VirusTotal MCP Server

A Model Context Protocol (MCP) server for querying the VirusTotal API. This server provides comprehensive security analysis tools with automatic relationship data fetching. It integrates seamlessly with MCP-compatible applications like Claude Desktop.

Quick Start (Recommended)

Claude Code

claude mcp add --transport stdio --env VIRUSTOTAL_API_KEY=your-key virustotal -- npx -y @burtthecoder/mcp-virustotal

Codex CLI

codex mcp add virustotal --env VIRUSTOTAL_API_KEY=your-key -- npx -y @burtthecoder/mcp-virustotal

Gemini CLI

gemini mcp add -e VIRUSTOTAL_API_KEY=your-key virustotal npx -y @burtthecoder/mcp-virustotal

Installing via Smithery

To install VirusTotal Server for Claude Desktop automatically via Smithery:

npx -y @smithery/cli install @burtthecoder/mcp-virustotal --client claude

Installing Manually

1. Install the server globally via npm:

npm install -g @burtthecoder/mcp-virustotal

2. Add to your Claude Desktop configuration file:

{
  "mcpServers": {
    "virustotal": {
      "command": "mcp-virustotal",
      "env": {
        "VIRUSTOTAL_API_KEY": "your-virustotal-api-key"
      }
    }
  }
}

Configuration file location:

• macOS: ~/Library/Application Support/Claude/claude_desktop_config.json
• Windows: %APPDATA%\Claude\claude_desktop_config.json

3. Restart Claude Desktop

Using with VS Code

To use this MCP server in VS Code with GitHub Copilot:

1. Install the server globally via npm:

npm install -g @burtthecoder/mcp-virustotal

2. Create or update your VS Code MCP configuration file at:

   • macOS/Linux: ~/.vscode/mcp.json
   • Windows: %USERPROFILE%\.vscode\mcp.json

3. Add the following configuration:

{
  "servers": {
    "virustotal": {
      "command": "mcp-virustotal",
      "env": {
        "VIRUSTOTAL_API_KEY": "your-virustotal-api-key"
      }
    }
  }
}

4. Reload VS Code to activate the MCP server

You can then use the VirusTotal tools through GitHub Copilot in VS Code by referencing the available tools in your prompts.

Alternative Setup (From Source)

If you prefer to run from source or need to modify the code:

1. Clone and build:

git clone <repository_url>
cd mcp-virustotal
npm install
npm run build

2. Add to your Claude Desktop configuration:

{
  "mcpServers": {
    "virustotal": {
      "command": "node",
      "args": ["/absolute/path/to/mcp-virustotal/build/index.js"],
      "env": {
        "VIRUSTOTAL_API_KEY": "your-virustotal-api-key"
      }
    }
  }
}

HTTP Streaming Transport

The server supports HTTP streaming transport in addition to the default stdio transport. This is useful for running the server as a standalone HTTP service that multiple clients can connect to.

Running in HTTP Streaming Mode

Set the MCP_TRANSPORT environment variable to httpStream:

MCP_TRANSPORT=httpStream MCP_PORT=3000 VIRUSTOTAL_API_KEY=your-key node build/index.js

Environment Variables

| Variable | Default | Description | |---|---|---| | VIRUSTOTAL_API_KEY | (required) | Your VirusTotal API key | | MCP_TRANSPORT | stdio | Transport mode: stdio or httpStream | | MCP_PORT | 3000 | HTTP server port (only for httpStream) | | MCP_ENDPOINT | /mcp | HTTP endpoint path (only for httpStream) |

Docker with HTTP Streaming

docker build -t mcp-virustotal .
docker run -p 3000:3000 \
  -e VIRUSTOTAL_API_KEY=your-key \
  -e MCP_TRANSPORT=httpStream \
  mcp-virustotal

The server exposes a health check endpoint at /health when running in HTTP streaming mode.

Features

• Comprehensive Analysis Reports: Each analysis tool automatically fetches relevant relationship data along with the basic report, providing a complete security overview in a single request
• URL Analysis: Security reports with automatic fetching of contacted domains, downloaded files, and threat actors
• File Analysis: Detailed analysis of file hashes including behaviors, dropped files, and network connections
• IP Analysis: Security reports with historical data, resolutions, and related threats
• Domain Analysis: DNS information, WHOIS data, SSL certificates, and subdomains
• Detailed Relationship Analysis: Dedicated tools for querying specific types of relationships with pagination support
• Rich Formatting: Clear categorization and presentation of analysis results and relationship data

Tools

Report Tools (with Automatic Relationship Fetching)

1. URL Report Tool

• Name: get_url_report
• Description: Get a comprehensive URL analysis report including security scan results and key relationships (communicating files, contacted domains/IPs, downloaded files, redirects, threat actors)
• Parameters:
  • url (required): The URL to analyze

2. File Report Tool

• Name: get_file_report
• Description: Get a comprehensive file analysis report using its hash (MD5/SHA-1/SHA-256). Includes detection results, file properties, and key relationships (behaviors, dropped files, network connections, embedded content, threat actors)
• Parameters:
  • hash (required): MD5, SHA-1 or SHA-256 hash of the file

3. IP Report Tool

• Name: get_ip_report
• Description: Get a comprehensive IP address analysis report including geolocation, reputation data, and key relationships (communicating files, historical certificates/WHOIS, resolutions)
• Parameters:
  • ip (required): IP address to analyze

