Paypal's "Security header is not valid"
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by Paypal
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Published on 2009-11-11T02:46:27Z
Indexed on
2010/06/16
8:22 UTC
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I'm implementing the Express Checkout?
I have no problem with the first two steps:SetExpressCheckout
and GetExpressCheckout
,but met the "Security header is not valid" at DoExpressCheckout
.
The API credentials are the same!
I've fixed it by changing the $environment
to live
in DoExpressCheckout
.(The difference is that it'll use https://api.sandbox.paypal.com/nvp/ instead of https://api-3t.$environment.paypal.com/nvp)
But why?
Is there something wrong with https://api-3t.$environment.paypal.com/nvp?
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