@declaw/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