New API Option Provides Faster Integration and Powerful New Features for Shift4 ISV Partners ALLENTOWN, Pa. and LAS VEGAS — April 25, 2019 — (PRWeb) — Shift4 Payments, the leader in secure payment processing solutions, today announced that their new RESTful application program interface (API) is available to their existing integration partners and for all… Continue reading Shift4 Payments Announces General Availability of New RESTful API