Hi, im trying to have a bit fun with the API but after fetching /post.json I can't use (jpeg_url, file_url, source) as src tag on the <img> element. Also opening those links (jpeg_url, file_url) in new tab seems to open post but doing same in incognito opens the image (?). Im using React btw.
My guess is that there are some cookies that chrome detects as XSS and blocks the request or yande.re itself checks for some cookie and outputs raw image / post.
Any help?

hotlink protection

And you shouldn't hotlink other sites' resource regardless if there is a protection to begin with

So how can I use images from yande.re?

You download and host them on your own server.