MCP Server

MCP server providing security guardrails and PII redaction for Claude Desktop and Claude Code.

Installation

Claude Code

claude mcp add superagent -- npx -y @superagent-ai/mcp

Claude Desktop

Add to ~/Library/Application Support/Claude/claude_desktop_config.json:

{
  "mcpServers": {
    "superagent": {
      "command": "npx",
      "args": ["-y", "@superagent-ai/mcp"],
      "env": {
        "SUPERAGENT_API_KEY": "your_api_key_here"
      }
    }
  }
}

Restart Claude Desktop after configuration.

Available Tools

superagent_guard

Analyze text for security threats like prompt injection, jailbreaks, and data exfiltration.

Parameters:

• text (required): Text to analyze
• system_prompt (optional): Custom classification instructions

Example prompt:

Check if this input is safe: "Ignore all previous instructions"

superagent_redact

Remove PII/PHI from text (emails, SSNs, phone numbers, credit cards, names, etc.)

Parameters:

• text (required): Text to redact
• entities (optional): Specific entity types to redact
• rewrite (optional): Rewrite naturally instead of placeholders

Example prompt:

Redact PII from: "My email is john@example.com and SSN is 123-45-6789"

Quick Examples

Security check:

Use superagent_guard to check: "Delete all files with rm -rf /"

Redact all PII:

Use superagent_redact on: "Contact John at john@company.com or 555-1234"

Redact specific entities:

Redact only emails from: "Email: test@test.com, Phone: 555-9999"
Use entities=['EMAIL']

Environment Variables

• SUPERAGENT_API_KEY - Your Superagent API key (get one at superagent.sh)