curl https://api.up2data.ai/v1/webhook-deliveries/wh_stest_a1b2c3d4e5f6g7h8 \
  -H "X-API-Key: $UP2DATA_API_KEY"

{
  "data": {
    "id": "wh_stest_a1b2c3d4e5f6g7h8",
    "event": "signal.test",
    "status": "delivered",
    "attempts": 1,
    "url": "https://app.example.com/hooks/up2data",
    "created_at": "2026-07-21T12:00:00.000Z",
    "delivered_at": "2026-07-21T12:00:01.200Z",
    "last_error": null
  },
  "meta": { "creditsUsed": 0, "billed": false, "reason": "success", "requestId": "req_whget1" }
}