What can you do with this server?

With this server, you can interact with Mastodon by creating and managing toots with various customizable options: * Create and publish text content as toots * Customize visibility (public, unlisted, private, or direct) * Mark content as sensitive with a boolean parameter * Add spoiler warnings/text before toot content * Attach media files (images, videos, audio) * Provide alt text for media attachments * Schedule toots for future posting using ISO 8601 datetime format

Which integrations are available for this server?

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](/mcp/servers/integrations/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

Related MCP server: MCP Filesystem Server

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