A bonusing system for gaming devices provides a bonus award eligible to be won via participating gaming devices. A messaging application programming interface (API) receives wagering event messages in a first message format from third-party servers. A message queue receives wagering event messages from the messaging API in a second message format. A bonusing system server manages award determination for the bonus award. The system is configured to: receive, by the messaging API from a third-party server that manages wagering gaming sessions at a plurality of gaming tables, a first wagering event message indicating a wager event performed by a player at a first gaming table; convert, by the messaging API, the first wagering event message from the first message format to the second message format; transmit the first wagering event message for delivery to the bonusing system server; determine, by the bonusing system server, that the wagering event results in an award of the bonus award based on an output of a random number generator (RNG); and award the bonus award based on the determination.