers/almoore/presskit-mcp'
If you have feedback or need assistance with the MCP directory API, please join our Discord server