mcp-server

Declaw MCP Server

MCP server for Declaw — secure sandbox execution for AI agents with network policies, PII scanning, prompt injection defense, and audit logging.

Works with Claude Desktop, Claude Code, Cursor, Windsurf, and any MCP-compatible AI tool.

Quick Start

Claude Desktop / Cursor / Windsurf

Add to your MCP config:

{
  "mcpServers": {
    "declaw": {
      "command": "npx",
      "args": ["-y", "@declaw/mcp-server"],
      "env": {
        "DECLAW_API_KEY": "your-api-key"
      }
    }
  }
}

Claude Code

claude mcp add declaw -- npx -y @declaw/mcp-server

Set DECLAW_API_KEY in your environment.

Tools

| Tool | Description | |------|-------------| | create_sandbox | Create a secure sandbox with configurable security policies | | run_command | Execute a shell command inside a sandbox | | read_file | Read a file from a sandbox | | write_file | Write a file to a sandbox | | list_files | List directory contents in a sandbox | | kill_sandbox | Destroy a sandbox | | list_sandboxes | List all active sandboxes |

Security Presets

When creating a sandbox, choose a security preset:

• none — No guardrails. Full internet access.
• standard (default) — PII scanning + audit logging. Full internet access.
• strict — PII scanning + prompt injection defense + audit logging + network deny-all.

You can also pass allowed_domains to restrict outbound traffic to specific domains:

create_sandbox with template="python", security_preset="strict", allowed_domains=["pypi.org", "github.com"]

Why Declaw?

| | Declaw | Other Sandbox Providers | |---|---|---| | Sandbox execution | Yes | Yes | | Non-bypassable network controls | Yes | ?? | | PII scanning | Yes | No | | Injection defense | Yes | No | | Full audit trail | Yes | Basic | | Snapshots | Yes | Varies | | Multiple templates | 8 built-in | Varies | | Interactive stdio | Yes | Varies |

Environment Variables

| Variable | Required | Description | |----------|----------|-------------| | DECLAW_API_KEY | Yes | Your Declaw API key | | DECLAW_DOMAIN | No | Custom API domain (for on-prem deployments) |

On-Prem

For self-hosted Declaw deployments, set the domain:

{
  "mcpServers": {
    "declaw": {
      "command": "npx",
      "args": ["-y", "@declaw/mcp-server"],
      "env": {
        "DECLAW_API_KEY": "your-api-key",
        "DECLAW_DOMAIN": "declaw.internal.company.com"
      }
    }
  }
}

License

Apache-2.0