Systems and methods for providing push payment transaction processing in a card-present environment are provided. The described push payment transactions processing enables a user having any form factor visiting at a merchant location accepting payment cards to perform push payment transactions. Indeed, push payment transactions can be supported from physical point-of-sale (“POS”) or originate from POS terminals. During the described push payment transaction processing, a merchant acquirer can receive, from a POS terminal, a push payment transaction request comprising at least a transaction type indicating a push payment transaction, transaction information, authorization data, and sender information. In response to receiving the push payment transaction request, the merchant acquirer can generate an application programming interface (API) request package comprising the push payment transaction request; and communicate the API request package to an intermediary platform connected to a payment network.