| Class | Description | |
|---|---|---|
| Category | Yahoo! Upcoming.org API Category Class. | |
| Country | Yahoo! Upcoming.org API Country class. | |
| Group | Yahoo! Upcoming.org API Group Class. | |
| Metro | Yahoo! Upcoming.org API Metro Class. | |
| State | Yahoo! Upcoming.org API State Class. | |
| uEvent | Yahoo! Upcoming.org API uEvent Class. | |
| UpcomingService | Yahoo! Upcoming.org API Service Class. | |
| User | Yahoo! Upcoming.org API User Class. | |
| Venue | Yahoo! Upcoming.org API Venue Class. |