Pens with API calls stopped working

I’ve been returning to some of my older work (from last year) and noticed that all my Codepen projects involving API calls don’t work any more. I’m not sure when this happened but all the pens were working when I initially created them. I did want to go back to them anyway as they were quite old but I have no idea what’s gone wrong with the calls but it seems strange that they’ve all failed when they initially worked just fine?

I think it’s an http vs. https issue. I changed http to https in your Wikipedia viewer and it worked fine.

Yeah, I think codepen recently moved from http to https.