You can generate a key to show a page behind the paywall even though the user is not authenticated. Using a url with this key, the user is able to look at an article, even when the article is behind a paywall. The key is valid in one month from the timestamp embedded in the signature.
Contact us by sending an email to firstname.lastname@example.org telling us why you need this kind of access. This mechanism is typically used by companies monitoring news for clients. We will then create a client ID and a secret for you to use when generating keys.
Creating the key is simple, you can use a script like the following. It is a node.js script, but it easy to port to another language.
For example, a url that gives access to an article can look like this:
(Note: This URL will work until Oct 23 2015)