Hii I have built a netlify function to get the JWT token "Access to fetch at 'function URL ’ from origin ‘localhost’ has been blocked by CORS policy: Response to preflight request doesn’t pass access control check: No ‘Access-Control-Allow-Origin’ header is present on the requested resource. If an …

You skipped over the relevant part and went to background functions. The relevant part was this: [image] [Support Guide] Handling CORS on Netlify Instead, you’d have to set the correct headers from within the Function or the Edge Function. Depending on your setup, the correct way to do this woul…

[image] [Support Guide] Handling CORS on Netlify Support Guides Last reviewed by Netlify Support in July 2025 CORS stands for Cross Origin Resource Sharing. It is a HTTP header that tells the browsers how to handle a request from a certain origin to for an ass…

I have tried multiple things first, it blocks the localhost like https://127.0.0.1 then I hosted my code to a site but still same issue [Screenshot 2024-02-23 at 7.09.22 PM]

Did you read the guide I linked? It has all the info you need. Section 3.2.2 to be specific based on your use-case.

[quote=“[Support Guide] Handling CORS on Netlify, post:1, topic:107739”] 3.2.2 [/quote] can you share more about this 3.2.2 Create a regular Netlify Function and send your request to that > so I have created the function From within this Function, make a request to the Background Function > …

URL has been blocked by CORS policy, using Netlify Functions

Support

hrishikesh February 23, 2024, 1:03pm 2

Also, based on your error message:

Looks like you’re trying to connect to localhost, which is not what you should be doing.

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URL has been blocked by CORS policy, using Netlify Functions

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