Add basic-server-angular example

Author: Avcharov

examples/basic-server-angular/.gitignore

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+node_modules/
+dist/

examples/basic-server-angular/README.md

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+# Example: Basic Server (Angular)
+
+![Screenshot](screenshot.png)
+
+An MCP App example with an Angular UI.
+
+> [!TIP]
+> Looking for a vanilla JavaScript example? See [`basic-server-vanillajs`](https://github.com/modelcontextprotocol/ext-apps/tree/main/examples/basic-server-vanillajs)!
+
+## MCP Client Configuration
+
+Add to your MCP client configuration (stdio transport):
+
+```json
+{
+  "mcpServers": {
+    "basic-angular": {
+      "command": "npx",
+      "args": [
+        "-y",
+        "--silent",
+        "--registry=https://registry.npmjs.org/",
+        "@modelcontextprotocol/server-basic-angular",
+        "--stdio"
+      ]
+    }
+  }
+}
+```
+
+### Local Development
+
+To test local modifications, use this configuration (replace `~/code/ext-apps` with your clone path):
+
+```json
+{
+  "mcpServers": {
+    "basic-angular": {
+      "command": "bash",
+      "args": [
+        "-c",
+        "cd ~/code/ext-apps/examples/basic-server-angular && npm run build >&2 && node dist/index.js --stdio"
+      ]
+    }
+  }
+}
+```
+
+## Overview
+
+- Tool registration with a linked UI resource
+- Angular UI using signals and zoneless change detection
+- App communication APIs: [`callServerTool`](https://modelcontextprotocol.github.io/ext-apps/api/classes/app.App.html#callservertool), [`sendMessage`](https://modelcontextprotocol.github.io/ext-apps/api/classes/app.App.html#sendmessage), [`sendLog`](https://modelcontextprotocol.github.io/ext-apps/api/classes/app.App.html#sendlog), [`openLink`](https://modelcontextprotocol.github.io/ext-apps/api/classes/app.App.html#openlink)
+
+## Key Files
+
+- [`server.ts`](server.ts) - MCP server with tool and resource registration
+- [`mcp-app.html`](mcp-app.html) / [`src/mcp-app.ts`](src/mcp-app.ts) - Angular standalone component using MCP App SDK
+
+## Getting Started
+
+```bash
+npm install
+npm run dev
+```
+
+## How It Works
+
+1. The server registers a `get-time` tool with metadata linking it to a UI HTML resource (`ui://get-time/mcp-app.html`).
+2. When the tool is invoked, the Host renders the UI from the resource.
+3. The UI uses the MCP App SDK API to communicate with the host and call server tools.
+
+## Build System
+
+This example bundles into a single HTML file using Vite with `vite-plugin-singlefile` and `@analogjs/vite-plugin-angular` — see [`vite.config.ts`](vite.config.ts). This allows all UI content to be served as a single MCP resource. Alternatively, MCP apps can load external resources by defining [`_meta.ui.csp.resourceDomains`](https://modelcontextprotocol.github.io/ext-apps/api/interfaces/app.McpUiResourceCsp.html#resourcedomains) in the UI resource metadata.

examples/basic-server-angular/main.ts

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+/**
+ * Entry point for running the MCP server.
+ * Run with: npx @modelcontextprotocol/server-basic-react
+ * Or: node dist/index.js [--stdio]
+ */
+
+import { createMcpExpressApp } from "@modelcontextprotocol/sdk/server/express.js";
+import type { McpServer } from "@modelcontextprotocol/sdk/server/mcp.js";
+import { StdioServerTransport } from "@modelcontextprotocol/sdk/server/stdio.js";
+import { StreamableHTTPServerTransport } from "@modelcontextprotocol/sdk/server/streamableHttp.js";
+import cors from "cors";
+import type { Request, Response } from "express";
+import { createServer } from "./server.js";
+
+/**
+ * Starts an MCP server with Streamable HTTP transport in stateless mode.
+ *
+ * @param createServer - Factory function that creates a new McpServer instance per request.
+ */
+export async function startStreamableHTTPServer(
+  createServer: () => McpServer,
+): Promise<void> {
+  const port = parseInt(process.env.PORT ?? "3001", 10);
+
+  const app = createMcpExpressApp({ host: "0.0.0.0" });
+  app.use(cors());
+
+  app.all("/mcp", async (req: Request, res: Response) => {
+    const server = createServer();
+    const transport = new StreamableHTTPServerTransport({
+      sessionIdGenerator: undefined,
+    });
+
+    res.on("close", () => {
+      transport.close().catch(() => {});
+      server.close().catch(() => {});
+    });
+
+    try {
+      await server.connect(transport);
+      await transport.handleRequest(req, res, req.body);
+    } catch (error) {
+      console.error("MCP error:", error);
+      if (!res.headersSent) {
+        res.status(500).json({
+          jsonrpc: "2.0",
+          error: { code: -32603, message: "Internal server error" },
+          id: null,
+        });
+      }
+    }
+  });
+
+  const httpServer = app.listen(port, (err) => {
+    if (err) {
+      console.error("Failed to start server:", err);
+      process.exit(1);
+    }
+    console.log(`MCP server listening on http://localhost:${port}/mcp`);
+  });
+
+  const shutdown = () => {
+    console.log("\nShutting down...");
+    httpServer.close(() => process.exit(0));
+  };
+
+  process.on("SIGINT", shutdown);
+  process.on("SIGTERM", shutdown);
+}
+
+/**
+ * Starts an MCP server with stdio transport.
+ *
+ * @param createServer - Factory function that creates a new McpServer instance.
+ */
+export async function startStdioServer(
+  createServer: () => McpServer,
+): Promise<void> {
+  await createServer().connect(new StdioServerTransport());
+}
+
+async function main() {
+  if (process.argv.includes("--stdio")) {
+    await startStdioServer(createServer);
+  } else {
+    await startStreamableHTTPServer(createServer);
+  }
+}
+
+main().catch((e) => {
+  console.error(e);
+  process.exit(1);
+});

