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WEBHOOK
card.frozen
{
  "event": "card.frozen",
  "version": "3.20",
  "eventId": "b9c0d1e2-f3a4-5678-cdef-789012345678",
  "sign": "a1b2c3d4e5f6g7h8i9j0k1l2m3n4o5p6q7r8s9t0",
  "data": {
    "cardId": "crd_9x8y7z6w5v4u",
    "cardholderId": "CH-ABC123DEF456",
    "status": "FROZEN",
    "timestamp": "2026-04-30T14:00:00+00:00"
  }
}

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{
  "event": "card.frozen",
  "version": "3.20",
  "eventId": "b9c0d1e2-f3a4-5678-cdef-789012345678",
  "sign": "a1b2c3d4e5f6g7h8i9j0k1l2m3n4o5p6q7r8s9t0",
  "data": {
    "cardId": "crd_9x8y7z6w5v4u",
    "cardholderId": "CH-ABC123DEF456",
    "status": "FROZEN",
    "timestamp": "2026-04-30T14:00:00+00:00"
  }
}

Body

application/json
​
event
string
Example:

"card.frozen"

​
version
string
Example:

"3.20"

​
eventId
string<uuid>

Unique event ID — use for deduplication

Example:

"b9c0d1e2-f3a4-5678-cdef-789012345678"

​
sign
string

HMAC-SHA256 of the data object using your webhookSecret

Example:

"a1b2c3d4e5f6g7h8i9j0k1l2m3n4o5p6q7r8s9t0"

​
data
object

Response

200

Acknowledge receipt of the event