maybe this is not the right place to ask about this, but I don't know where to ask this question. So, for suggestions on where to ask, I would also be grateful. I have been looking for a way to fetch active NFT listings of a specified collection on the most popular marketplaces like OpenSea, Blur, Rarible, etc., but I didn't find an API to do so, except for the OpenSea API. The problem here is that it is only for OpenSea, and I read that getting an API key is difficult.
Does anybody know a good way to do so, or a website that can be easily web scraped for the same effect?