CORS on work guesser / roles?

[massanf]

I am getting CORS 'No Access-Control-Allow-Origin header' error when I POST for work guesser and performer roles from server. Other requests like composers are working fine.

const url = `https://api.openopus.org/dyn/work/guess?works=${encodeURIComponent(blah)}`
let request = new XMLHttpRequest();
request.open("POST", url, true);
request.send();

Am I doing something wrong or is this intended behaviour? Should I fork and create my own API?
My project depends on this API so any help would be greately appreciated! Thanks in advance.

[sou-chon]

try to use a client app like postman to circumvent the same origin policy