# 1. Create a config
npx -y mcp-doorman init

# 2. Edit doorman.config.json — put your real servers in it

# 3. Pin the current tool definitions (trust on first use)
npx -y mcp-doorman pin --config doorman.config.json

// BEFORE — every server talks straight to the model
{
  "mcpServers": {
    "github":     { "command": "npx", "args": ["-y", "@modelcontextprotocol/server-github"] },
    "filesystem": { "command": "npx", "args": ["-y", "@modelcontextprotocol/server-filesystem", "/repos"] }
  }
}

// AFTER — one doorman guards them all
{
  "mcpServers": {
    "doorman": {
      "command": "npx",
      "args": ["-y", "mcp-doorman", "run", "--config", "/absolute/path/to/doorman.config.json"]
    }
  }
}

git clone https://github.com/Sushank05/mcp-doorman && cd mcp-doorman
npm install
npm run demo

flowchart LR
    A["MCP client\n(Claude Desktop, Cursor, ...)"] -- stdio --> D
    subgraph D [mcp-doorman]
        direction TB
        P[policy] --> R[rate limit] --> AP[approval] --> RD[redaction] --> I[injection scan] --> AU[(audit log)]
    end
    D -- stdio --> S1[github server]
    D -- stdio --> S2[filesystem server]
    D -- streamable HTTP --> S3[remote server]

{
  "servers": {
    "github": {
      "command": "npx",
      "args": ["-y", "@modelcontextprotocol/server-github"],
      "env": { "GITHUB_PERSONAL_ACCESS_TOKEN": "${GITHUB_TOKEN}" }   // ${VAR} = read from gateway env
    },
    "remote": { "url": "https://mcp.example.com/mcp", "headers": { "Authorization": "Bearer ${MCP_TOKEN}" } }
  },

  "policy": {
    "defaultAction": "allow",                    // "allow" | "deny" | "approve"
    "rules": [                                   // first match wins, evaluated top-down
      { "match": "*__delete*",  "action": "deny",    "reason": "no destructive tools" },
      { "match": ["github__create_*", "*__send_*"], "action": "approve" },
      { "match": "filesystem__*", "action": "allow" }
    ]
  },

  "redaction": {
    "enabled": true,
    "disable": [],                               // built-in rule names to turn off
    "enableOptIn": ["email"],                    // opt-ins: "email", "us-ssn", "ipv4"
    "custom": [{ "name": "acme-id", "pattern": "ACME-[0-9]{6}" }],
    "redactArguments": false                     // also scrub model-supplied arguments
  },

  "injection": {
    "action": "flag",                            // "flag" (warn the model) | "block" | "off"
    "scanToolDescriptions": true,                // tool-poisoning check on tools/list
    "custom": []
  },

  "pinning": {
    "enabled": true,
    "onNewTool": "pin",                          // "pin" (TOFU) | "block" (until `mcp-doorman pin`)
    "onChangedTool": "block"                     // "block" | "warn"
  },

  "rateLimit": { "perMinute": 120, "perTool": { "*__send_*": 5 } },

  "approval": { "fallback": "deny", "timeoutMs": 120000 },  // fallback when client lacks elicitation

  "audit": { "enabled": true, "includeArguments": true, "includeResults": false },

  "logLevel": "info"
}

npm install
npm test          # 69 tests: unit + full stdio e2e
npm run build
npm run demo      # watch the guards fire live