ExternalAttacker MCP
ExternalAttacker MCP server enabling AI agents to perform external attack surface reconnaissance — running subdomain enumeration, port scanning, SSL certificate analysis, DNS reconnaissance, and attack surface mapping, integrating security testing tools into agent-driven external penetration testing and attack surface management workflows.
Score Breakdown
⚙ Agent Friendliness
🔒 Security
Authorization required. Local execution. Community MCP. Use in authorized pentest scope only.
⚡ Reliability
Best When
An authorized penetration tester or red team needs AI-assisted external attack surface reconnaissance — coordinating multiple recon tools through a unified agent interface.
Avoid When
You don't have explicit written authorization to test the target systems — scanning without authorization is illegal in most jurisdictions.
Use Cases
- • Enumerating subdomains and external attack surface from pentest agents
- • Running port scans and service fingerprinting from security assessment agents
- • Analyzing SSL/TLS certificates and misconfigurations from security audit agents
- • Performing DNS reconnaissance from OSINT agents
- • Mapping external exposure for attack surface management from SecOps agents
- • Automating external vulnerability discovery from authorized pentest agents
Not For
- • Unauthorized scanning of systems you don't own (illegal without authorization)
- • Internal network scanning (designed for external attack surface)
- • Production security tools without proper authorization scope documentation
Interface
Authentication
No MCP authentication — local server invoking system tools (nmap, subfinder, etc.). Requires external tools installed on host. Must have authorization to test targets.
Pricing
Free open source MCP. External tools (nmap, subfinder, etc.) may require separate installation. Some third-party APIs used may have rate limits.
Agent Metadata
Known Gotchas
- ⚠ REQUIRES explicit written authorization before use — unauthorized scanning is illegal
- ⚠ External recon tools (nmap, subfinder, amass, etc.) must be installed separately
- ⚠ Scan results can trigger IDS/IPS alerts — coordinate with target organization
- ⚠ Scan duration varies widely — port scans can take minutes to hours
- ⚠ Community security MCP from individual — limited validation of results
- ⚠ Rate limiting not enforced — agents must throttle aggressive scanning
- ⚠ Output formats vary by tool — agents must parse diverse result formats
Alternatives
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Scores are editorial opinions as of 2026-03-07.