This will actually filter both active or non-active.

Also, it's missing the parameters common to all list GETs, such as created/updated date filters, per_page, etc.  
See [Products](https://github.com/TiendaNube/api-docs/blob/coupons_endpoint_api_docs/resources/product.md#get-products) endpoint for a reference, and as a guide for writing style in the explanation column for consistency.