There's an API but you have to pay for it. Which I understand on one side, but then: immoscout24 is basicly the biggest player and this is not about consumer goods but one essential good: flats, space to live. So I think it should be mandatory to offer data to everyone who wants to research house & flat pricing/demand data.

2. A generic API for governmental financial transaction data! This would make research so much easiere. There are couple of open data platforms, but look at how scrambled the data is. What is a "financial transaction"? It's basically nothing else then "from, to, amount, reason, category" - I know there's more, but you can break it down, if you want. So, right now every city, district and government is maintaining their own "database". I once tried to analyse EFRE data. Turns out, while this data is basically open and free, every party offers their own weird format, XLSX, CSV and you name it.

I don't see why no one ever tooks the effort to "normalize" such a simple thing - again: I know there's more. But the big picture should simply allow you to create a generic protocol/stream for that kind of data.

Also making an api client : https://voiden.md/

Then again, I probably make much better use of my time, because that doesn't exist.

So an API that let's me post and comment on Reddit (I can't use the official Reddit API because I get banned as I said before)

I don't even know if this is possible. But I'd pay for the service.