{
"id": "evt_01JABCDEF",
"api_version": "2026-10-01",
"created_at": "2023-11-07T05:31:56Z",
"livemode": true,
"partner_id": "<string>",
"data": {
"object": {
"id": "pay_01JABCDEF",
"object": "payment",
"amount": 1,
"currency": "EUR",
"amount_authorized": 1,
"amount_captured": 1,
"amount_refunded": 1,
"amount_disputed": 1,
"amount_capturable": 1,
"reference": "<string>",
"metadata": {},
"version": 123,
"created_at": "2023-11-07T05:31:56Z",
"livemode": true,
"amount_mismatch": true,
"checkout_session": "<string>",
"customer": "<string>",
"description": "<string>",
"payment_method": {
"type": "card",
"brand": "visa",
"last4": "<string>",
"exp_month": 123,
"exp_year": 123,
"stored_payment_method": "<string>"
},
"last_payment_error": {
"code": "payment_declined",
"decline_code": "insufficient_funds",
"message": "<string>"
},
"authorized_at": "2023-11-07T05:31:56Z",
"captured_at": "2023-11-07T05:31:56Z",
"canceled_at": "2023-11-07T05:31:56Z",
"updated_at": "2023-11-07T05:31:56Z"
},
"related": {}
}
}API Reference
Kalixo event delivery
Kalixo POSTs an Event to every enabled webhook endpoint subscribed to its
type. Verify the Kalixo-Signature header, answer with any 2xx within
10 seconds, then process asynchronously. Deliveries are retried with
exponential backoff for about 3 days. Deduplicate on id; ignore events
whose data.object.version is lower than what you already have.
WEBHOOK
event
{
"id": "evt_01JABCDEF",
"api_version": "2026-10-01",
"created_at": "2023-11-07T05:31:56Z",
"livemode": true,
"partner_id": "<string>",
"data": {
"object": {
"id": "pay_01JABCDEF",
"object": "payment",
"amount": 1,
"currency": "EUR",
"amount_authorized": 1,
"amount_captured": 1,
"amount_refunded": 1,
"amount_disputed": 1,
"amount_capturable": 1,
"reference": "<string>",
"metadata": {},
"version": 123,
"created_at": "2023-11-07T05:31:56Z",
"livemode": true,
"amount_mismatch": true,
"checkout_session": "<string>",
"customer": "<string>",
"description": "<string>",
"payment_method": {
"type": "card",
"brand": "visa",
"last4": "<string>",
"exp_month": 123,
"exp_year": 123,
"stored_payment_method": "<string>"
},
"last_payment_error": {
"code": "payment_declined",
"decline_code": "insufficient_funds",
"message": "<string>"
},
"authorized_at": "2023-11-07T05:31:56Z",
"captured_at": "2023-11-07T05:31:56Z",
"canceled_at": "2023-11-07T05:31:56Z",
"updated_at": "2023-11-07T05:31:56Z"
},
"related": {}
}
}Authorizations
Secret key, kc_sk_test_... or kc_sk_live_.... Server-side only.
Headers
t=<unix seconds>,v1=<hex HMAC-SHA256 of '<t>.<raw body>'>
Body
application/json
Example:
"evt_01JABCDEF"
Available options:
checkout_session.completed, checkout_session.expired, payment.authorized, payment.captured, payment.partially_captured, payment.failed, payment.canceled, payment.expired, payment.amount_updated, payment.amount_mismatch, payment.fraud_reported, capture.failed, refund.succeeded, refund.failed, dispute.created, dispute.updated, dispute.funds_withdrawn, dispute.won, dispute.lost, payment_method.attached, payment_method.updated, payment_method.detached Example:
"2026-10-01"
Show child attributes
Show child attributes
Response
200
Accepted.