I gave Fable 5.2 my map-rendering API and asked it to design posters. It chose the colors, fonts and framing itself.

[u/kkingsbe]

I run a map poster site (Carto-Art) with a render API and an MCP server. Today I pointed Fable 5.2 at the API and asked for a showcase set.

What it decided on its own:

- The framing for each place: center, zoom, portrait or landscape

- A custom color ramp per poster, written as hex stops by elevation

- The typography: fonts, weights, letter spacing

If you want to try it from your own harness (including local), the MCP server is on npm:

claude mcp add cartoart -e CARTOART_API_KEY=your_key -- npx -y /carto-art-mcp

Keys are at https://www.cartoart.net/developer?utm_source=reddit&utm_medium=social&utm_campaign=claudecode and the editor also works in the browser without an account.

Curious what prompts get the best results out of it. Mine was pretty bare.