Pro account holder but not able to access the webinar older than 90 days

What is the api end that can provide me webinars older than 90 days

Hi @rashika.ahuja
As long as the webinar has not been deleted, you should be able to query data from the last 6 months:
https://developers.zoom.us/docs/api/rest/reference/zoom-api/methods/#operation/reportWebinarDetails