The Fetch API can be used in public and backend code for fetching resources from 3rd party services using HTTPS. The API is an implementation of the standard Javascript Javascript Fetch function. The implementation differs slightly depending on where it's being used. Common errors when using the fetch() function are described here along with possible solutions. Certain CORS (Cross-Origin Resource Sharing) requests are restricted when originating from a browser. To fix this issue you can either use the HTTPS protocol to fetch the requested resources or you can turn off SSL.