check_balance when the balance is all you need.
Parameters
| Parameter | Type | Required | Description |
|---|---|---|---|
card_id | string | Yes | The card ID |
Returns
Whenstatus is details, the response includes the PAN, CVV, expiry, balance, card status, and a billing address for online purchases. Never write the PAN or CVV to logs, error reports, or analytics; they appear only in the human-readable text, never in the structured output. The call may instead return approval_required with an approvalId, which you resolve with approve_request after asking the user.