Contrast
🐍 ☁️ - Security intelligence API with 31 MCP tools for CVE/EPSS/KEV lookup, domain recon (DNS/WHOIS/
What is Contrast?
Contrast is a Model Context Protocol (MCP) server that allows AI assistants like Claude, Cursor, and VS Code to 🐍 ☁️ - security intelligence api with 31 mcp tools for cve/epss/kev lookup, domain recon (dns/whois/
🐍 ☁️ - Security intelligence API with 31 MCP tools for CVE/EPSS/KEV lookup, domain recon (DNS/WHOIS/
This server falls under the Security category on MCPgee, the world's largest MCP server directory with 33,000+ servers.
Features
- MCP protocol support
Use Cases
Maintainer
Works with
Installation
Manual Installation
npx contrastapiConfiguration
Configuration Details
claude_desktop_config.json
Performance
Response Metrics
Resource Usage
How to Set Up and Use Contrast
ContrastAPI is a security intelligence MCP server that exposes 54 tools covering vulnerability research, domain reconnaissance, threat intelligence, and code security analysis. It connects to the ContrastCyber API (https://api.contrastcyber.com) and requires no API key — access is rate-limited to 30 credits per hour on a free tier. Developers and security teams use it to look up CVEs with EPSS/KEV scoring, audit domains for threats, validate emails, and run composite risk assessments directly inside AI assistants like Claude.
Prerequisites
- An MCP-compatible client such as Claude Desktop or Claude Code
- Node.js 14+ (for npx) or Python 3.10+ (for pip install)
- Internet access to reach https://api.contrastcyber.com (no API key required)
- Awareness of the free-tier rate limit: 30 credits per hour
Choose your transport method
ContrastAPI runs as a remote MCP server over HTTPS. The simplest setup uses mcp-remote as a proxy so any MCP client can connect without running a local process. Alternatively, install the Python package locally via pip.
pip install contrastapiAdd the server to your MCP client config
Open your claude_desktop_config.json (or equivalent MCP client config) and add the ContrastAPI entry. The recommended approach uses npx mcp-remote to proxy the hosted API endpoint.
{
"mcpServers": {
"contrastapi": {
"command": "npx",
"args": ["-y", "mcp-remote", "https://api.contrastcyber.com/mcp/"]
}
}
}Restart your MCP client
Save the configuration file and fully restart Claude Desktop (or your chosen client). The 54 ContrastAPI tools will appear in the tool list. No authentication step is needed — all requests are anonymously rate-limited.
Run a CVE lookup
Ask Claude to look up a CVE by ID. The server will call the vulnerability intelligence tools and return CVSS scores, EPSS probability, KEV inclusion status, and known proof-of-concept exploit references.
Audit a domain for threats
Use the domain audit and IP reputation tools to investigate a hostname. The server can resolve DNS, check WHOIS records, validate email infrastructure, scrape brand assets, and trace redirect chains.
Contrast Examples
Client configuration (mcp-remote proxy)
Minimal claude_desktop_config.json entry using npx mcp-remote to connect to the hosted ContrastAPI endpoint. No environment variables or credentials required.
{
"mcpServers": {
"contrastapi": {
"command": "npx",
"args": ["-y", "mcp-remote", "https://api.contrastcyber.com/mcp/"]
}
}
}Prompts to try
Sample prompts that exercise the main ContrastAPI tool categories: vulnerability lookup, domain recon, and risk scoring.
- "Look up CVE-2021-44228 and give me its CVSS score, EPSS probability, and whether it's in the KEV catalog"
- "Audit the domain suspicious-site.io — check DNS, WHOIS, and IP reputation"
- "Give me a composite risk score for Apache Log4j CVE-2021-44228 including EPSS and any known PoCs"
- "Validate the email security posture of example.com (SPF, DKIM, DMARC)"
- "List CVEs affecting OpenSSL that are also in the KEV catalog"Troubleshooting Contrast
Requests fail or return 429 errors after a few queries
The free tier is limited to 30 credits per hour. Wait for the rate limit window to reset, or spread queries over time. Each tool call consumes one or more credits depending on the operation.
npx mcp-remote is not found
Ensure Node.js 14+ is installed and run `npm install -g mcp-remote` once, or rely on npx to download it automatically the first time. Check with `npx mcp-remote --version`.
Tools do not appear in Claude Desktop after saving config
Fully quit and relaunch Claude Desktop — menu bar > Quit, then reopen. Check the MCP server list in Settings > Developer to confirm contrastapi is connected and not showing an error.
Frequently Asked Questions about Contrast
What is Contrast?
Contrast is a Model Context Protocol (MCP) server that 🐍 ☁️ - security intelligence api with 31 mcp tools for cve/epss/kev lookup, domain recon (dns/whois/ It connects AI assistants to external tools and data sources through a standardized interface.
How do I install Contrast?
Follow the installation instructions on the Contrast GitHub repository. Clone the repo, install dependencies, and add the server config to your AI client.
Which AI clients work with Contrast?
Contrast works with all major MCP-compatible AI clients including Claude Desktop, Claude Code, Cursor, VS Code (GitHub Copilot), Windsurf, and Cline.
Is Contrast free to use?
Yes, Contrast is open source and available under the MIT License license. You can use it freely in both personal and commercial projects.
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