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zaphodsdad

Syncthing MCP Server

by zaphodsdad
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Python
Hybrid

Syncthing MCP Server

A Model Context Protocol (MCP) server for managing and monitoring Syncthing file synchronization instances. Built with FastMCP.

Features

  • 35 tools for complete Syncthing management

  • Multi-instance support - manage multiple Syncthing nodes from one server

  • Three transport modes - streamable-http, SSE, and stdio

  • Async throughout - non-blocking httpx client with connection pooling

Related MCP server: Trakt MCP Server

Quick Start

git clone https://github.com/zaphodsdad/syncthing-mcp.git
cd syncthing-mcp
cp .env.example .env
# Edit .env with your Syncthing instance details
uv sync
uv run syncthing-mcp

Configuration

Single Instance

SYNCTHING_URL=http://localhost:8384
SYNCTHING_API_KEY=your-api-key-here

Multiple Instances

SYNCTHING_INSTANCES=server1|http://host1:8384|key1,server2|http://host2:8384|key2

Server Options

SERVER_HOST=0.0.0.0
SERVER_PORT=8088
TRANSPORT=streamable-http   # streamable-http, sse, or stdio
LOG_LEVEL=INFO

Tools

Monitoring (15 tools, read-only)

Tool

Description

list_instances

List configured instances and check connectivity

get_status

System status: version, uptime, memory usage

get_connections

Device connections with bandwidth and addresses

get_completion

Sync completion % for a folder/device pair

list_folders

All configured folders with labels, paths, types

get_folder_status

Detailed folder sync state, file counts, errors

list_devices

All configured devices with names and addresses

get_device_stats

Per-device stats: last seen, connection duration

get_folder_stats

Per-folder stats: last scan, last synced file

get_errors

Current system errors

get_logs

Recent log entries (filterable by timestamp)

get_pending_devices

Devices requesting to connect

get_pending_folders

Folders offered by remote devices

browse_folder

Browse files/directories within a synced folder

health_check

Quick up/down health check (no auth required)

Actions (8 tools)

Tool

Description

scan_folder

Trigger folder rescan (full or subfolder)

pause_device

Pause syncing with a specific device

resume_device

Resume syncing with a specific device

pause_all

Pause all syncing

resume_all

Resume all syncing

override_folder

Force local state as authoritative (send-only folders)

revert_folder

Revert local changes to match remote (receive-only folders)

clear_errors

Clear system error log

Configuration (12 tools)

Tool

Description

add_folder

Add a new shared folder

update_folder

Modify folder settings

remove_folder

Remove a shared folder (files on disk unchanged)

add_device

Add a new device by ID

update_device

Modify device settings

remove_device

Remove a device

accept_device

Accept a pending device connection

reject_device

Reject a pending device connection

accept_folder

Accept a pending folder share

reject_folder

Reject a pending folder share

get_config

Get full config or a specific section

restart

Restart the Syncthing service

Client Configuration

Claude Desktop

{
  "mcpServers": {
    "syncthing": {
      "command": "npx",
      "args": ["-y", "@anthropic-ai/mcp-remote", "http://your-host:8088/mcp"]
    }
  }
}

Claude Code

claude mcp add syncthing http://your-host:8088/mcp

stdio mode

{
  "mcpServers": {
    "syncthing": {
      "command": "uv",
      "args": ["--directory", "/path/to/syncthing-mcp", "run", "syncthing-mcp"],
      "env": {
        "SYNCTHING_URL": "http://localhost:8384",
        "SYNCTHING_API_KEY": "your-key",
        "TRANSPORT": "stdio"
      }
    }
  }
}

Deployment (systemd)

sudo cp syncthing-mcp.service /etc/systemd/system/
sudo systemctl enable --now syncthing-mcp

Development

uv sync --dev
uv run pytest tests/ -v
uv run ruff check .
uv run ruff format --check .

License

MIT

This server cannot be installed

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maintenance

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