WebMCP — Control the Wheel with AI Agents
WebMCP lets this site hand its actions to an AI agent running in your browser. Instead of guessing where to click, an agent can call the wheel's tools directly — set the entries, spin, and read the winner.
What is WebMCP?
WebMCP (Web Model Context Protocol) is a browser API — document.modelContext (formerly navigator.modelContext) — that lets a website declare structured, callable tools to an AI agent. The agent reads the tool's name, description, and parameters, then calls it like a function, instead of taking a screenshot and trying to click the right pixel.
It is an early W3C Web Machine Learning Community Group draft. As of 2026 it ships natively in Microsoft Edge and is in an origin trial in Chrome; in other browsers the integration simply stays dormant until support arrives.
How it works on Spin and Wheel
Every wheel on this site — the name picker, yes/no, number, letter and Twister wheels, and the name-pack pages — registers a small set of tools when your browser supports WebMCP. The tools drive the same wheel you see on screen: setting entries updates the canvas, and spinning opens the winner modal exactly as a normal spin would.
Nothing changes for ordinary visitors. When no WebMCP-capable agent is present, registration is a harmless no-op and the page behaves like any other.
Available tools
Each wheel exposes these four tools:
| Tool | What it does | Input |
|---|---|---|
get_entries |
Returns the current list of entries on the wheel. | None |
set_entries |
Replaces all entries with a new list — each string becomes one wheel segment. | entries: string[] |
spin_wheel |
Spins the wheel and returns the randomly selected winner. Can optionally set new entries before spinning. | entries?: string[] |
get_winner |
Returns the most recent winner. | None |
How to use it
1. Use a WebMCP-capable browser
Open any wheel in Microsoft Edge 147+ or Chrome 149+. On Chrome you may need to enable the flag at chrome://flags/#enable-webmcp-testing. The badge at the top of this page tells you whether your current browser is ready.
2. Open a wheel and bring an agent
Visit a wheel page and use an in-browser AI agent (the browser's built-in assistant or an agent extension). It automatically discovers the wheel's tools — no setup, accounts, or API keys.
3. Ask in plain language
Tell the agent what you want. It picks the right tool, fills in the parameters, and the wheel responds on screen — entries update, the wheel spins, and the winner is read back to you.
Example prompts
- “Put Pizza, Sushi, and Tacos on the wheel and spin it.”
- “What entries are on the wheel right now?”
- “Spin the wheel and tell me who won.”
Privacy
WebMCP tools run entirely in your browser. They read and change only the wheel on the page you have open — no data is sent to any server, and the integration adds no extra tracking. The wheel has no backend.
Try it on the wheel
Open the name wheel and let an agent take it for a spin.
Open the wheel