hedgedoc-mcp-server

hedgedoc-mcp-server

Enables creating, reading, and managing HedgeDoc 1.x notes and Mermaid diagrams from AI agents via the MCP protocol.

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README

HedgeDoc MCP Server

MCP server for HedgeDoc 1.x — the open-source collaborative markdown editor. Create notes and Mermaid diagrams from OpenCode and other MCP-compatible AI agents.

Note: This is built for HedgeDoc 1.x (formerly CodiMD). It uses the HedgeDoc 1.x API, which differs from HedgeDoc 2.

Tools

Tool Description
hedgedoc_create_blank Create a blank note with the instance's default template
hedgedoc_create Create a new note with a random ID
hedgedoc_create_with_alias Create a new note with a custom URL alias (requires FreeURL mode)
hedgedoc_create_diagram Create a note with a Mermaid diagram
hedgedoc_read Read the raw markdown content of a note
hedgedoc_info Get note metadata (title, description, timestamps, viewcount)
hedgedoc_list_revisions List all available revisions of a note
hedgedoc_get_revision Get the full content of a specific revision
hedgedoc_publish_url Get the published (read-only) URL of a note
hedgedoc_slide_url Get the slide presentation URL of a note
hedgedoc_status Get the current status of the HedgeDoc instance

Usage

export HEDGEDOC_URL="https://hedgedoc.your-instance.com"
uvx hedgedoc-mcp-server stdio

HedgeDoc 1.x does not use API tokens for note operations. Authentication is handled via session cookies (browser) or instance configuration (see Production Ready guide).

OpenCode config

{
  "mcp": {
    "hedgedoc": {
      "type": "local",
      "enabled": true,
      "command": ["uvx", "hedgedoc-mcp-server", "stdio"],
      "environment": {
        "HEDGEDOC_URL": "https://hedgedoc.your-instance.com"
      }
    }
  }
}

Requirements

Requirement Notes
HedgeDoc 1.x instance Tested on 1.x. Not compatible with HedgeDoc 2.
Python 3.11+
uv (recommended) Or pip install hedgedoc-mcp-server

API Endpoints Used

This server uses the following HedgeDoc 1.x API endpoints:

Method Endpoint Used by
GET /new Create a blank note
POST /new Create a note (random ID)
POST /new/{alias} Create a note (custom alias)
GET /{id}/download Read raw markdown
GET /{id}/info Read metadata
GET /{id}/revision List revisions
GET /{id}/revision/{rev} Get specific revision
GET /{id}/publish Published URL
GET /{id}/slide Slide URL
GET /status Instance status

For more details, see the official API docs.

Instance Configuration

Your HedgeDoc administrator may need to configure these settings:

Setting Impact Docs
CMD_ALLOW_ANONYMOUS=true Allows note creation without login Users and Privileges
CMD_ALLOW_FREEURL=true Enables custom URL aliases Users and Privileges
CMD_RATE_LIMIT_NEW_NOTES=20 Max new notes per 5 minutes (default: 20) Web Security
CMD_DOCUMENT_MAX_LENGTH=100000 Max note length in chars (default: 100k) HedgeDoc basics
CMD_DISABLE_NOTE_CREATION=false If true, no notes can be created Users and Privileges

Development

git clone https://github.com/Jyzus/kaymer-hedgedoc-mcp
cd kaymer-hedgedoc-mcp
uv venv && uv pip install -e .
HEDGEDOC_URL="https://hedgedoc.your-instance.com" uv run hedgedoc-mcp-server

License

MIT

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