Thanks I'm going against that URL through a React app and get the error even if I deploy it to my server. Usually I've been able to email the owners of the requested site and they disable CORS. I mean, if you provide an API then you shouldn't really care about CORS.
Maybe I missed it but what API are you talking about? AFAIK -ck only provides the website for statistics but I could be wrong.
I can't seem to find the owner of solo.ckpool.org. I just hope they are here reading posts.[/quote]-CK is the owner/operator and posts here regularly.