substack-ops MCP

A standalone Substack CLI and 26-tool MCP server that allows IDEs like Cursor to draft replies to Substack posts, notes, and comments. It uses a propose/confirm workflow where the host LLM drafts content, but the user confirms before posting, requiring no AI API keys.

Package and access

Local package with source-attributed installation metadata. Koskamo does not execute packages during review.

Community listingLocal stdioSource reviewed; not executedPublished by 06ketan

Vendor documentation

What you can do with it

List unanswered comments on a specific post
Draft a reply to a specific comment using the host LLM
Post a new note or reply to an existing thread
Search Substack posts and profiles

Source and maintenance

Community listingRegistry 0.3.5

mcp-registry: io.github.06ketan/substack-ops@0.3.5 Source repository Project website

Maintenance checked: Nov 1, 2026, 6:06 AM UTC

Packages and installation

Source-provided package data. Koskamo has not executed or live-probed this package.

substack-ops 0.3.5

pypiuvx

substack-ops package definition

{
  "version": "0.3.5",
  "transport": "stdio",
  "identifier": "substack-ops",
  "runtimeHint": "uvx",
  "registryType": "pypi",
  "registryBaseUrl": "https://pypi.org",
  "packageArguments": [
    {
      "type": "positional",
      "value": "mcp"
    },
    {
      "type": "positional",
      "value": "serve"
    }
  ],
  "environmentVariables": [
    {
      "name": "SUBSTACK_PUBLICATION_URL",
      "description": "Your Substack publication URL (e.g. https://you.substack.com/). Optional if set in ~/.cursor/mcp.json's mcpServers.substack-api.env."
    },
    {
      "name": "SUBSTACK_USER_ID",
      "description": "Your Substack numeric user id. Optional if set in ~/.cursor/mcp.json."
    },
    {
      "name": "SUBSTACK_SESSION_TOKEN",
      "description": "Your Substack session cookie value (the s%3A... string). Required for authenticated calls. Easier path: run `substack-ops auth login --browser chrome` and the cookie is auto-grabbed."
    },
    {
      "name": "SUBSTACK_OPS_MCP_PATH",
      "description": "Override path to the mcp.json file the auth layer reads. Defaults to ~/.cursor/mcp.json."
    },
    {
      "name": "SUBSTACK_OPS_LLM_CMD",
      "description": "Optional: override the host CLI used by the unattended daemon path (default: auto-detect claude / cursor-agent / codex on PATH). Use {prompt} placeholder if your CLI takes the prompt as an arg."
    }
  ]
}

Tools

Reported by the attributed source; not independently observed by Koskamo.

No tool definitions available.

Connect from your client

Each snippet configures the same source-provided package; replace placeholders before use.

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Cursor

Merge this local stdio configuration, replace every placeholder environment value, and restart Cursor. Koskamo has not executed this package.

Cursor configuration

{
  "mcpServers": {
    "substack-ops-mcp": {
      "command": "uvx",
      "args": [
        "substack-ops==0.3.5",
        "mcp",
        "serve"
      ],
      "env": {
        "SUBSTACK_PUBLICATION_URL": "<YOUR_SUBSTACK_PUBLICATION_URL>",
        "SUBSTACK_USER_ID": "<YOUR_SUBSTACK_USER_ID>",
        "SUBSTACK_SESSION_TOKEN": "<YOUR_SUBSTACK_SESSION_TOKEN>",
        "SUBSTACK_OPS_MCP_PATH": "<YOUR_SUBSTACK_OPS_MCP_PATH>",
        "SUBSTACK_OPS_LLM_CMD": "<YOUR_SUBSTACK_OPS_LLM_CMD>"
      }
    }
  }
}

Cline

Merge this local stdio configuration, replace every placeholder environment value, and restart Cline. Koskamo has not executed this package.

Cline configuration

{
  "mcpServers": {
    "substack-ops-mcp": {
      "command": "uvx",
      "args": [
        "substack-ops==0.3.5",
        "mcp",
        "serve"
      ],
      "env": {
        "SUBSTACK_PUBLICATION_URL": "<YOUR_SUBSTACK_PUBLICATION_URL>",
        "SUBSTACK_USER_ID": "<YOUR_SUBSTACK_USER_ID>",
        "SUBSTACK_SESSION_TOKEN": "<YOUR_SUBSTACK_SESSION_TOKEN>",
        "SUBSTACK_OPS_MCP_PATH": "<YOUR_SUBSTACK_OPS_MCP_PATH>",
        "SUBSTACK_OPS_LLM_CMD": "<YOUR_SUBSTACK_OPS_LLM_CMD>"
      }
    }
  }
}

VS Code

Merge this local stdio configuration, replace every placeholder environment value, and restart VS Code. Koskamo has not executed this package.

VS Code configuration

{
  "servers": {
    "substack-ops-mcp": {
      "type": "stdio",
      "command": "uvx",
      "args": [
        "substack-ops==0.3.5",
        "mcp",
        "serve"
      ],
      "env": {
        "SUBSTACK_PUBLICATION_URL": "<YOUR_SUBSTACK_PUBLICATION_URL>",
        "SUBSTACK_USER_ID": "<YOUR_SUBSTACK_USER_ID>",
        "SUBSTACK_SESSION_TOKEN": "<YOUR_SUBSTACK_SESSION_TOKEN>",
        "SUBSTACK_OPS_MCP_PATH": "<YOUR_SUBSTACK_OPS_MCP_PATH>",
        "SUBSTACK_OPS_LLM_CMD": "<YOUR_SUBSTACK_OPS_LLM_CMD>"
      }
    }
  }
}

Claude Desktop

Merge this local stdio configuration, replace every placeholder environment value, and restart Claude Desktop. Koskamo has not executed this package.

Claude Desktop configuration

{
  "mcpServers": {
    "substack-ops-mcp": {
      "command": "uvx",
      "args": [
        "substack-ops==0.3.5",
        "mcp",
        "serve"
      ],
      "env": {
        "SUBSTACK_PUBLICATION_URL": "<YOUR_SUBSTACK_PUBLICATION_URL>",
        "SUBSTACK_USER_ID": "<YOUR_SUBSTACK_USER_ID>",
        "SUBSTACK_SESSION_TOKEN": "<YOUR_SUBSTACK_SESSION_TOKEN>",
        "SUBSTACK_OPS_MCP_PATH": "<YOUR_SUBSTACK_OPS_MCP_PATH>",
        "SUBSTACK_OPS_LLM_CMD": "<YOUR_SUBSTACK_OPS_LLM_CMD>"
      }
    }
  }
}

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