Write and Deploy Public MCP Server

Hi ;) Ynon Perek We Start at 10:00

MCP Server REST API get_tools() run_tool(tool_name) HTTP Streaming Server Sent Events Command line (stdio)

MCP Client VS Code ChatGPT Web Interface Claude Desktop

what's the weather today? => I don't know BUT if you run this code and give the result I will know and tell you get_weather()

=> MCP - decouple tools --- agent

Intro & Tools
- What is a public MCP Server
- Tools: Official MCP TypeScript SDK + Cloudflare Agents SDK
- https://zod.dev
- Create the project: npm create cloudflare@latest -- my-mcp-server --template=cloudflare/ai/demos/remote-mcp-authless
- Update @modelcontextprotocol/sdk to the latest version
- https://github.com/modelcontextprotocol/servers
Run in dev mode
- npm run dev
- npx @modelcontextprotocol/inspector
- Connect: http://localhost:8787/mcp
- Connect: http://localhost:8787/sse
Add state

type State = { log: Array<string> };

export class MyMCP extends McpAgent<Env, State, {}> {
    initialState: State = {
        log: [] as Array<string>,
    }

    ...
    this.setState({ log: [...this.state.log, text] })

Build something useful
- AI logger
- Use to log or notify important events during development
Publish the tool
- npm run deploy
- demo: Use the tool from VS Code
Add persistent data
- npx wrangler kv namespace create MCP_LOG
- add to code:
```
interface Env {
      MCP_LOG: KVNamespace;  
}
```
Authentication
- How it works https://github.com/cloudflare/ai/blob/main/demos/remote-mcp-github-oauth/src/index.ts
- How it looks from VS Code https://code.visualstudio.com/blogs/2025/06/12/full-mcp-spec-support
Q & A

ynonp/webinar-mcp.md

Write and Deploy Public MCP Server