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This guide is only relevant for the Web integration.

If your checkout page is using the Content-Security-Policy header, you'll need to add a few things to your allowlist.

PolicyOriginNotes
script-src*.primer.iorequired
frame-src*.primer.iorequired
style-src*.primer.iorequired
style-src'unsafe-inline'required
connect-src*.primer.iorequired
frame-src*.3dsecure.ioFor 3DS
frame-src*.cardinalcommerce.comFor 3DS
frame-srcc.paypal.comFor PayPal Payments
child-srcc.paypal.comFor PayPal Payments
script-srcc.paypal.comFor PayPal Payments