Z Zise Developers
/
简体中文
Card Issuance › API Reference › Secure Card Details

Unblock CVV

POST /v1/cards/{id}/cvv/unblock scope: cards:write
On behalf of a member · x-on-behalf-of required Requires x-idempotency-key

After repeated failed attempts to view sensitive card details, the upstream blocks CVV (cvv_blocked: true in card details). Previously there was no unlock entry point: sensitive details became permanently inaccessible, and POST /v1/cards/{id}/secure-session revealed the block only at the last step.

No step-up authentication is required: unlocking itself reveals no data. Perform a new real-time lookup after unlocking.

⚠ Rate-limited to 5 calls per member per hour. This calls the upstream, and repeated unlocking has no legitimate use.

⚠ The response only confirms unlocking. The source of truth for cvv_blocked is GET /v1/cards/{id}; query it there. Returning independent copies in two places would eventually diverge.

Path Parameters

FieldTypeRequiredDescription
id string Required Card ID. Accepted with or without the crd_ prefix.
FieldTypeRequiredDescription
x-idempotency-key string Required
x-on-behalf-of string Required

Response

200Unlocked
{
  "unblocked": true
}
400state_invalid: card status does not allow the action. idempotency_key_required.
404not_found: the card does not exist or does not belong to this member/merchant.
429rate_limited: back off according to Retry-After.
Request 
curl -X POST 'https://api.zinfra.vip/v1/cards/{id}/cvv/unblock' \
  -H 'x-auth-token: Bearer $TOKEN' \
  -H 'x-on-behalf-of: $MEMBER_ID' \
  -H 'x-idempotency-key: $IDEMPOTENCY_KEY'
const res = await fetch("https://api.zinfra.vip/v1/cards/{id}/cvv/unblock", {
  method: "POST",
  headers: {
    "x-auth-token": "Bearer $TOKEN",
    "x-on-behalf-of": "$MEMBER_ID",
    "x-idempotency-key": "$IDEMPOTENCY_KEY",
  },
});
// Keep monetary amounts as strings, never numbers.
const data = await res.json();
import requests

res = requests.post(
    "https://api.zinfra.vip/v1/cards/{id}/cvv/unblock",
    headers={
        "x-auth-token": "Bearer $TOKEN",
        "x-on-behalf-of": "$MEMBER_ID",
        "x-idempotency-key": "$IDEMPOTENCY_KEY",
    },
)
# Use Decimal(str(...)) for amounts, not float.
data = res.json()
req, _ := http.NewRequest("POST", "https://api.zinfra.vip/v1/cards/{id}/cvv/unblock",
    nil)
req.Header.Set("x-auth-token", "Bearer $TOKEN")
req.Header.Set("x-on-behalf-of", "$MEMBER_ID")
req.Header.Set("x-idempotency-key", "$IDEMPOTENCY_KEY")
res, err := http.DefaultClient.Do(req)
// Decode amount fields as string, not float64.
HttpRequest req = HttpRequest.newBuilder()
    .uri(URI.create("https://api.zinfra.vip/v1/cards/{id}/cvv/unblock"))
    .header("x-auth-token", "Bearer $TOKEN")
    .header("x-on-behalf-of", "$MEMBER_ID")
    .header("x-idempotency-key", "$IDEMPOTENCY_KEY")
    .method("POST", HttpRequest.BodyPublishers.noBody())
    .build();
// Use String / BigDecimal for amounts, not double.
$ch = curl_init('https://api.zinfra.vip/v1/cards/{id}/cvv/unblock');
curl_setopt_array($ch, [
  CURLOPT_CUSTOMREQUEST => 'POST',
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_HTTPHEADER => [
    'x-auth-token: Bearer $TOKEN',
    'x-on-behalf-of: $MEMBER_ID',
    'x-idempotency-key: $IDEMPOTENCY_KEY',
  ],
]);
$res = curl_exec($ch);
// Use bcmath / strings for amounts, not floatval.
200 
{
  "unblocked": true
}