bowtie-mcp

Bowtie MCP Server

   

An MCP server for the Bowtie control plane. Manage your Bowtie cluster — policies, devices, DNS, users, and more — using natural language through your LLM of choice or any MCP-capable client.

Install

pip install bowtie-mcp

Or run without installing using uvx:

uvx bowtie-mcp

Quick Start

Claude Code

claude mcp add bowtie \
  -e BOWTIE_HOST="https://bt0.example.com" \
  -e BOWTIE_USERNAME="admin@example.com" \
  -e BOWTIE_PASSWORD="your-password" \
  -- uvx bowtie-mcp

Claude Desktop

Add to your claude_desktop_config.json:

{
  "mcpServers": {
    "bowtie": {
      "command": "uvx",
      "args": ["bowtie-mcp"],
      "env": {
        "BOWTIE_HOST": "https://bt0.example.com",
        "BOWTIE_USERNAME": "admin@example.com",
        "BOWTIE_PASSWORD": "your-password"
      }
    }
  }
}

Cursor / Windsurf

Add to .cursor/mcp.json or your editor's MCP config:

{
  "mcpServers": {
    "bowtie": {
      "command": "uvx",
      "args": ["bowtie-mcp"],
      "env": {
        "BOWTIE_HOST": "https://bt0.example.com",
        "BOWTIE_USERNAME": "admin@example.com",
        "BOWTIE_PASSWORD": "your-password"
      }
    }
  }
}

HTTP Streaming Mode

For clients that connect over HTTP instead of spawning a local stdio process, start the server in one of FastMCP's HTTP transports:

uvx bowtie-mcp --transport streamable-http --port 8080

This binds to 127.0.0.1:8080 and exposes the recommended Streamable HTTP endpoint at http://127.0.0.1:8080/mcp.

Legacy SSE is also available:

uvx bowtie-mcp --transport sse --port 8080

The SSE endpoint is http://127.0.0.1:8080/sse. During the handshake, FastMCP tells the client to post subsequent messages to the matching http://127.0.0.1:8080/messages/ endpoint.

Authentication

The server authenticates to your Bowtie controller using admin credentials — the same approach used by the Bowtie Terraform provider.

| Variable | Required | Description | |---|---|---| | BOWTIE_HOST | Yes | Controller HTTPS endpoint (e.g., https://bt0.example.com) | | BOWTIE_USERNAME | Yes | Admin email address | | BOWTIE_PASSWORD | Yes | Admin password | | BOWTIE_MCP_SKIP_CONFIRMATION | No | Set to true to skip write confirmation prompts |

Credentials are used by the local MCP server process to authenticate with your controller. They are never sent to or visible by the LLM.

What You Can Do

Ask your LLM things like:

• "List all pending devices and approve the ones from the engineering team"
• "Create a policy that gives the sales team access to the CRM on 10.0.5.0/24 port 443"
• "Why can't device X reach the production database?"
• "Audit our policies for anything overly permissive"
• "Set up DNS for internal.example.com pointing at 10.0.0.53"

Available Tools

Read (30+ tools) — List and inspect users, devices, device groups, user groups, policies, resources, resource groups, DNS configs, sites, collections, block lists, threat categories, controllers, route exclusions, and API keys.

Write (25+ tools) — Create, update, and delete all of the above. All write operations require explicit confirmation before executing (see below).

Guided Workflows (4 prompts): | Prompt | Description | |---|---| | onboard-team | Create a user group, resources, resource group, and access policy | | audit-policies | Review all policies for overly permissive rules | | troubleshoot-access | Diagnose why a user/device can or can't reach a destination | | review-pending-devices | Batch approve or reject pending devices |

Write Confirmation

All write tools use a two-step confirmation pattern. The first call returns a preview of the planned change. Call again with confirm=true to execute. This prevents accidental mutations.

Tool responses are returned as structured JSON-compatible objects rather than pre-serialized JSON strings, so MCP clients can inspect fields directly.

Set BOWTIE_MCP_SKIP_CONFIRMATION=true to bypass this for automation or CI workflows.

Development

git clone https://github.com/bowtieworks/bowtie-mcp.git
cd bowtie-mcp
pip install -e ".[dev]"
pytest

See CONTRIBUTING.md for more details.

License

MIT