mxcheck is written in Golang and open source. You can install it by compiling from source or use a precompiled executable for your platform. mxcheck is a single file application without external dependencies.
On Github you can find ready-to-run executables for most common operating systems and platforms like Linux, MacOS or Windows on AMD64 and ARM64.
Just download from Github, extract the archive and run the program from a terminal/command line.
The releases are tested and the latest version has no known bugs.
You can install mxcheck from source by compiling it. With an installed Go compiler you can install it with
go install github.com/steffenfritz/mxcheck