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Freeze a card to block spend temporarily, then unfreeze to re-enable it. Freezing is reversible (unlike termination).
Card endpoints use the same base URL and API key as the rest of the API, and are signature-gated: send X-Numero-Signature and X-Numero-Signature-Version: v2 as well. See Request signing.

Endpoint

Signature required: Yes

Headers

Path parameters

Freeze

Unfreeze

Response

Returns the updated card with its new status (Frozen or Active).