MarketPress: PayPal API Signature Error

Alright, so I swapped out the test PayPal account signature/credentials with the actual ones we’re going to use and now it’s not working in either Sandbox or Live. I’m getting the same “10002 – Security error – Security header is not valid” error.

I saw this post over at https://www.x.com/people/PP_MTS_Patrick/blog/2011/06/08/10002–security-header-is-not-valid which says:

A “10002 – Security Header is Not Valid” error means you’re submitting the API credentials to the wrong environment.

If you’re submitting your Live API credentials to the Sandbox endpoint it will return the 10002 error. If you submit the Sandbox API credentials to the Live endpoint it will also return a 10002 error. The reason for that is because the Live and Sandbox environments are completely separate from each other so the separate environments will not recognize the others API credentials.

The Live endpoint URL’s are:

NVP –
https://api-3t.paypal.com/nvp
https://api.paypal.com/nvp

SOAP –
https://api-3t.paypal.com/2.0/
https://api.paypal.com/2.0/

The Sandbox endpoint URL’s are:

NVP –
https://api-3t.sandbox.paypal.com/nvp
https://api.sandbox.paypal.com/nvp

SOAP-
https://api.sandbox.paypal.com/2.0/
https://api-3t.sandbox.paypal.com/2.0/

If your shopping cart service has a “Test” or “Sandbox” mode you will want to disable it if you have your Live account credentials set inside of it or enable it if you’re using your Sandbox credentials.

Thoughts?