attack-surface-mcp-server MCP

A community-driven MCP server for passive external attack-surface mapping. It discovers subdomains via Certificate Transparency logs, resolves DNS records, inspects TLS and HTTP security posture, and retrieves RDAP/WHOIS data. It supports STDIO and Streamable HTTP transports and includes an SSRF guard to prevent access to private or internal network targets.

Package and access

Local package with source-attributed installation metadata. Koskamo does not execute packages during review.

Community listingLocal stdioSource reviewed; not executedPublished by cyanheads

Vendor documentation

What you can do with it

Map a domain's external surface including CT logs and DNS liveness
Resolve DNS records and inspect TLS security posture
Retrieve RDAP/WHOIS registry information for assets
Enrich IP data with optional Shodan host intelligence

Source and maintenance

Community listingRegistry 0.5.0

mcp-registry: io.github.cyanheads/attack-surface-mcp-server@0.5.0 Source repository

Maintenance checked: Oct 31, 2026, 10:27 PM UTC

Packages and installation

Source-provided package data. Koskamo has not executed or live-probed this package.

@cyanheads/attack-surface-mcp-server 0.5.0

npmnpx

@cyanheads/attack-surface-mcp-server package definition

{
  "version": "0.5.0",
  "transport": "stdio",
  "identifier": "@cyanheads/attack-surface-mcp-server",
  "runtimeHint": "npx",
  "registryType": "npm",
  "registryBaseUrl": "https://registry.npmjs.org",
  "environmentVariables": [
    {
      "name": "SHODAN_API_KEY",
      "format": "string",
      "description": "Optional Shodan API key. Enables attacksurface_lookup_host; absent → that one tool returns source_unavailable and the rest of the server works."
    },
    {
      "name": "CERTSPOTTER_API_KEY",
      "format": "string",
      "description": "Optional Certspotter API key. Raises CT-fallback rate limits; absent → free unauthenticated tier."
    },
    {
      "name": "ATTACKSURFACE_DEFAULT_RESOLVERS",
      "format": "string",
      "default": "8.8.8.8,1.1.1.1,9.9.9.9",
      "description": "Comma-separated default DNS resolver IPs for attacksurface_resolve_dns."
    },
    {
      "name": "ATTACKSURFACE_HTTP_USER_AGENT",
      "format": "string",
      "description": "Default User-Agent for attacksurface_probe_http (overridable per call)."
    },
    {
      "name": "ATTACKSURFACE_MAX_SUBDOMAINS",
      "format": "string",
      "default": "200",
      "description": "Map/snapshot resolution cap; enumeration also caps each page at 50 candidates."
    },
    {
      "name": "ATTACKSURFACE_RDAP_BOOTSTRAP_URL",
      "format": "string",
      "default": "https://rdap.org",
      "description": "RDAP bootstrap base URL; override for a private/mirrored RDAP."
    },
    {
      "name": "ATTACKSURFACE_ALLOW_PRIVATE_TARGETS",
      "format": "string",
      "default": "false",
      "description": "Set true to permit non-public target ranges for trusted internal-network assessment; URL and HTTP(S) scheme checks remain enforced."
    },
    {
      "name": "MCP_LOG_LEVEL",
      "format": "string",
      "default": "info",
      "description": "Sets the minimum log level for output (e.g., 'debug', 'info', 'warn')."
    }
  ]
}

Tools

Reported by the attributed source; not independently observed by Koskamo.

No tool definitions available.

Connect from your client

Each snippet configures the same source-provided package; replace placeholders before use.

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Cursor

Merge this local stdio configuration, replace every placeholder environment value, and restart Cursor. Koskamo has not executed this package.

Cursor configuration

{
  "mcpServers": {
    "attack-surface-mcp-server-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@cyanheads/attack-surface-mcp-server@0.5.0"
      ],
      "env": {
        "SHODAN_API_KEY": "<YOUR_SHODAN_API_KEY>",
        "CERTSPOTTER_API_KEY": "<YOUR_CERTSPOTTER_API_KEY>",
        "ATTACKSURFACE_DEFAULT_RESOLVERS": "<YOUR_ATTACKSURFACE_DEFAULT_RESOLVERS>",
        "ATTACKSURFACE_HTTP_USER_AGENT": "<YOUR_ATTACKSURFACE_HTTP_USER_AGENT>",
        "ATTACKSURFACE_MAX_SUBDOMAINS": "<YOUR_ATTACKSURFACE_MAX_SUBDOMAINS>",
        "ATTACKSURFACE_RDAP_BOOTSTRAP_URL": "<YOUR_ATTACKSURFACE_RDAP_BOOTSTRAP_URL>",
        "ATTACKSURFACE_ALLOW_PRIVATE_TARGETS": "<YOUR_ATTACKSURFACE_ALLOW_PRIVATE_TARGETS>",
        "MCP_LOG_LEVEL": "<YOUR_MCP_LOG_LEVEL>"
      }
    }
  }
}

Cline

Merge this local stdio configuration, replace every placeholder environment value, and restart Cline. Koskamo has not executed this package.

