# Add a subscription product

Adds a product to a customer's existing subscription

## Request[​](#request "Direct link to request")

## Responses[​](#responses "Direct link to Responses")

* 201
* 400
* 401
* 404
* 422

The request has succeeded and a new resource has been created as a result.

The server could not understand the request due to invalid syntax.

401 Unauthorized

404 Not Found

Client error