I am new in librenms

i want to libreNMS support SMS alert and Email alert???

It supports both email and sms gateways (like Clickatell)

Check out https://docs.librenms.org/#Alerting/Transports/

I have ideasoft sms api …can possible configure in librenms
???

Not sure what “SMS API” is? This all we have for alerting Home - LibreNMS Docs