Stripe uses webhooks to notify application when an event happens in the account. Webhooks are particularly useful for asynchronous events like when a customer’s bank confirms a payment, a customer disputes a charge, a recurring payment succeeds, or when collecting subscription payments etc.
But, does stripe have any webhook to inform application for usage record pricing model?
There is no webhook for usage record today in Stripe's API. This API is used at a higher volume that most APIs and reporting an event for every usage record would likely be unsustainable on your servers and Stripe's.
The best option is to either track the records yourself as you create those or use the summary API: https://stripe.com/docs/api/usage_records/subscription_item_summary_list