To a single coupon codes promotion rule, send a GET request to the /api/coupon_codes_promotion_rules/:id endpoint, where id is the ID of the resource that you want to retrieve.
Request
GET https://yourdomain.commercelayer.io/api/coupon_codes_promotion_rules/:id
Example
The following request fetches the coupon codes promotion rule identified by the id "xYZkjABcde":