Substack Posting MCP
About
Move your blog to Substack Newsletter in few clikcs
Details
- Author
- alxgntv
- Categories
- Marketing, Other
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Setup
Install Substack Posting MCP in your MCP client (Claude Desktop, Cursor, Windsurf, and others).
Repository: https://github.com/alxgntv/substack-api-mcp
Follow the installation instructions in the repository README, then restart your MCP client.
Substack doesnotprovide a native public API for publishing posts.
But authors who want to draft, publish, and schedule from AI agents (Cursor, Claude, and other MCP hosts) still need a way out.This is the MCP server to publish to Substack via any agent.
Will not start without a validAPISUBSTACK_API_KEY(ask_*). Get API key here:apisubstack.com.
cd /path/to/Substack-API-MCP python3 -m venv .venv source .venv/bin/activate pip install -e .
export APISUBSTACK_API_KEY="ask_YOUR_KEY" export SUBSTACK_PUBLICATION_URL="https://yourname.substack.com" export SUBSTACK_SID="YOUR_SUBSTACK_SID_VALUE" # optional # export SUBSTACK_USER_ID="123456"
substack-api-mcp # or python -m substack_api_mcp
{ "mcpServers": { "substack-api": { "command": "/ABSOLUTE/PATH/TO/Substack-API-MCP/.venv/bin/substack-api-mcp", "args": [], "env": { "APISUBSTACK_API_KEY": "ask_YOUR_KEY", "SUBSTACK_PUBLICATION_URL": "https://yourname.substack.com", "SUBSTACK_SID": "YOUR_SUBSTACK_SID_VALUE" } } } }
Use absolute paths. Restart the host after config changes.
Attribution-or-Royalty(source available). SeeLICENSEandCOMMERCIAL_LICENSE.md.
- Non-commercial use: allowed (keep copyright + license notice).
- Commercial use: eithervisible attributioneverywhere the software is used,ora paidroyalty / commercial licenseviaapisubstack.com.
Use at your own risk. Not affiliated with Substack. Built so authors can publish through their agents when Substack itself does not offer a native publishing API.
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