Ensure you are in the desired team before changing billing information. Changes made to a team will affect all users in that team.

There are two billing options:

Prepaid credits: Pre-purchase credits for your team. API consumption will be deducted from this credit balance.
Monthly invoiced billing: Receive an invoice for your API consumption at the end of the month. If you don't have sufficient prepaid credits, your default payment method will be charged.

Monthly invoiced billing is disabled by default. To request this, contact sales@x.ai, or use the contact link on the Billing page:

Manage Billing