Equal (EQ)

https://h.api.crmls.org/RESO/OData/OpenHouse?$filter=OpenHouseStartTime%20eq%20OpenHouseEndTime&$count=true

Not Equal (NE)

https://h.api.crmls.org/RESO/OData/OpenHouse?$filter=OpenHouseStartTime%20ne%20OpenHouseEndTime&$count=true

Less Than (LT)

https://h.api.crmls.org/RESO/OData/OpenHouse?$filter=ModificationTimestamp+lt+now()

Less Than or Equal (LE)

https://h.api.crmls.org/RESO/OData/OpenHouse?$filter=(OpenHouseStartTime%20le%201400)&$count=true

Greater Than (GT)

https://h.api.crmls.org/RESO/OData/Member?$filter=ModificationTimestamp+gt+now()

Greater Than or Equal (GE)

https://h.api.crmls.org/RESO/OData/Member?$filter=date(ModificationTimestamp)+ge+date(OriginatingSystemModificationTimestamp)