PocketAPIActivity is a UIActivity subclass that can be used with UIActivityViewController to save NSURLs to Pocket. To use it, simply add [[PocketAPIActivity alloc] init] to the array of activities when you create a UIActivityViewController:

[[UIActivityViewController alloc] initWithActivityItems:@[ [NSURL URLWithString:@"http://google.com"] ] applicationActivities:@[ [[PocketAPIActivity alloc] init] ]];

The activity will add all NSURL activity items to pocket, returning a failure if any of them return an error.

The activity will show up in the view controller only if:

1. There is at least 1 NSURL in the activity items
2. The Pocket iOS app is installed or the user has logged in

This behavior means that you can add the activity to all your UIActivityViewControllers and it will only appear when relevant.