Give Claude a place to design.
Claude writes remarkable interface code, straight into a chat transcript. Prototyper gives Claude a canvas instead: connect Claude Code over MCP and its designs appear as real, running apps on a shared surface, next to your notes, sketches, and briefs.
Connect Claude Code in one command
Over MCP, on the Claude subscription you already pay for.
Claude designs on the canvas
Real React, running live, arranged spatially instead of buried in a transcript.
Steer by pointing
Select a shape, leave a sticky note, and Claude sees the same surface you do.
Claude plus your team
Multiplayer canvas, viewers always free.
Prototyper is an independent product that works with Anthropic’s Claude via open protocols (MCP). Claude is a trademark of Anthropic; we are not affiliated with or endorsed by Anthropic.
Frequently asked questions
- Can Claude design UI?
- Yes, well. Claude models write strong interface code. What they lack in a chat window is a place to run it and a way for you to steer visually. That is what the canvas adds.
- How do I connect Claude Code?
- One command adds Prototyper as an MCP server to Claude Code. The docs walk through it in about two minutes.
- Does this use my Claude subscription or a separate API key?
- Your subscription. Bring your own agent; Prototyper is the workspace, not the model.
Try it on the canvas
Free to start, no credit card. Bring the agent you already have.