# Sources

- [Startpoint Called](/midpoint-documentation/sources/startpoint-called.md): Listens for an invocation of a Midpoint-deployed startpoint.
- [EVM Event Emitted](/midpoint-documentation/sources/evm-event-emitted.md)
- [Cron Job Triggered](/midpoint-documentation/sources/cron-job-triggered.md): Triggers a midpoint on a regular interval defined by a crontab.