pscat MCP server

pscat

pscat is a PostScript interpreter written in Rust. PostScript is a programming language for drawing pages; pscat runs your program and shows the picture as it is drawn, in a live window, or renders it to PNG, SVG or PDF. It also runs in a browser tab, and it ships with PostScript libraries for making art: generative patterns, paint and watercolor, printmaking, lettering, charts and more. It was built for fun, not as a Ghostscript replacement, though it aims for broad PostScript coverage over time.

pscatlabs.github.io/pscat has the docs, the full gallery, a specimen of every font, and a live playground that runs the interpreter in your browser, no install.

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Install

cargo install pscat          # pscat and pscat-mcp, from crates.io
pscat fonts install          # optional: the full font catalog, as font packs
npm install pscat            # from 0.6.2: the wasm renderer for browsers and Node

Or download a ready-built binary for macOS, Linux or Windows from the releases page (no Rust needed). Getting started has the details. Then:

pscat --png out.png some_file.ps

Quick start from a checkout

You need a stable Rust toolchain.

cargo run -- --page 500x500 examples/sierpinski.ps   # watch it draw, live
cargo run -- --png out.png examples/sierpinski.ps    # render to a PNG instead
cargo run -- -i                                      # REPL + window: type PostScript, watch it draw

A taste of the REPL:

PS> 40 2 add =
42
PS> mark 1 2 3
PS<4> pstack
3
2
1
-mark-

To try it with nothing installed, open the playground. New to PostScript? Start with Learn PostScript. More sample programs live in examples/, and finished pieces in gallery/.

Guides

Everything else is in docs/guides/:

Shortened. The full README is on GitHub.