How to post newsletter to Substack via Claude Code

How to post newsletter to Substack via Claude Code

Substack does not ship an official public posting API. API Substack gives authors an unofficial way to post newsletter to Substack via Claude Code.

Connect Claude Code to our MCP/API so Claude can post on your behalf.

Steps

1) Register on API Substack (required). 2) Generate your API key. 3) Connect your Substack publication. 4) post newsletter through Claude Code using that key.

You must create an account to receive an API key. Without registration, posting via API Substack will not work.