ruyiJS

Judgement

What it is

Developer tool

What it does

A Python package that embeds Firefox's SpiderMonkey JavaScript engine and Necko network stack with no renderer, so scripts can run a site's own JavaScript to scrape it or reverse-engineer its checks.

Adopt it when

You need to execute a site's JavaScript, such as signing or token code, from Python without running a full browser.

Watch out

It is about a week old, AGPL-3.0 with a commercial license for closed use, and aimed at defeating bot verification systems.

Ready for

Experimental

Runs as

Library

Built with

C++, Python and SpiderMonkey

How established

New: started under a month ago, latest release v0.3.4.

What the license allows

Use inside your business is unrestricted. If you change it and let customers use it over the internet, you must publish your changes.

Judged on 2026-11-06 from the project's README and GitHub data. The license and age lines are worked out directly.

Built from

Follow it down: ruyiJS → LLVM project → runs on a microchip

How compilers were built, back to punched paper tape

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