payment.detected

Fires the moment a matching transaction is first seen, before it has any confirmations. Useful for showing a payer “we see it, hang tight” — do not treat this as settlement.

Payload (data)

{
  "livemode": false,
  "paymentId": "pay_test_00000000",
  "paymentRequestId": "req_test_00000000",
  "origin": { "type": "link", "id": "lnk_test_00000000", "title": "Sample link" },
  "supporter": { "id": "sup_test_00000000", "handle": "sample_supporter", "message": "Test payment" },
  "asset": "USDC",
  "chain": "base",
  "onchainAmount": "15000000",
  "decimals": 6,
  "confirmations": 0
}

See Webhooks overview for the envelope, headers, and signature verification (shown once, in every supported language) shared by every event type.