Access to fetch has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header 
is present on the requested resource. If an opaque response serves your needs, set the 
request's mode to 'no-cors' to fetch the resource with CORS disabled.

There are lots of questions online about CORS policy being blocked, but I surprisingly have not seen any answers for my question.

I am creating an NFT app that requires fetching resources from many different locations. As such, I have no access to the servers sending the json response for the token uri's, so I have no control over their CORS policy. How can I solve CORS policy error with no access to backend? I just want to get the data, and have no issue when simply requesting for the resource directly through the browser, or postman but obviously fetch api does not like it.