Mastodon MCP

by The-Focus-AI

Verified

Social Media

Overview InspectNew Schema Related Servers Reviews Score

Need Help?View Source Code Report Issue

local-only server

The server can only run on the client’s local machine because it depends on local resources.

Integrations

Used for secure credential management to store and retrieve Mastodon API tokens, ensuring secure access to Mastodon accounts without hardcoding credentials.
Provides tools for posting content to Mastodon, including creating toots with customizable visibility and content warnings, uploading and attaching media files (images, videos, audio), and adding alt text to media attachments.

Mastodon MCP

A Model Context Protocol server that provides tools for interacting with Mastodon. Currently supports creating toots with optional media attachments.

Features

Create toots with customizable visibility and content warnings
Upload and attach media files (images, videos, audio)
Add alt text/descriptions to media attachments
Secure credential management using 1Password CLI

Prerequisites

Node.js 18+
pnpm
1Password CLI (op) installed and configured
A Mastodon account and API access token

Installation

# Clone the repository
git clone [repository-url]
cd mastodon-mcp

# Install dependencies
pnpm install

# Build the project
pnpm build

Configuration

The tool requires a Mastodon API token stored in 1Password. Store your token at:

op://Personal/Floss.Social Key/notesPlain

You can optionally set the Mastodon instance URL via environment variable:

export MASTODON_INSTANCE_URL="https://your.instance.social"

If not set, it defaults to https://floss.social.

Usage

Start the MCP server:

pnpm start

The server exposes a single tool mastodon_create_toot with the following parameters:

content (required): The text content of your toot
visibility: One of "public", "unlisted", "private", or "direct" (default: "public")
sensitive: Boolean flag for sensitive content (default: false)
spoiler_text: Warning text shown before the content (default: "")
media_file: Path to a media file to attach
media_description: Alt text/description for the attached media

Example Usage with MCP Inspector

Start the inspector:

npx @modelcontextprotocol/inspector node dist/mcp-server.js

Open http://localhost:5173 in your browser
Use the tool with parameters like:

{
  "content": "Hello from MCP!",
  "visibility": "public",
  "media_file": "/path/to/image.jpg",
  "media_description": "A beautiful sunset"
}

Development

# Run in development mode with auto-reloading
pnpm dev

# Build the project
pnpm build

# Run the built server
pnpm start

Security

No credentials are hardcoded in the codebase
API tokens are securely stored in and retrieved from 1Password
API responses are git-ignored to prevent accidental credential leaks

License

ISC

This server cannot be installed

-

security - not tested

F

license - not found

-

quality - not tested

A Model Context Protocol server that provides tools for interacting with Mastodon, enabling users to create toots with customizable visibility and attach media files with descriptions.