Fix: Resolve MCP SDK compatibility issues and improve tool handlers

package.json

@@ -64,7 +64,7 @@
     },
     "homepage": "https://github.com/adeze/raindrop-mcp#readme",
     "dependencies": {
-        "@modelcontextprotocol/sdk": "^1.18.0",
+        "@modelcontextprotocol/sdk": "^1.20.1",
         "axios": "^1.12.2",
         "dotenv": "^17.2.2",
         "esm": "^3.2.25",
@@ -73,7 +73,7 @@
         "openapi-fetch": "^0.14.0",
         "rate-limiter-flexible": "^7.3.1",
         "simple-oauth2": "^5.1.0",
-        "zod": "^4.1.9",
+        "zod": "^3.23.8",
         "zod-to-json-schema": "^3.24.6"
     },
     "devDependencies": {
@@ -93,4 +93,4 @@
         "node": ">=18.0.0",
         "bun": ">=1.0.0"
     }
-}
+}

scripts/print-tools.mjs

@@ -0,0 +1,8 @@
+import { RaindropMCPService } from "../build/services/raindropmcp.service.js";
+
+const svc = new RaindropMCPService();
+const server = svc.getServer();
+const tools = (server)._tools || [];
+for (const t of tools) {
+  console.log(JSON.stringify({ name: t.name, type: t.inputSchema?.type, inputSchema: t.inputSchema }, null, 2));
+}

src/server.ts

@@ -332,8 +332,16 @@ const server = http.createServer(async (req, res) => {
                     return;
                 }
 
-                // delegate to transport
-                await transport.handleRequest(req as any, res as any, body);
+                // delegate to transport and ensure response is flushed
+                try {
+                    await transport.handleRequest(req as any, res as any, body);
+                } catch (e) {
+                    logger.error('Transport handleRequest error', e);
+                    if (!res.headersSent) {
+                        res.writeHead(500, { 'Content-Type': 'application/json' });
+                        res.end(JSON.stringify({ jsonrpc: '2.0', error: { code: -32603, message: 'Transport error' }, id: body?.id ?? null }));
+                    }
+                }
             } catch (error) {
                 logger.error('Error handling optimized Streamable HTTP request:', error);
                 if (!res.headersSent) {