ext-apps/examples/quickstart/src/mcp-app.ts at main · modelcontextprotocol/ext-apps · GitHub Skip to content Navigation Menu Sign in Appearance settings * Platform * AI CODE CREATION * GitHub Copilot Write better code with AI * GitHub Copilot app Direct agents from issue to merge * MCP Registry Integrate external tools * DEVELOPER WORKFLOWS * Actions Automate any workflow * Codespaces Instant dev environments * Issues Plan and track work * Code Review Manage code changes * Code Quality Enforce quality at merge * APPLICATION SECURITY * GitHub Advanced Security Find and fix vulnerabilities * Code security Secure your code as you build * Secret protection Stop leaks before they start * EXPLORE * Why GitHub * Documentation * Blog * Changelog * Marketplace View all features * Solutions * BY COMPANY SIZE * Enterprises * Small and medium teams * Startups * Nonprofits * BY USE CASE * App Modernization * DevSecOps * DevOps * CI/CD * View all use cases * BY INDUSTRY * Healthcare * Financial services * Manufacturing * Government * View all industries View all solutions * Resources * EXPLORE BY TOPIC * AI * Software Development * DevOps * Security * View all topics * EXPLORE BY TYPE * Customer stories * Events & webinars * Ebooks & reports * Business insights * GitHub Skills * SUPPORT & SERVICES * Documentation * Customer support * Community forum * Trust center * Partners View all resources * Open Source * COMMUNITY * GitHub Sponsors Fund open source developers * PROGRAMS * Security Lab * Maintainer Community * GitHub Stars * Archive Program * REPOSITORIES * Topics * Trending * Collections * Enterprise * ENTERPRISE SOLUTIONS * Enterprise platform AI-powered developer platform * AVAILABLE ADD-ONS * GitHub Advanced Security Enterprise-grade security features * Copilot for Business Enterprise-grade AI features * Premium Support Enterprise-grade 24/7 support * Pricing Search / Sign in Sign up Appearance settings You signed in with another tab or window. Reload to refresh your session. You signed out in another tab or window. Reload to refresh your session. You switched accounts on another tab or window. Reload to refresh your session. Dismiss alert Uh oh! There was an error while loading. Please reload this page . modelcontextprotocol / ext-apps Public * Notifications You must be signed in to change notification settings * Fork 377 * Star 2.8k * Code * Issues 124 * Pull requests 82 * Discussions * Actions * Projects * Security and quality 0 * Insights Additional navigation options * Code * Issues * Pull requests * Discussions * Actions * Projects * Security and quality * Insights Files Expand file tree main Breadcrumbs * ext-apps * / examples * / quickstart * / src / mcp-app.ts Copy path Blame More file actions Blame More file actions Latest commit   History History History 26 lines (21 loc) · 946 Bytes main Breadcrumbs * ext-apps * / examples * / quickstart * / src / mcp-app.ts Copy path Top File metadata and controls * Code * Blame 26 lines (21 loc) · 946 Bytes Raw Copy raw file Download raw file Open symbols panel Edit and raw actions 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 import { App } from "@modelcontextprotocol/ext-apps"; // Get element references const serverTimeEl = document.getElementById("server-time")!; const getTimeBtn = document.getElementById("get-time-btn")!; // Create app instance const app = new App({ name: "Get Time App", version: "1.0.0" }); // Handle tool results from the server. Set before `app.connect()` to avoid // missing the initial tool result. app.ontoolresult = (result) => { const time = result.content?.find((c) => c.type === "text")?.text; serverTimeEl.textContent = time ?? "[ERROR]"; }; // Wire up button click getTimeBtn.addEventListener("click", async () => { // `app.callServerTool()` lets the UI request fresh data from the server const result = await app.callServerTool({ name: "get-time", arguments: {} }); const time = result.content?.find((c) => c.type === "text")?.text; serverTimeEl.textContent = time ?? "[ERROR]"; }); // Connect to host app.connect(); Footer (c) 2026 GitHub, Inc. Footer navigation * Terms * Privacy * Security * Status * Community * Docs * Contact * Manage cookies * Do not share my personal information You can’t perform that action at this time.