API - Character Avatar Tailed with Numbers

Maybe this is just a function of AWS, but why do my character avatar lookups in the API return things like this? "Avatar: <a href="https://s3.amazonaws.com/files.d20.io/images/55213992/jzhbkFoMmBMuIMoCLHXdiw/med.png?1527966685" rel="nofollow">https://s3.amazonaws.com/files.d20.io/images/55213992/jzhbkFoMmBMuIMoCLHXdiw/med.png?1527966685</a>" I can easily enough strip off the question mark and the numbers thereafter so that I can get it to display properly in the chat, but why are they there in the first place?

I believe they are a cache buster value. You can just append #.png to a url to force the [x](url) syntax to interpret it as an image instead of stripping the end. If you output an img tag it shouldn’t be a problem.&nbsp; Incidentally, all Roll20 images have that on the end (with a few bizarre exceptions).&nbsp;