> For the complete documentation index, see [llms.txt](https://developer.firmhouse.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://developer.firmhouse.com/graphql-api/api-reference/objects/apply-promotion-to-subscription-input.md).

# ApplyPromotionToSubscriptionInput

### Fields

#### clientMutationId ([String](/graphql-api/api-reference/objects/string.md))

A unique identifier for the client performing the mutation.

#### promotionId ([ID](/graphql-api/api-reference/objects/id.md)!)

ID of the promotion to apply.

#### subscriptionId ([ID](/graphql-api/api-reference/objects/id.md)!)

ID of the subscription to apply the promotion to.

#### validatePromotion ([Boolean](/graphql-api/api-reference/objects/boolean.md))

Whether to validate the promotion before applying it.