Building a Remote MCP Server on Cloudflare (Without Auth)
@ChrisTowles
About Building a Remote MCP Server on Cloudflare (Without Auth)
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Config
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Overview
What is Building a Remote MCP Server on Cloudflare (Without Auth)?
Building a Remote MCP Server on Cloudflare (Without Auth) is an example repository for deploying a remote MCP server on Cloudflare Workers without requiring authentication. It is intended for developers who want to quickly set up a server that exposes tools via the Model Context Protocol (MCP) and connect it to clients like the Cloudflare AI Playground or Claude Desktop.
How to use Building a Remote MCP Server on Cloudflare (Without Auth)?
Deploy the server using the provided "Deploy to Workers" button or by running npm create cloudflare@latest -- my-mcp-server --template=cloudflare/ai/demos/remote-mcp-authless. Customize tools by editing the init() method in src/index.ts using this.server.tool(...). The server listens for SSE connections at the deployed URL.
Key features of Building a Remote MCP Server on Cloudflare (Without Auth)
- Deploy without authentication on Cloudflare Workers.
- Add custom tools via the server's
this.server.tool(...). - Connect to Cloudflare AI Playground (remote client).
- Connect to Claude Desktop using mcp-remote proxy.
- Use SSE transport for remote MCP connections.
Use cases of Building a Remote MCP Server on Cloudflare (Without Auth)
- Prototype an MCP tool that performs calculations and test it in the Cloudflare AI Playground.
- Provide a remote calculator tool to Claude Desktop for quick access.
- Deploy a server with custom data retrieval tools for use with any MCP client supporting SSE.
FAQ from Building a Remote MCP Server on Cloudflare (Without Auth)
What dependencies are required?
The server runs on Cloudflare Workers and can be deployed via the provided button or npm create cloudflare. No additional runtime dependencies beyond the Workers platform are needed.
Does this server support authentication?
No, this example is explicitly built without authentication. It is intended for development or internal use where authentication is not required.
Where does the server data live?
The server is stateless and runs on Cloudflare Workers. Tools defined in src/index.ts can access external data, but the server itself does not store data.
What transport protocol does it use?
The server uses SSE (Server-Sent Events) at the /sse endpoint.
How do I connect local MCP clients?
Local clients like Claude Desktop can connect using the mcp-remote proxy, which relays SSE to a local MCP client.
Frequently asked questions
What dependencies are required?
The server runs on Cloudflare Workers and can be deployed via the provided button or `npm create cloudflare`. No additional runtime dependencies beyond the Workers platform are needed.
Does this server support authentication?
No, this example is explicitly built without authentication. It is intended for development or internal use where authentication is not required.
Where does the server data live?
The server is stateless and runs on Cloudflare Workers. Tools defined in `src/index.ts` can access external data, but the server itself does not store data.
What transport protocol does it use?
The server uses SSE (Server-Sent Events) at the `/sse` endpoint.
How do I connect local MCP clients?
Local clients like Claude Desktop can connect using the `mcp-remote` proxy, which relays SSE to a local MCP client.
Basic information
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