# Charge Metrics

Charge Metrics provides a service to access key metrics for rate plan charges in Zuora, for example, Gross MRR, Net MRR, Gross TCV, and Net TCV.

 - [GET /charge-metrics/data/charge-metrics](https://developer.zuora.com/v1-api-reference/older-api/charge-metrics/get_chargemetrics.md): Retrieves key charge metrics about rate plan charges that have changes in a specified time range. The purpose of `fromTimestamp` and `toTimestamp` is to synchronize charge metrics data incrementally.
 - [GET /charge-metrics/data/charge-metrics-discount-allocation-detail](https://developer.zuora.com/v1-api-reference/older-api/charge-metrics/get_chargemetricsdiscountallocationdetails.md): Retrieves discount allocation details about rate plan charges that have changes in a specified time range. The purpose of `fromTimestamp` and `toTimestamp` is to synchronize discount allocation detail