VirusTotal MCP Server: Real-Time Threat Analysis & Automated Decisions

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)

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

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": ["--experimental-modules", "/absolute/path/to/mcp-virustotal/build/index.js"],
      "env": {
        "VIRUSTOTAL_API_KEY": "your-virustotal-api-key"
      }
    }
  }
}

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 (v18 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

Module Loading Issues

If you see ES module loading warnings:

1. For global installation: Use the simple configuration shown in Quick Start
2. For source installation: Ensure you include --experimental-modules in the args

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

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.