4. Domain Report Tool

• Name: get_domain_report
• Description: Get a comprehensive domain analysis report including DNS records, WHOIS data, and key relationships (SSL certificates, subdomains, historical data)
• Parameters:
  • domain (required): Domain name to analyze
  • relationships (optional): Array of specific relationships to include in the report

Relationship Tools (for Detailed Analysis)

1. URL Relationship Tool

• Name: get_url_relationship
• Description: Query a specific relationship type for a URL with pagination support. Choose from 17 relationship types including analyses, communicating files, contacted domains/IPs, downloaded files, graphs, referrers, redirects, and threat actors
• Parameters:
  • url (required): The URL to get relationships for
  • relationship (required): Type of relationship to query
    • Available relationships: analyses, comments, communicating_files, contacted_domains, contacted_ips, downloaded_files, graphs, last_serving_ip_address, network_location, referrer_files, referrer_urls, redirecting_urls, redirects_to, related_comments, related_references, related_threat_actors, submissions
  • limit (optional, default: 10): Maximum number of related objects to retrieve (1-40)
  • cursor (optional): Continuation cursor for pagination

2. File Relationship Tool

• Name: get_file_relationship
• Description: Query a specific relationship type for a file with pagination support. Choose from 41 relationship types including behaviors, network connections, dropped files, embedded content, execution chains, and threat actors
• Parameters:
  • hash (required): MD5, SHA-1 or SHA-256 hash of the file
  • relationship (required): Type of relationship to query
    • Available relationships: analyses, behaviours, bundled_files, carbonblack_children, carbonblack_parents, ciphered_bundled_files, ciphered_parents, clues, collections, comments, compressed_parents, contacted_domains, contacted_ips, contacted_urls, dropped_files, email_attachments, email_parents, embedded_domains, embedded_ips, embedded_urls, execution_parents, graphs, itw_domains, itw_ips, itw_urls, memory_pattern_domains, memory_pattern_ips, memory_pattern_urls, overlay_children, overlay_parents, pcap_children, pcap_parents, pe_resource_children, pe_resource_parents, related_references, related_threat_actors, similar_files, submissions, screenshots, urls_for_embedded_js, votes
  • limit (optional, default: 10): Maximum number of related objects to retrieve (1-40)
  • cursor (optional): Continuation cursor for pagination

3. IP Relationship Tool

• Name: get_ip_relationship
• Description: Query a specific relationship type for an IP address with pagination support. Choose from 12 relationship types including communicating files, historical SSL certificates, WHOIS records, resolutions, and threat actors
• Parameters:
  • ip (required): IP address to analyze
  • relationship (required): Type of relationship to query
    • Available relationships: comments, communicating_files, downloaded_files, graphs, historical_ssl_certificates, historical_whois, related_comments, related_references, related_threat_actors, referrer_files, resolutions, urls
  • limit (optional, default: 10): Maximum number of related objects to retrieve (1-40)
  • cursor (optional): Continuation cursor for pagination

4. Domain Relationship Tool

• Name: get_domain_relationship
• Description: Query a specific relationship type for a domain with pagination support. Choose from 21 relationship types including SSL certificates, subdomains, historical data, and DNS records
• Parameters:
  • domain (required): Domain name to analyze
  • relationship (required): Type of relationship to query
    • Available relationships: caa_records, cname_records, comments, communicating_files, downloaded_files, historical_ssl_certificates, historical_whois, immediate_parent, mx_records, ns_records, parent, referrer_files, related_comments, related_references, related_threat_actors, resolutions, soa_records, siblings, subdomains, urls, user_votes
  • limit (optional, default: 10): Maximum number of related objects to retrieve (1-40)
  • cursor (optional): Continuation cursor for pagination

Requirements

• Node.js (v20 or later)
• A valid VirusTotal API Key

Troubleshooting

API Key Issues

If you see "Wrong API key" errors:

1. Check the log file at /tmp/mcp-virustotal-server.log (on macOS) for API key status
2. Verify your API key:
   • Should be a valid VirusTotal API key (usually 64 characters)
   • No extra spaces or quotes around the key
   • Must be from the API Keys section in your VirusTotal account
3. After any configuration changes:
   • Save the config file
   • Restart Claude Desktop
   • Check logs for new API key status

Development

To run in development mode with hot reloading:

npm run dev

Error Handling

The server includes comprehensive error handling for:

• Invalid API keys
• Rate limiting
• Network errors
• Invalid input parameters
• Invalid hash formats
• Invalid IP formats
• Invalid URL formats
• Invalid relationship types
• Pagination errors

Version History

• v1.0.0: Initial release with core functionality
• v1.1.0: Added relationship analysis tools for URLs, files, and IP addresses
• v1.2.0: Added improved error handling and logging
• v1.3.0: Added pagination support for relationship queries
• v1.4.0: Added automatic relationship fetching in report tools and domain analysis support
• v1.5.0: Migrated to FastMCP framework with HTTP streaming transport support

Contributing

1. Fork the repository
2. Create a feature branch (git checkout -b feature/amazing-feature)
3. Commit your changes (git commit -m 'Add amazing feature')
4. Push to the branch (git push origin feature/amazing-feature)
5. Open a Pull Request

License

This project is licensed under the MIT License - see the LICENSE file for details.