examples/basic-server-angular/mcp-app.html

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+<!DOCTYPE html>
+<html lang="en">
+<head>
+  <meta charset="UTF-8">
+  <meta name="viewport" content="width=device-width, initial-scale=1.0">
+  <meta name="color-scheme" content="light dark">
+  <title>Get Time App</title>
+  <link rel="stylesheet" href="/src/global.css">
+</head>
+<body>
+  <app-root></app-root>
+  <script type="module" src="/src/mcp-app.ts"></script>
+</body>
+</html>

examples/basic-server-angular/package.json

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+{
+  "name": "@modelcontextprotocol/server-basic-angular",
+  "version": "1.0.1",
+  "type": "module",
+  "description": "Basic MCP App Server example using Angular",
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/modelcontextprotocol/ext-apps",
+    "directory": "examples/basic-server-angular"
+  },
+  "license": "MIT",
+  "main": "dist/server.js",
+  "types": "dist/server.d.ts",
+  "bin": {
+    "mcp-server-basic-angular": "dist/index.js"
+  },
+  "files": [
+    "dist"
+  ],
+  "exports": {
+    ".": {
+      "types": "./dist/server.d.ts",
+      "default": "./dist/server.js"
+    }
+  },
+  "scripts": {
+    "build": "tsc --noEmit && cross-env INPUT=mcp-app.html vite build && tsc -p tsconfig.server.json && bun build server.ts --outdir dist --target node && bun build main.ts --outfile dist/index.js --target node --external \"./server.js\" --banner \"#!/usr/bin/env node\"",
+    "watch": "cross-env INPUT=mcp-app.html vite build --watch",
+    "serve": "bun --watch main.ts",
+    "start": "cross-env NODE_ENV=development npm run build && npm run serve",
+    "dev": "cross-env NODE_ENV=development concurrently \"npm run watch\" \"npm run serve\"",
+    "prepublishOnly": "npm run build"
+  },
+  "dependencies": {
+    "@angular/common": "^21.0.0",
+    "@angular/core": "^21.0.0",
+    "@angular/forms": "^21.0.0",
+    "@angular/platform-browser": "^21.0.0",
+    "@modelcontextprotocol/ext-apps": "^1.0.0",
+    "@modelcontextprotocol/sdk": "^1.24.0",
+    "cors": "^2.8.5",
+    "express": "^5.1.0",
+    "rxjs": "^7.8.1",
+    "tslib": "^2.8.0",
+    "zod": "^4.1.13"
+  },
+  "devDependencies": {
+    "@analogjs/vite-plugin-angular": "^2.2.3",
+    "@angular-devkit/build-angular": "^21.0.0",
+    "@angular/compiler": "^21.0.0",
+    "@angular/compiler-cli": "^21.0.0",
+    "@types/cors": "^2.8.19",
+    "@types/express": "^5.0.0",
+    "@types/node": "22.10.0",
+    "concurrently": "^9.2.1",
+    "cross-env": "^10.1.0",
+    "typescript": "^5.9.3",
+    "vite": "^6.0.0",
+    "vite-plugin-singlefile": "^2.3.0"
+  }
+}

