Is there a feed or some endpoint to dowload latest build?

I would like to download latest nighty build via script. Something like https://www.heidisql.com/builds/latest32.exe

There is no such link yet.

You could do a regular expression search for the first occurence of builds\/heidisql32\.r\d+\.exe on the download page?

Oh I just recall there is one: https://www.heidisql.com/latest_build.php

... and for completeness, you can choose 32 or 64bit:

• https://www.heidisql.com/latest_build.php?bits=32
• https://www.heidisql.com/latest_build.php?bits=64