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Request

Use a key with cards:write and a card ID from your company’s card list.
To unfreeze, send {"status":"active"} to the same endpoint.

Confirm status

Read the card list again and display the confirmed status. Keep the previous status visible with a pending indicator if a provider result is unresolved. A network error alone does not prove that the requested change failed. These controls do not cancel a card or withdraw its balance. Card cancellation is not part of the current public API. Live controls require production access and a supported provider integration.