Card transaction
Fires on every card transaction lifecycle change: authorized (real-time hold), reversed (funds returned) and settled adjustments. Same signature headers as every delivery.
WEBHOOK
Authorizations
Session JWT (from register/login) or API key (pk_...).
X-API-Key: <token> is accepted as an alternative header.
Response
200
Return any 2xx to acknowledge.
Last modified on July 18, 2026