Use this little website to test if a URL is setup correctly to work with CORS.
Shareable link: https://cors-test.codehappy.dev/?url=https%3A%2F%2Fesi.evetech.net%2Flatest%2Funiverse%2Fids%2F%3Fdatasource%3Dtranquility%26language%3Den&origin=https%3A%2F%2Fcors-test.codehappy.dev%2F&method=post
These are the response headers received when making the request.
access-control-allow-credentials: true
access-control-allow-headers: Content-Type,Authorization,If-None-Match,X-User-Agent
access-control-allow-methods: POST,OPTIONS
access-control-allow-origin: *
access-control-expose-headers: Content-Type,Warning,ETag,X-Pages,X-ESI-Error-Limit-Remain,X-ESI-Error-Limit-Reset
access-control-max-age: 600
allow: OPTIONS,POST
cf-cache-status: DYNAMIC
cf-ray: 86bd8a05a06a9c82-IAD
connection: keep-alive
content-length: 58
content-type: application/json; charset=UTF-8
date: Fri, 29 Mar 2024 05:42:53 GMT
server: cloudflare
strict-transport-security: max-age=31536000
vary: Accept-Language
x-esi-error-limit-remain: 99
x-esi-error-limit-reset: 7
x-esi-request-id: 5db368a9-b300-4d33-be8a-f56d9d963ba1
CORS tester was built by @mscccc. The code is available on GitHub. Sponsored by HTML/CSS to Image.