Vovy reads the exact CORS error, explains which server has to allow your domain, and adds the right headers without opening your API to everyone.
I keep getting a CORS error when my app calls my API, fix it
How it works
- Read the full CORS error: Vovy opens the console and reads the message, like "No 'Access-Control-Allow-Origin' header is present". CORS is the browser checking the API agreed to talk to your site.
- Inspect the preflight request: In the Network tab it finds the OPTIONS request the browser sends first and shows which header the server left out.
- Find who owns the fix: CORS is fixed on the server being called, not in your front end. Vovy tells you if that is your API route, a Supabase edge function, or a third party.
- Add the headers in your code: It has Cursor add Access-Control-Allow-Origin for your real domains only, and handle OPTIONS requests, for example in your edge function.
- Confirm the call works: Vovy reloads, repeats the action, and shows a card with the request now returning 200 and the headers that made it pass.
What you provide
- The page where the error happens
- Your project open in Cursor
What you get
- CORS explained for your case
- Correct headers added server side
- Only your domains allowed
- Verified working request
FAQ
Can't I just allow every origin with *?
For a public, read-only API it is fine. For anything with logins or cookies, list your real domains instead, and * does not work with credentials anyway.
Why does it work in Postman but not the browser?
CORS is a browser rule. Tools like Postman and curl skip it, which is why the error only shows up in your app.
The API is someone else's. What now?
If a third-party API blocks browsers, call it from your own server route or edge function instead, which also keeps its key secret.
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