Show HN: Built an MCP server using Cloudflare's Code Mode pattern
5 hours ago
- #LLM
- #TypeScript
- #MCP
- Local implementation of 'Code Mode' workflow for MCP servers using TypeScript/JavaScript.
- LLMs write code to call a simple HTTP proxy instead of direct tool calls.
- Core insight: LLMs are better at writing code than tool calling.
- Single tool exposed to LLM: execute_code for TypeScript/JavaScript execution.
- HTTP proxy forwards requests to MCP servers via fetch() calls.
- Setup requires Bun, Deno, and an MCP-compatible client.
- Configuration via codemode-config.json and .mcp.json files.
- Example code snippets for listing servers and chaining operations.
- Proxy endpoints for server listing, tool listing, and tool calls.
- Security features include Deno sandbox, timeout, and controlled proxy access.
- Error handling for common issues like Deno installation or permissions.