> ## Documentation Index
> Fetch the complete documentation index at: https://docs.fluz.app/llms.txt
> Use this file to discover all available pages before exploring further.

# UpdateBankCardPreferredMerchantCategoryCodeInput

> Input type for updating a bank card's preferred merchant category code.

**Input object**

Input type for updating a bank card's preferred merchant category code.

## Input fields

<ParamField name="bankCardId" type="UUID!" required>
  The ID of the bank card to update.
</ParamField>

<ParamField name="preferredMerchantCategoryCode" type="String!" required>
  The preferred merchant category code for the bank card.
</ParamField>