Cline configuration

{
  "mcpServers": {
    "attack-surface-mcp-server-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@cyanheads/attack-surface-mcp-server@0.5.0"
      ],
      "env": {
        "SHODAN_API_KEY": "<YOUR_SHODAN_API_KEY>",
        "CERTSPOTTER_API_KEY": "<YOUR_CERTSPOTTER_API_KEY>",
        "ATTACKSURFACE_DEFAULT_RESOLVERS": "<YOUR_ATTACKSURFACE_DEFAULT_RESOLVERS>",
        "ATTACKSURFACE_HTTP_USER_AGENT": "<YOUR_ATTACKSURFACE_HTTP_USER_AGENT>",
        "ATTACKSURFACE_MAX_SUBDOMAINS": "<YOUR_ATTACKSURFACE_MAX_SUBDOMAINS>",
        "ATTACKSURFACE_RDAP_BOOTSTRAP_URL": "<YOUR_ATTACKSURFACE_RDAP_BOOTSTRAP_URL>",
        "ATTACKSURFACE_ALLOW_PRIVATE_TARGETS": "<YOUR_ATTACKSURFACE_ALLOW_PRIVATE_TARGETS>",
        "MCP_LOG_LEVEL": "<YOUR_MCP_LOG_LEVEL>"
      }
    }
  }
}

VS Code

Merge this local stdio configuration, replace every placeholder environment value, and restart VS Code. Koskamo has not executed this package.

VS Code configuration

{
  "servers": {
    "attack-surface-mcp-server-mcp": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@cyanheads/attack-surface-mcp-server@0.5.0"
      ],
      "env": {
        "SHODAN_API_KEY": "<YOUR_SHODAN_API_KEY>",
        "CERTSPOTTER_API_KEY": "<YOUR_CERTSPOTTER_API_KEY>",
        "ATTACKSURFACE_DEFAULT_RESOLVERS": "<YOUR_ATTACKSURFACE_DEFAULT_RESOLVERS>",
        "ATTACKSURFACE_HTTP_USER_AGENT": "<YOUR_ATTACKSURFACE_HTTP_USER_AGENT>",
        "ATTACKSURFACE_MAX_SUBDOMAINS": "<YOUR_ATTACKSURFACE_MAX_SUBDOMAINS>",
        "ATTACKSURFACE_RDAP_BOOTSTRAP_URL": "<YOUR_ATTACKSURFACE_RDAP_BOOTSTRAP_URL>",
        "ATTACKSURFACE_ALLOW_PRIVATE_TARGETS": "<YOUR_ATTACKSURFACE_ALLOW_PRIVATE_TARGETS>",
        "MCP_LOG_LEVEL": "<YOUR_MCP_LOG_LEVEL>"
      }
    }
  }
}

Claude Desktop

Merge this local stdio configuration, replace every placeholder environment value, and restart Claude Desktop. Koskamo has not executed this package.

Claude Desktop configuration

{
  "mcpServers": {
    "attack-surface-mcp-server-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@cyanheads/attack-surface-mcp-server@0.5.0"
      ],
      "env": {
        "SHODAN_API_KEY": "<YOUR_SHODAN_API_KEY>",
        "CERTSPOTTER_API_KEY": "<YOUR_CERTSPOTTER_API_KEY>",
        "ATTACKSURFACE_DEFAULT_RESOLVERS": "<YOUR_ATTACKSURFACE_DEFAULT_RESOLVERS>",
        "ATTACKSURFACE_HTTP_USER_AGENT": "<YOUR_ATTACKSURFACE_HTTP_USER_AGENT>",
        "ATTACKSURFACE_MAX_SUBDOMAINS": "<YOUR_ATTACKSURFACE_MAX_SUBDOMAINS>",
        "ATTACKSURFACE_RDAP_BOOTSTRAP_URL": "<YOUR_ATTACKSURFACE_RDAP_BOOTSTRAP_URL>",
        "ATTACKSURFACE_ALLOW_PRIVATE_TARGETS": "<YOUR_ATTACKSURFACE_ALLOW_PRIVATE_TARGETS>",
        "MCP_LOG_LEVEL": "<YOUR_MCP_LOG_LEVEL>"
      }
    }
  }
}

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