Substack MCP Server

Item: Substack MCP Server
Rating: 69
Author: M8ven

Enables reading from and optionally drafting to a Substack publication via Claude, using unofficial JSON endpoints and RSS feed.

→ thenewrhythm/substack-mcp · listed on glama

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// key findings

✅

No credential exfiltration, no sensitive file access, no obfuscation

Static analysis found nothing flowing your secrets to unexpected places.

✅

Open source with a license and README

Anyone can audit the code, the license is declared, and the publisher documents what it does.

// required environment variables

This server reads these from process.env. You'll be asked to provide them before it can run.

configSUBSTACK_PUBLICATION— keep / SUBSTACK_SID there for local runs instead of

configSUBSTACK_SID— create_draft yes Creates a draft (never publishes). Attaches your author byline. Needs .

// full audit trail

The full breakdown of what we checked, the deductions that landed, the network hosts, the dependency advisories, and concrete fix guidance is available to verified publishers.

// improvement guidance — verified publishers only

We have 5 concrete improvements we can share with the publisher of this MCP. Each comes with specific guidance to raise the trust score.

// embed badge in your README

[![M8ven Score](https://m8ven.ai/badge/mcp/thenewrhythm-substack-mcp-wwulad)](https://m8ven.ai/mcp/thenewrhythm-substack-mcp-wwulad)

commit: f0608d62dd50e9555a938e71f4954ff18489d1c0

code hash: 9c19f146f0b19f212c61bf0949402c35434a931cf7840a095657b9f68c5fbd4c

verified: 7/13/2026, 9:49:58 AM

view raw JSON →