1. A method comprising: at a multi-tenant communication platform system: providing a digital pass messaging application programming interface (API) of the platform system; receiving a digital pass delivery request from a first external system of a first platform account of the platform system, through the digital pass messaging API; responsive to the digital pass delivery request from the first external system, the platform system retrieving device information of a destination endpoint specified in the digital pass delivery request, the device information indicating that the destination endpoint has a first operating system, wherein the first operating system is different from a second operating system, and wherein the first operating system has a first digital pass format; based on the device information, selecting the first digital pass format from a set of digital pass formats including at least the first digital pass format and a different second digital pass format, and obtaining a digital pass in the first digital pass format; and transmitting the digital pass in the first digital pass format from the platform system to a system of the destination endpoint, the system of the destination endpoint being external to the platform system, wherein the digital pass in the first digital pass format is a digital pass for a digital pass application of the system of the destination endpoint.