# Set Payment Systems

Sets payment systems supported for a promotion. If the list is empty, the promotion will apply to all payment systems. If the promotion is read-only (read_only = true), you cannot call this method.

  NoticeThis API call does not contain the project_id path-parameter, so you need to use the API key that is valid in all the company’s projects to set up authorization.

Endpoint: PUT /merchants/{merchant_id}/promotions/{promotion_id}/payment_systems
Version: 2.0
Security: basicAuth

## Path parameters:

  - `merchant_id` (integer, required)
    Merchant ID.

  - `promotion_id` (integer, required)
    Promotion ID.

## Request fields (application/json):

  - `payment_systems` (array)
    Payment systems.

  - `payment_systems.id` (integer)
    Payment system ID.

  - `payment_systems.name` (string)
    Payment system name.


## Response 204 fields