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Frappe Bench & Site Manager — MCP Server

Manage your local Frappe benches and sites directly from Claude.ai (web + mobile).
Uses FastMCP over HTTP with an Ngrok static tunnel.

📱 Claude.ai  →  🌐 Ngrok (permanent URL)  →  🖥️ MCP Server (localhost:8000)  →  🔧 Frappe Benches

Tools Available

Tool

Category

What it does

bench_restart

Bench Ops

Restart supervisor/bench services

list_sites

Site Management

List benches, sites, apps, status

frappe_api

DocType Data

Authenticated REST API calls

bench_execute

Console

Run Python in Frappe context

get_logs

Logs

Fetch and filter site/bench log files

get_config_overview

Config

Show configured benches (no secrets exposed)


Prerequisites

  • Python 3.10+

  • One or more Frappe benches already set up and working locally

  • ngrok account (free tier works)


Step 1: Install dependencies

git clone <this-repo>
cd frappe-mcp
pip install -r requirements.txt

Step 2: Configure

cp config.example.json config.json

Edit config.json:

{
  "benches": [
    {
      "id": "bench1",
      "label": "Main Dev Bench",
      "path": "/home/youruser/frappe-bench",
      "bench_cmd": "/home/youruser/frappe-bench/env/bin/bench"
    }
  ],
  "site_credentials": {
    "mysite.localhost": {
      "api_key": "YOUR_API_KEY",
      "api_secret": "YOUR_API_SECRET",
      "port": 8000
    }
  }
}

Important: config.json is gitignored — never commit it.


Step 3: Get Frappe API Credentials

For each site you want to access via frappe_api or bench_execute:

  1. Open the Frappe site in your browser

  2. Go to Settings → API Access

  3. Click Generate Keys (for your admin user)

  4. Copy api_key and api_secret into config.json → site_credentials


Step 4: Start the MCP Server

python main.py

You should see:

🚀  Frappe MCP Server starting...
    Benches configured : 1
    Sites with creds   : 1
    Listening on       : http://0.0.0.0:8000
    MCP endpoint       : http://0.0.0.0:8000/mcp
    Audit log          : mcp_audit.log

Step 5: Setup Ngrok (one-time)

Install ngrok

macOS (Homebrew):

brew install ngrok/ngrok/ngrok

Linux:

curl -sSL https://ngrok-agent.s3.amazonaws.com/ngrok.asc | sudo tee /etc/apt/trusted.gpg.d/ngrok.asc >/dev/null
echo "deb https://ngrok-agent.s3.amazonaws.com buster main" | sudo tee /etc/apt/sources.list.d/ngrok.list
sudo apt update && sudo apt install ngrok

Or download directly: https://ngrok.com/download

Add your auth token

ngrok config add-authtoken YOUR_AUTHTOKEN

Get your token from: https://dashboard.ngrok.com/get-started/your-authtoken

Start tunnel with your free static domain

ngrok http 8000 --domain=yourname.ngrok-free.app

Get a free static domain: ngrok Dashboard → Cloud Edge → Domains → New Domain

Your permanent MCP URL becomes:

https://yourname.ngrok-free.app/mcp

Step 6: Connect to Claude.ai

  1. Open claude.aiSettingsIntegrations

  2. Click Add Integration

  3. Enter URL: https://yourname.ngrok-free.app/mcp

  4. Click Add — that's it

Works from your phone and laptop anywhere as long as your laptop is running.


Step 7: Auto-start on Boot (optional)

Linux (systemd)

Create /etc/systemd/system/frappe-mcp.service:

[Unit]
Description=Frappe MCP Server
After=network.target

[Service]
Type=simple
User=youruser
WorkingDirectory=/home/youruser/frappe-mcp
ExecStart=/usr/bin/python3 /home/youruser/frappe-mcp/main.py
Restart=on-failure
RestartSec=5

[Install]
WantedBy=multi-user.target
sudo systemctl daemon-reload
sudo systemctl enable frappe-mcp
sudo systemctl start frappe-mcp

macOS (launchd)

Create ~/Library/LaunchAgents/com.frappe.mcp.plist:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
    <key>Label</key>
    <string>com.frappe.mcp</string>
    <key>ProgramArguments</key>
    <array>
        <string>/usr/bin/python3</string>
        <string>/Users/youruser/frappe-mcp/main.py</string>
    </array>
    <key>WorkingDirectory</key>
    <string>/Users/youruser/frappe-mcp</string>
    <key>RunAtLoad</key>
    <true/>
    <key>KeepAlive</key>
    <true/>
    <key>StandardOutPath</key>
    <string>/Users/youruser/frappe-mcp/mcp_stdout.log</string>
    <key>StandardErrorPath</key>
    <string>/Users/youruser/frappe-mcp/mcp_stderr.log</string>
</dict>
</plist>
launchctl load ~/Library/LaunchAgents/com.frappe.mcp.plist

Running Tests

python test_tools.py

No real Frappe bench needed — all tools are tested with a mock config.


Security Notes

  • config.json is never committed (gitignored)

  • API keys are never exposed in tool responses (get_config_overview shows "configured"/"missing" only)

  • All subprocess calls use shell=False — no shell injection possible

  • bench_execute has a two-tier security scanner: hard blocks and soft warnings

  • Blocked patterns (configurable): DROP, TRUNCATE, os.system, exec(, eval(, etc.

  • Rate limit: 30 requests/minute per IP (configurable)

  • All tool calls are appended to mcp_audit.log


Example Claude Prompts

List all my Frappe sites and their status.

How many NGO records are on site1.localhost in bench1?

Show me the last 50 error log lines for site1.localhost — filter for "PermissionError".

Restart the web worker on bench1.

What's in the mGrant Settings module field for site1.localhost?

Show me all active Grants on site1.localhost with fields name, grant_name, grant_status.

File Structure

frappe-mcp/
├── main.py               # FastMCP server + tool registration
├── config.py             # Config loader + validator + singleton
├── security.py           # Input sanitizer, command blocker, rate limiter
├── logger.py             # Audit logger → mcp_audit.log
├── tools/
│   ├── bench_ops.py      # bench_restart (+ Phase 2 stubs)
│   ├── site_manager.py   # list_sites (+ Phase 2 stub)
│   ├── frappe_api.py     # frappe_api (+ Phase 2 stub)
│   ├── executor.py       # bench_execute
│   └── log_reader.py     # get_logs
├── config.json           # Your config (gitignored)
├── config.example.json   # Template (committed)
├── requirements.txt
├── .gitignore
├── test_tools.py         # Test suite (mock config, no bench needed)
└── README.md

Troubleshooting

config.json not found
→ Run cp config.example.json config.json and fill in your bench paths.

Bench path '/home/...' does not exist
→ The path in config.json → benches must be an existing directory.

bench command not found
→ Use the full path to the bench binary, e.g. /home/user/frappe-bench/env/bin/bench.

No credentials configured for site
→ Add api_key/api_secret for that site to config.json → site_credentials.

Authentication failed (401)
→ Regenerate API keys in the Frappe site: Settings → API Access.

Ngrok shows ERR_NGROK_3200
→ Your static domain may not be activated. Check ngrok Dashboard → Domains.

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license - not found
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quality - not tested
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