I am setting up a HTML website that will allow me to manage all my websites from one place. I have already setup an up-time monitor, backup logger, and a to-do list. I am know looking at adding some code that will allow me to see if my WordPress websites have updates available. This way I don't need to login to all the websites to see if there are updates available. I would only need to login to the websites that need updating.
I don't want to use commercial stuff like ManageWP if I don't have to. Because, if I did use something like that, I would have to go to their website to access it. Also it would probably cost since I have many websites.
Is this possible at all? If so, some guidance would be appreciated.
One thought I had was that if I could log the updates to a database, then I could just display the database in the website to show updates.