Hey Product Hunt 👋 I'm Andrew, and I built Gesso.

AI can write a whole website now, but what you get back is code or a picture. You can't grab the heading and move it. So I built a canvas that any AI can design on, made of real HTML and CSS, where every layer it makes is yours to change by hand.

How it works:

Download Gesso (Mac) and sign in.
Paste one address into ChatGPT, Claude, Cursor or any MCP agent: https://www.gesso.online/mcp
Ask for a deck, a website, a poster. Watch it build live, then drag, restyle and export.

Every image in the gallery was made this way, by an agent, on the canvas.

Agents read a built-in style guide before they design (minimal, Swiss, editorial, dark tech, bold, brutalist, playful), so you get something with a point of view instead of the usual generated look.

It's a beta: free to try with 150 agent calls, and the first 100 founding members get a year for $60.

What would help most: tell me what you asked your agent to make, and where it fell short. I'll be here all day replying.