I made this app a week ago, it will check your stores marked as favourites on TooGoodToGo and check for available boxes on it. If there is one, it will send a notification to one of a few options (gotify, pushbullet, pushover or custom webhook). There are a few options for running it on interval, or one-time (which works well with cron).
I found it pretty useful as plenty of times I forget to check during times a box might be available, or I miss it completely.
I used something like this for a few weeks (using tgtg for home assistant and doing the notification with it). After about 4-6 weeks they forced my account into a ‘needs to verify everytime’ mode where the tgtg integration could not log in again and I had to solve a captcha everytime I started the app. 😐