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Cisco MCP Scanner

Name: Cisco MCP Scanner MCP Server
Author: cisco-ai-defense

por cisco-ai-defense · cisco-ai-defense/mcp-scanner

Run a battery of prompt-injection, tool-shadowing, and exfiltration tests against any MCP server before you trust it in production.

Cisco's scanner enumerates an MCP server's tools, descriptions, and prompts, then probes them with known attack templates: indirect injection in returned data, tool-name shadowing, suspicious schema fields, exfil-via-error, and more. You get a Markdown/JSON report you can attach to a PR.

▶ Ver demo 📦 Instalar 💡 Casos de uso

Por que usar

Principais recursos

Probes tool descriptions for hidden instructions
Tests indirect prompt injection in returned content
Detects tool shadowing / spoofing risk
Heuristics for credential exfil via error messages
Markdown + JSON report formats
CI-friendly exit codes

Demo ao vivo

Como fica na prática

pronto

Instalar

Escolha seu cliente

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

{
  "mcpServers": {
    "cisco-mcp-scanner": {
      "command": "uvx",
      "args": [
        "mcp-scanner",
        "--server",
        "stdio:npx -y <target>"
      ],
      "_doc": "Run against any MCP server config; produces a security report."
    }
  }
}

Abra Claude Desktop → Settings → Developer → Edit Config. Reinicie após salvar.

~/.cursor/mcp.json · .cursor/mcp.json

{
  "mcpServers": {
    "cisco-mcp-scanner": {
      "command": "uvx",
      "args": [
        "mcp-scanner",
        "--server",
        "stdio:npx -y <target>"
      ],
      "_doc": "Run against any MCP server config; produces a security report."
    }
  }
}

Cursor usa o mesmo esquema mcpServers que o Claude Desktop. Config de projeto vence a global.

VS Code → Cline → MCP Servers → Edit

{
  "mcpServers": {
    "cisco-mcp-scanner": {
      "command": "uvx",
      "args": [
        "mcp-scanner",
        "--server",
        "stdio:npx -y <target>"
      ],
      "_doc": "Run against any MCP server config; produces a security report."
    }
  }
}

Clique no ícone MCP Servers na barra lateral do Cline, depois "Edit Configuration".

~/.codeium/windsurf/mcp_config.json

{
  "mcpServers": {
    "cisco-mcp-scanner": {
      "command": "uvx",
      "args": [
        "mcp-scanner",
        "--server",
        "stdio:npx -y <target>"
      ],
      "_doc": "Run against any MCP server config; produces a security report."
    }
  }
}

Mesmo formato do Claude Desktop. Reinicie o Windsurf para aplicar.

~/.continue/config.json

{
  "mcpServers": [
    {
      "name": "cisco-mcp-scanner",
      "command": "uvx",
      "args": [
        "mcp-scanner",
        "--server",
        "stdio:npx -y <target>"
      ]
    }
  ]
}

O Continue usa um array de objetos de servidor em vez de um map.

~/.config/zed/settings.json

{
  "context_servers": {
    "cisco-mcp-scanner": {
      "command": {
        "path": "uvx",
        "args": [
          "mcp-scanner",
          "--server",
          "stdio:npx -y <target>"
        ]
      }
    }
  }
}

Adicione em context_servers. Zed recarrega automaticamente ao salvar.

claude mcp add cisco-mcp-scanner -- uvx mcp-scanner --server 'stdio:npx -y <target>'

Uma linha só. Verifique com claude mcp list. Remova com claude mcp remove.

Casos de uso

Usos do mundo real: Cisco MCP Scanner

Audit a third-party MCP before adopting it

👤 Developers ⏱ ~15 min intermediate

Quando usar: A teammate wants to install a community MCP and you want a security signal first.

Fluxo

Install scanner

uvx mcp-scanner --help✓ Copiado

→ Scanner runs
Scan

mcp-scanner --server "stdio:npx -y the-mcp" --output report.md✓ Copiado

→ Report written
Review

Open report.md; triage findings by severity.✓ Copiado

→ Adoption decision documented

Resultado: Documented security review before merging the MCP into your config.

Gate MCP changes in CI

👤 Developers ⏱ ~15 min intermediate

Quando usar: You ship an internal MCP and want a baseline check on every PR.

Fluxo

Add CI step

Run mcp-scanner against the built server; fail on HIGH findings.✓ Copiado

→ PR fails on regressions
Fix or accept

Each finding gets fixed or annotated with a risk acceptance.✓ Copiado

→ Clean baseline

Resultado: No new prompt-injection surface ships unreviewed.

Combinações

Combine com outros MCPs para 10× de alavancagem

cisco-mcp-scanner + github

Run on every PR via Actions; comment findings on the PR

Combine cisco-mcp-scanner with github: Run on every PR via Actions; comment findings on the PR✓ Copiado

cisco-mcp-scanner + sentry

Pipe scanner findings as Sentry alerts on main branch

Combine cisco-mcp-scanner with sentry: Pipe scanner findings as Sentry alerts on main branch✓ Copiado

Ferramentas

O que este MCP expõe

Ferramenta	Entradas	Quando chamar	Custo
scanner CLI	(see docs)	Not exposed as MCP tools — this is a scanner, not a server	1 call

Custo e limites

O que custa rodar

Cota de API: N/A
Tokens por chamada: Local — uses the target MCP only
Monetário: Free OSS
Dica: Run scans in a sandboxed network so probes can't exfil real data

Segurança

Permissões, segredos, alcance

Armazenamento de credenciais: No credentials by itself

Saída de dados: Whatever the target MCP egresses

Nunca conceda: point at a production MCP with real credentials — use a staging instance

Solução de problemas

Erros comuns e correções

Scanner times out on a slow MCP

Increase --timeout; check the server actually starts under stdio

False positives on benign tools

Use --baseline to mark them; future runs ignore

Alternativas

Cisco MCP Scanner vs. outros

Alternativa	Quando usar	Troca
Manual review	Single-author trusted MCP	Misses subtle injection patterns

Mais

Recursos

📖 Leia o README oficial no GitHub

🐙 Ver issues abertas

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