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| 1 | +import { McpServer } from "@modelcontextprotocol/sdk/server/mcp.js"; |
| 2 | +import { z } from "zod"; |
| 3 | +import { WebStandardStreamableHTTPServerTransport } from "@modelcontextprotocol/sdk/server/webStandardStreamableHttp.js"; |
| 4 | + |
| 5 | +const server = new McpServer({ |
| 6 | + name: "Hello MCP Server", |
| 7 | + version: "1.0.0" |
| 8 | +}); |
| 9 | + |
| 10 | +server.registerTool( |
| 11 | + "hello", |
| 12 | + { |
| 13 | + description: "Returns a greeting message", |
| 14 | + inputSchema: { name: z.string().optional() } |
| 15 | + }, |
| 16 | + async ({ name }) => { |
| 17 | + return { |
| 18 | + content: [ |
| 19 | + { |
| 20 | + text: `Hello, ${name ?? "World"}!`, |
| 21 | + type: "text" |
| 22 | + } |
| 23 | + ] |
| 24 | + }; |
| 25 | + } |
| 26 | +); |
| 27 | + |
| 28 | +const transport = new WebStandardStreamableHTTPServerTransport(); |
| 29 | +server.connect(transport); |
| 30 | + |
| 31 | +const corsHeaders = { |
| 32 | + "Access-Control-Allow-Origin": "*", |
| 33 | + "Access-Control-Allow-Methods": "GET, POST, DELETE, OPTIONS", |
| 34 | + "Access-Control-Allow-Headers": |
| 35 | + "Content-Type, Accept, mcp-session-id, mcp-protocol-version", |
| 36 | + "Access-Control-Expose-Headers": "mcp-session-id", |
| 37 | + "Access-Control-Max-Age": "86400" |
| 38 | +}; |
| 39 | + |
| 40 | +function withCors(response: Response): Response { |
| 41 | + for (const [key, value] of Object.entries(corsHeaders)) { |
| 42 | + response.headers.set(key, value); |
| 43 | + } |
| 44 | + return response; |
| 45 | +} |
| 46 | + |
| 47 | +export default { |
| 48 | + fetch: async (request: Request, _env: Env, _ctx: ExecutionContext) => { |
| 49 | + if (request.method === "OPTIONS") { |
| 50 | + return new Response(null, { headers: corsHeaders }); |
| 51 | + } |
| 52 | + return withCors(await transport.handleRequest(request)); |
| 53 | + } |
| 54 | +}; |
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