Substack API MCP

Item: Substack API MCP
Rating: 73
Author: M8ven

Enables AI agents to draft, publish, and schedule posts on Substack, bypassing the lack of an official publishing API.

→ alxgntv/substack-api-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.

🔐

You'll be asked for 1 credential: APISUBSTACK_API_KEY

These are read from process.env at runtime. Make sure you trust where they’ll be sent.

// required environment variables

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

configAPISUBSTACK_API_BASE

🔐 secretAPISUBSTACK_API_KEY— Will not start without a valid (ask_). Get API key here: [apisubstack.com](https://apisubstack.com/).

// 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 3 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/alxgntv-substack-api-mcp-10i5pb)](https://m8ven.ai/mcp/alxgntv-substack-api-mcp-10i5pb)

commit: edfe058b7c2383a65cfcb9c371b11a9f4583ef0e

code hash: 29529deac969a8c351ebe0d590e6bdc7c7ea84a46d545120841650cb63c1bfc0

verified: 7/29/2026, 9:32:12 AM

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