Any references to ‘…../plugins/wppizza-gateway-paypal//ipn/ipn.php …’ in the plugin – if using v5.4 – are old and wrong and I’ll need to take them out to avoid confusion (the double backslash would not have caused any issues either way and is just a typo). Sorry about that.

For v5.4 + The correct webhook url is

http[s]://[your-domain]/?wppizza-listener=paypalipn (note the ‘ipn’ at the end)

(NOT http://xxxxxxxxx.de/kassel-nord/?wppizza-listener=paypal)

Depending on your exact settings, you may not even have to set that in your paypal account , but it’ll be safer to do this anyway

Hope that helps

the 405 is fine here – it’s just old documentation that has been amended over the years as paypal changed their integrations.
Note to self: I need to update this sooner rather than later to avoid further confusions

(the 405 relates to the fact nothing is being posted to this url when you go there directly in your browser, whereas an ipn response will – and must have – post data)

I’ll see if I can make this more elegant too if one simply wants to see if this script is working without actually sending any data.

At the end of the day what really counts is this:
Set the mode in the paypal plugin to test and make a test. if it works it’s all good , if not check the debug.log
If it works in test , it will work in live (as it’s the same) provided you are using the right credentials – i.e email address and/or REST credentials