The WebMCP Challenge is here. Build web apps people and their agents can use together.
We’ve teamed up with Google Chrome, Cloudflare, Shopify, Vercel, Render, and Netlify for a 10-day hackathon.
WebMCP is an experimental open standard that lets web apps expose tools agents can use directly on the page. You can build from scratch or add WebMCP to a site you already have.
Building with ChatGPT Sites? Ask Codex to create a WebMCP-enabled app and deploy it to Sites.
Up for grabs are $35,000 in cash prizes, Codex Micros, ChatGPT Pro subscriptions, and additional prizes from our supporters.
Submit by Sep 3, 2026 at 5 p.m. PT. We’ll select 10 winning projects.
Challenge details and entry
What are you thinking of building?
