# Substack API MCP

> Substack API MCP — alxgntv-substack-api-mcp. Use this tool when you need to automate publishing on Substack, solving the problem of limited API access for content creation and management. It enables AI agents to draft, publish, and schedule posts, accepting input such as post content and metadata, and producing output such as published posts and scheduling confirmations. Ideal for use cases requiring automated content publishing and management on Substack.

Canonical page: https://skillsregistry.net/skills/alxgntv-substack-api-mcp  
JSON: https://api.skillsregistry.net/v1/skills/alxgntv-substack-api-mcp

## Description

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

## Trust

- **Trust score (0–1):** 0.50
- **Verification tier:** scanned
- **Last scanned:** 2026-08-29

## Facts

- **Version:** 1.0.0
- **Skill type:** atomic
- **Execution layer:** mcp-remote
- **Runtime environment:** api
- **Category:** ai-ml
- **Updated:** 2026-08-29

## Source

- **Source listing:** [Glama](https://glama.ai/mcp/servers/s2uixl5tfg)
- **Repository:** <https://github.com/alxgntv/substack-api-mcp>

## Use it

Resolve this record through the SkillsRegistry MCP server (no auth, read-only):

```
claude mcp add --transport http --scope user skillsregistry https://api.skillsregistry.net/mcp
```

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "get_skill",
    "arguments": {
      "slug": "alxgntv-substack-api-mcp"
    }
  }
}
```

REST: `GET https://api.skillsregistry.net/v1/skills/alxgntv-substack-api-mcp` · pull for local use: `GET https://api.skillsregistry.net/v1/skills/alxgntv-substack-api-mcp/pull`

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SkillsRegistry indexes agent skills from public registries and GitHub. Skills we have analysed are scanned with Circle-IR and scored on six dimensions; each listing states its scan coverage. More: https://skillsregistry.net/llms.txt