# Billing Usage metrics and billing information ## Get Monthly Usage Metrics - [POST /rest/v1/billing/monthly-usage](https://omnizon-public-api.redocly.app/openapi/billing/getmonthlyusage.md): Get usage metrics for documents sent, received and total for a specific month and year by VAT ID. ## Get Archive Usage Metrics - [POST /rest/v1/billing/archive-usage](https://omnizon-public-api.redocly.app/openapi/billing/getarchiveusage.md): Get total archive usage in bytes for a company by VAT ID.