> ## 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.

# SetPrimaryFundingSourceInput

> Input type for setting an account's primary funding source.

**Input object**

Input type for setting an account's primary funding source. The bank account
must belong to the account and be ENABLED.

## Input fields

<ParamField name="bankAccountId" type="UUID!" required>
  The ID of the bank account to set as the primary funding source.
</ParamField>