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Available from API version 2026-05-27.curie onwards.
Triggered when an invoice transitions to the open status, i.e. it has been finalized and is now awaiting payment. Limited to usage and prepayment invoices. Use this to record the new invoice in your own systems before payment is attempted.

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Response body parameters

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id
string
required
Unique event identifier (starts with evt_).
​
timestamp
string
required
ISO 8601 timestamp when the event was created.
​
topic
literal
required
Always invoice.created for this event.
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context
object
required
Event-specific data containing related resource IDs.
{
  "id": "evt_abc123def456ghi789jkl012",
  "timestamp": "2026-01-15T10:30:00.000Z",
  "topic": "invoice.created",
  "context": {
    "invoice": "inv_abc123def456ghi789jkl012"
  }
}