Is there any API available for SLA?

Problem:
Is there any API available for surveillance category-wise or requistions-wise SLA?

Expected outcome:
I want to get SLA data between a specific time range and of particular surveillance category or requisitions

Mostly no, but the RTC data is exposed via API if thatโ€™s good enough.

https://docs.opennms.com/horizon/30/development/rest/rtc.html