Abstract: The innovations herein concern flexible and omnichannel progressive jackpot systems. In particular, a hosted gaming service may provide a flexible progressive jackpot system and Application Programming Interface (API) that is compatible and combinable with a variety of different gaming ecosystems, such as land-based gaming environments and online or “iGaming” environments. Specifically, the flexible progressive jackpot API may include a progressive jackpot identifier (PID), a contributor identifier (CID), and/or a contributor type property to aid in the identifying and tracking of contributions made to multiple progressive jackpots, e.g., by multiple players and devices in multiple games across land-based and/or online gaming environments. Each progressive jackpot may be associated with its own properties, such as incremental rate, jackpot reset values, and auto-approve limits.