examples/basic-server-angular/server.ts

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+import { registerAppResource, registerAppTool, RESOURCE_MIME_TYPE } from "@modelcontextprotocol/ext-apps/server";
+import { McpServer } from "@modelcontextprotocol/sdk/server/mcp.js";
+import type { CallToolResult, ReadResourceResult } from "@modelcontextprotocol/sdk/types.js";
+import fs from "node:fs/promises";
+import path from "node:path";
+
+// Works both from source (server.ts) and compiled (dist/server.js)
+const DIST_DIR = import.meta.filename.endsWith(".ts")
+  ? path.join(import.meta.dirname, "dist")
+  : import.meta.dirname;
+
+/**
+ * Creates a new MCP server instance with tools and resources registered.
+ */
+export function createServer(): McpServer {
+  const server = new McpServer({
+    name: "Basic MCP App Server (Angular)",
+    version: "1.0.0",
+  });
+
+  // Two-part registration: tool + resource, tied together by the resource URI.
+  const resourceUri = "ui://get-time/mcp-app.html";
+
+  // Register a tool with UI metadata. When the host calls this tool, it reads
+  // `_meta.ui.resourceUri` to know which resource to fetch and render as an
+  // interactive UI.
+  registerAppTool(server,
+    "get-time",
+    {
+      title: "Get Time",
+      description: "Returns the current server time as an ISO 8601 string.",
+      inputSchema: {},
+      _meta: { ui: { resourceUri } }, // Links this tool to its UI resource
+    },
+    async (): Promise<CallToolResult> => {
+      const time = new Date().toISOString();
+      return { content: [{ type: "text", text: time }] };
+    },
+  );
+
+  // Register the resource, which returns the bundled HTML/JavaScript for the UI.
+  registerAppResource(server,
+    resourceUri,
+    resourceUri,
+    { mimeType: RESOURCE_MIME_TYPE },
+    async (): Promise<ReadResourceResult> => {
+      const html = await fs.readFile(path.join(DIST_DIR, "mcp-app.html"), "utf-8");
+      return {
+        contents: [{ uri: resourceUri, mimeType: RESOURCE_MIME_TYPE, text: html }],
+      };
+    },
+  );
+
+  return server;
+}

examples/basic-server-angular/src/global.css

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+:root {
+  color-scheme: light dark;
+
+  /*
+   * Fallbacks for host style variables used by this app.
+   * The host may provide these (and many more) via the host context.
+   */
+  --color-text-primary: light-dark(#1f2937, #f3f4f6);
+  --color-text-inverse: light-dark(#f3f4f6, #1f2937);
+  --color-text-info: light-dark(#1d4ed8, #60a5fa);
+  --color-background-primary: light-dark(#ffffff, #1a1a1a);
+  --color-background-inverse: light-dark(#1a1a1a, #ffffff);
+  --color-background-info: light-dark(#eff6ff, #1e3a5f);
+  --color-ring-primary: light-dark(#3b82f6, #60a5fa);
+  --border-radius-md: 6px;
+  --border-width-regular: 1px;
+  --font-sans: ui-sans-serif, system-ui, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Symbol', 'Noto Color Emoji';
+  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, 'Liberation Mono', 'Courier New', monospace;
+  --font-weight-normal: 400;
+  --font-weight-bold: 700;
+  --font-text-md-size: 1rem;
+  --font-text-md-line-height: 1.5;
+  --font-heading-3xl-size: 2.25rem;
+  --font-heading-3xl-line-height: 1.1;
+  --font-heading-2xl-size: 1.875rem;
+  --font-heading-2xl-line-height: 1.2;
+  --font-heading-xl-size: 1.5rem;
+  --font-heading-xl-line-height: 1.25;
+  --font-heading-lg-size: 1.25rem;
+  --font-heading-lg-line-height: 1.3;
+  --font-heading-md-size: 1rem;
+  --font-heading-md-line-height: 1.4;
+  --font-heading-sm-size: 0.875rem;
+  --font-heading-sm-line-height: 1.4;
+
+  /* Spacing derived from host typography */
+  --spacing-unit: var(--font-text-md-size);
+  --spacing-xs: calc(var(--spacing-unit) * 0.25);
+  --spacing-sm: calc(var(--spacing-unit) * 0.5);
+  --spacing-md: var(--spacing-unit);
+  --spacing-lg: calc(var(--spacing-unit) * 1.5);
+
+  /* App accent color (customize for your brand) */
+  --color-accent: #2563eb;
+  --color-text-on-accent: #ffffff;
+}
+
+* {
+  box-sizing: border-box;
+}
+
+html, body {
+  font-family: var(--font-sans);
+  font-size: var(--font-text-md-size);
+  font-weight: var(--font-weight-normal);
+  line-height: var(--font-text-md-line-height);
+  color: var(--color-text-primary);
+}
+
+h1 {
+  font-size: var(--font-heading-3xl-size);
+  line-height: var(--font-heading-3xl-line-height);
+}
+h2 {
+  font-size: var(--font-heading-2xl-size);
+  line-height: var(--font-heading-2xl-line-height);
+}
+h3 {
+  font-size: var(--font-heading-xl-size);
+  line-height: var(--font-heading-xl-line-height);
+}
+h4 {
+  font-size: var(--font-heading-lg-size);
+  line-height: var(--font-heading-lg-line-height);
+}
+h5 {
+  font-size: var(--font-heading-md-size);
+  line-height: var(--font-heading-md-line-height);
+}
+h6 {
+  font-size: var(--font-heading-sm-size);
+  line-height: var(--font-heading-sm-line-height);
+}
+
+code, pre, kbd {
+  font-family: var(--font-mono);
+  font-size: 1em;
+}
+
+b, strong {
+  font-weight: var(--font-weight-bold);
+}