You can use /:category to get random JSON responses with a url field which contains a link to a random image of this category.
You can also directly use /:category/:file to retrieve one image. Both .jpg, .png, and .gif are supported.
Use /:category/info for information on the category.
png - Returns a png image/link instead of jpg
See any image that you own the copyright to? Please contact me at support[at]tippy.cafe and I will take down the image.
If this is the case, please make sure you can provide sufficient proof of copyright and ownership.