Cloudflare One CASB MCP server

This server implements the Model Context Protocol (MCP) with Cloudflare OAuth integration, allowing you to create remote MCP connections through Cloudflare's infrastructure. It provides a template that will be hosted at your assigned server-name.mcp.cloudflare.com domain with basic tools that you can customize to meet your specific requirements.

Installation Prerequisites

Before setting up the MCP server, you need to configure the necessary resources and credentials:

Setting Up Secrets

Set up the required Cloudflare OAuth credentials using Wrangler:

wrangler secret put CLOUDFLARE_CLIENT_ID
wrangler secret put CLOUDFLARE_CLIENT_SECRET

These commands will prompt you to enter your Cloudflare OAuth credentials securely.

Creating a KV Namespace

You'll need to create a KV namespace to store OAuth-related data:

wrangler kv:namespace create "OAUTH_KV"

After running this command, you'll receive a KV namespace ID that should be added to your Wrangler configuration file.

Deployment

Once you've set up your secrets and KV namespace, you can deploy the MCP server:

npx wrangler deploy

This command deploys your MCP server to your workers.dev domain, making it accessible for remote connections.

Testing Your Deployment

After deployment, you can test your MCP server using the MCP Inspector tool:

npx @mcp/inspector https://your-worker-name.workers.dev

Replace your-worker-name with your actual Workers subdomain.

Customizing Your MCP Server

The template includes basic tools located in apps/template-start-here/src/tools/logpush.tools.ts that you can modify to implement your specific functionality requirements.

How to install this MCP server

For Claude Code

To add this MCP server to Claude Code, run this command in your terminal:

claude mcp add-json "cloudflare-one-casb" '{"remoteUrl":"https://cloudflare-one-casb.mcp.cloudflare.com","needsAuth":true}'

See the official Claude Code MCP documentation for more details.

For Cursor

There are two ways to add an MCP server to Cursor. The most common way is to add the server globally in the ~/.cursor/mcp.json file so that it is available in all of your projects.

If you only need the server in a single project, you can add it to the project instead by creating or adding it to the .cursor/mcp.json file.

Adding an MCP server to Cursor globally

To add a global MCP server go to Cursor Settings > Tools & Integrations and click "New MCP Server".

When you click that button the ~/.cursor/mcp.json file will be opened and you can add your server like this:

{
    "mcpServers": {
        "cloudflare-one-casb": {
            "remoteUrl": "https://cloudflare-one-casb.mcp.cloudflare.com",
            "needsAuth": true
        }
    }
}

Adding an MCP server to a project

To add an MCP server to a project you can create a new .cursor/mcp.json file or add it to the existing one. This will look exactly the same as the global MCP server example above.

How to use the MCP server

Once the server is installed, you might need to head back to Settings > MCP and click the refresh button.

The Cursor agent will then be able to see the available tools the added MCP server has available and will call them when it needs to.

You can also explicitly ask the agent to use the tool by mentioning the tool name and describing what the function does.

For Claude Desktop

To add this MCP server to Claude Desktop:

1. Find your configuration file:

• macOS: ~/Library/Application Support/Claude/claude_desktop_config.json
• Windows: %APPDATA%\Claude\claude_desktop_config.json
• Linux: ~/.config/Claude/claude_desktop_config.json

2. Add this to your configuration file:

{
    "mcpServers": {
        "cloudflare-one-casb": {
            "remoteUrl": "https://cloudflare-one-casb.mcp.cloudflare.com",
            "needsAuth": true
        }
    }
}

3. Restart Claude Desktop for the changes to take effect