CERT-MCP-SERVER

A standalone Python MCP (Model Context Protocol) server for managing SSL/TLS certificates across multiple device types using Let's Encrypt with Cloudflare DNS-01 challenges.

Features

• Multi-Device Support: Manage certificates on FortiGate, FortiManager, FortiAnalyzer, Windows, and Linux devices

• Let's Encrypt Integration: Automated certificate issuance using ACME protocol with DNS-01 challenges

• Cloudflare DNS: Automatic DNS record management for certificate validation

• 30 MCP Tools: Comprehensive toolset for certificate lifecycle management

• Dual Transport: Supports both STDIO (for MCP clients) and HTTP (REST API)

Related MCP server: PKI Studio MCP

Supported Device Types

Installation

# Clone the repository
cd /home/twingate/CERT-MCP-SERVER

# Install with uv
uv sync

# Or install with pip
pip install -e .

Configuration

Environment Variables

export CERT_MCP_CONFIG=/path/to/config.json
export CLOUDFLARE_API_TOKEN=your_cloudflare_token
export ACME_EMAIL=admin@example.com
export ACME_ACCOUNT_KEY_PATH=~/.acme/account.key

Configuration File

Create a config.json file:

{
  "server": {
    "host": "0.0.0.0",
    "port": 8815,
    "name": "cert-mcp-server",
    "version": "1.0.0"
  },
  "devices": {
    "fortigate": {
      "fw-01": {
        "host": "192.168.1.1",
        "api_token": "your_api_token",
        "vdom": "root"
      }
    },
    "linux": {
      "nginx-01": {
        "host": "192.168.1.10",
        "username": "admin",
        "ssh_key_path": "~/.ssh/id_rsa",
        "service_type": "nginx"
      }
    }
  },
  "acme": {
    "email": "admin@example.com",
    "staging": false,
    "account_key_path": "~/.acme/account.key"
  },
  "logging": {
    "level": "INFO",
    "console": true
  }
}

Usage

STDIO Mode (MCP Client)

# Run the server
uv run python -m cert_mcp.server

# Or use the entry point
cert-mcp

HTTP Mode (REST API)

# Run the HTTP server
uv run python -m cert_mcp.server_http

# Or use the entry point
cert-mcp-http

The HTTP server provides a REST API at http://localhost:8815.

MCP Tools (30 total)

Device Management (6)

• list_devices - List all registered devices

• add_device - Add a new device

• remove_device - Remove a device

• test_device_connection - Test connectivity

• get_device_info - Get device details

• list_devices_by_type - Filter devices by type

Certificate Check (5)

• list_certificates - List certificates on a device

• get_certificate_detail - Get certificate details

• check_certificate_expiry - Check expiry status

• check_all_expiring - Find all expiring certificates

• verify_certificate_chain - Verify chain validity

Let's Encrypt (4)

• request_certificate - Request new certificate

• list_cloudflare_zones - List DNS zones

• verify_cloudflare_token - Verify Cloudflare token

• get_acme_account_info - Get ACME account info

Certificate Install (4)

• import_certificate - Import certificate to device

• request_and_install - Request and install in one step

• import_ca_certificate - Import CA certificate

• copy_certificate - Copy between devices

Certificate Replace/Renew (3)

• replace_certificate - Replace existing certificate

• renew_certificate - Renew with Let's Encrypt

• auto_renew_check - Check and renew expiring certs

Certificate Delete (2)

• delete_certificate - Delete from device

• delete_certificate_batch - Delete from multiple devices

FortiManager-Specific (4)

• fmg_list_managed_devices - List managed FortiGates

• fmg_get_certificates_all - Get certs from all managed devices

• fmg_push_certificate - Push cert to managed devices

• fmg_check_certificate_status - Check cert status on devices

System (2)

• health_check - Server health status

• get_server_info - Server information

MCP Client Configuration

Add to your MCP client configuration:

{
  "mcpServers": {
    "cert-mcp": {
      "command": "uv",
      "args": ["run", "--directory", "/home/twingate/CERT-MCP-SERVER", "python", "-m", "cert_mcp.server"],
      "env": {
        "CERT_MCP_CONFIG": "/path/to/config.json",
        "CLOUDFLARE_API_TOKEN": "your_token"
      }
    }
  }
}

Examples

Request and Install Certificate

# Using MCP tool
await request_and_install(
    device_id="fw-01",
    domains=["example.com", "www.example.com"],
    cert_name="example-cert",
    staging=False
)

Check Expiring Certificates

# Find all certificates expiring in 30 days
result = await check_all_expiring(days_threshold=30)

Add a Device Dynamically

await add_device(
    device_id="nginx-02",
    device_type="linux",
    host="192.168.1.20",
    username="admin",
    ssh_key_path="~/.ssh/id_rsa",
    service_type="nginx"
)

Development

# Install dev dependencies
uv sync --dev

# Run tests
uv run pytest

# Format code
uv run black src/
uv run ruff check src/

License

MIT License