question

siddharth avatar image
siddharth asked larissaemberds edited

CORS issue for Clover iframe integration

I am getting the following error:

Access to fetch at 'https://token-sandbox.dev.clover.com/v1/tokens' from origin 'https://checkout.sandbox.dev.clover.com' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource. If an opaque response serves your needs, set the request's mode to 'no-cors' to fetch the resource with CORS disabled.
I have instantiated Clover with the public key of the e-commerce API token.
I am using a test merchant.
The first time I tried using the createToken() I got back a token.
But after that even having the same code gives the above-stated error.
I have checked that my code is same as the codepen by Gareth DSouza and I still get the error.

I have also noticed similar issue happening in 2024 for manyothers as well.
I am on a tight deadline, so I would really appreciate a quick response

API Token
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5 Answers

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siddharth avatar image
siddharth answered

Found this codepen and it is facing the same issue as well.
https://codepen.io/gareth-dsouza/pen/RwPjBXJ?editors=1010

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mina12 answered

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ateesdalejr avatar image
ateesdalejr answered

@Siddharth they broke this in sandbox for users of Firefox, which has a stricter cross-origin policy than most other browsers because they applied a patch, but forgot to add it to the CSP tag. My recommendation is to switch to another browser, but this still may be broken for your users in production.

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larissaemberds answered larissaemberds edited

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enochflyn answered

@papa's scooperia If you are testing locally (e.g., using localhost), CORS issues can arise. Ensure that you are testing from a domain that is recognized by the Clover API.

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