Remote MCP Server on Cloudflare with Stainless

Remote MCP servers require OAuth, so this flow implements a local version of the OAuth redirects, but instead accepts theAPI token and any other client configuration options that you'd need to instantiate your TypeScript client.

Usage

The recommended way to use this project is to use the below "deploy to cloudflare" button to use this repo as a template for generating a server.

Develop locally

# install dependencies
npm install

# run locally
npm run dev

You should be able to open http://localhost:8787/ in your browser

Connect the MCP inspector to your server

To explore your new MCP api, you can use the MCP Inspector.

Start it with npx @modelcontextprotocol/inspector
Within the inspector, switch the Transport Type to SSE and enter http://localhost:8787/sse as the URL of the MCP server to connect to, and click "Connect"
You will navigate to a (mock) user/password login screen. Input any email and pass to login.
You should be redirected back to the MCP Inspector and you can now list and call any defined tools!

Connect Claude Desktop to your local MCP server

The MCP inspector is great, but we really want to connect this to Claude! Follow Anthropic's Quickstart and within Claude Desktop go to Settings > Developer > Edit Config to find your configuration file.

Open the file in your text editor and replace it with this configuration:

{
  "mcpServers": {
    "teardown_mcp_api": {
      "command": "npx",
      "args": ["mcp-remote", "http://localhost:8787/sse"]
    }
  }
}

This will run a local proxy and let Claude talk to your MCP server over HTTP

When you open Claude a browser window should open and allow you to login. You should see the tools available in the bottom right. Given the right prompt Claude should ask to call the tool.

Deploy to Cloudflare

If you want to manually deploy this server (e.g. without the "deploy to cloudflare" button)

npx wrangler@latest kv namespace create remote-mcp-server-oauth-kv
Follow the guidance to add the kv namespace ID to wrangler.jsonc
npm run deploy

Call your newly deployed remote MCP server from a remote MCP client

Just like you did above in "Develop locally", run the MCP inspector:

npx @modelcontextprotocol/inspector@latest

Then enter the workers.dev URL (ex: worker-name.account-name.workers.dev/sse) of your Worker in the inspector as the URL of the MCP server to connect to, and click "Connect".

You've now connected to your MCP server from a remote MCP client.

Connect Claude Desktop to your remote MCP server

Update the Claude configuration file to point to your workers.dev URL (ex: worker-name.account-name.workers.dev/sse) and restart Claude

{
  "mcpServers": {
    "teardown_mcp_api": {
      "command": "npx",
      "args": ["mcp-remote", "https://worker-name.account-name.workers.dev/sse"]
    }
  }
}

Debugging

Should anything go wrong it can be helpful to restart Claude, or to try connecting directly to yourMCP server on the command line with the following command.

npx mcp-remote http://localhost:8787/sse

In some rare cases it may help to clear the files added to ~/.mcp-auth

rm -rf ~/.mcp-auth

Remote MCP Server on Cloudflare with Stainless