Where can I find information about the various versions of the NVP API?

[orienio]

Where can I find information about the various versions of the NVP API? Is there a changlog that describes the differences?

[MTS_Narendra]

Dear @orienio 

Thank you for posting to the PayPal community.

To find the NVP API details, please refer to the following document: https://developer.paypal.com/api/nvp-soap/nvp/

However, I would like to inform you that the NVP/SOAP integration method is considered legacy and some API have been deprecated. While we still support existing legacy integrations, we encourage you to explore our newer solutions for any new integrations you may be starting.

For any other technical queries or concerns, please create an MTS ticket via -  https://www.paypal-support.com/s/?language=en_US with detailed information. We will be happy to assist you.

Sincerely,
Narendra Nath Laha
Global Technical Support
PayPal, Inc.

[orienio]

Thanks @MTS_Narendra,

However, I can't see any information about the various versions of NVP API on the page you linked. For example, one is able to set a version `VERSION=200` when interacting with the API. What are valid version numbers? What are the differences between version numbers?