MCP server

Substack by Cotlet

dev.cotlet/substack

Checked 25 Oct 2026, 20:29 UTC · It answered and asked for a sign-in

Posts, Notes, messages, subscribers and stats for your publication.

Needs a sign-in or keyVerified publisher: cotlet.dev

https://cotlet.dev/mcp/v1/substack/connect

At a glance

Type: MCP server
Publisher: cotlet.dev (verified by the MCP Registry)
Status: Needs a sign-in or key
Sets up in: Claude Code, Claude Desktop, Codex, Gemini CLI, Cursor, VS Code, Antigravity, ChatGPT, OpenAI API, Grok
Last checked: 25 Oct 2026, 20:29 UTC

Opens the app, which shows the server and asks you to confirm. For other apps, copy the setup below.

Claude Code

claude mcp add --transport http substack https://cotlet.dev/mcp/v1/substack/connect

Claude Desktop

Settings → Connectors → Add custom connector, and paste the URL.

Codex (config.toml)

[mcp_servers.substack]
url = "https://cotlet.dev/mcp/v1/substack/connect"

Gemini CLI

{"mcpServers":{"substack":{"httpUrl":"https://cotlet.dev/mcp/v1/substack/connect"}}}

Cursor

{"mcpServers":{"substack":{"url":"https://cotlet.dev/mcp/v1/substack/connect"}}}

VS Code

{"servers":{"substack":{"type":"http","url":"https://cotlet.dev/mcp/v1/substack/connect"}}}

Antigravity

agy mcp add substack https://cotlet.dev/mcp/v1/substack/connect

ChatGPT

Settings → Apps & Connectors → Advanced settings: turn on Developer mode, then Create a connector and paste the URL. Which plans can do this varies.

OpenAI API (Responses tools)

{"type":"mcp","server_label":"substack","server_url":"https://cotlet.dev/mcp/v1/substack/connect","require_approval":"always"}

Grok (xAI API tools)

{"type":"mcp","server_label":"substack","server_url":"https://cotlet.dev/mcp/v1/substack/connect"}

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