Providing device and system agnostic electronic payment tokens

The present disclosure relates to systems, methods, and devices for device and system agnostic payment tokenization for processing payment transactions. In particular, the message system allows a user to initiate a payment transaction with a merchant. For example, one or more implementations involve identifying, in response to a request by a user client-device, a payment authorization number associated with a user account and sending a request for a payment token to a payment network associated with the payment authorization number. One or more embodiments receive a payment token representing the payment authorization number. Additionally, one or more embodiments encrypt the payment token and send the encrypted payment token to the user client-device to provide to a merchant system associated with the merchant.