PayPal APIs : up and running /
Russell, Matthew A.
Sebastopol, Calif. : O'Reilly,
c2012.
PayPal API overview -- Express checkout (including mobile express checkout) -- Express checkout for digital goods -- Adaptive payments (simple, parallel, and chained payments) -- Website payments pro (direct payment) -- Instant payment notifications (IPNs) -- Overview of tweet relevance -- Mobile Payment libraries (MPLs).
PayPal (Firm)
Electronic funds transfers.
Electronic commerce.
Application program interfaces (Computer software)