{
"id": "msg_4Kp8s1",
"type": "theme.spiking",
"createdAt": "2026-09-30T14:50:00.000Z",
"data": {
"theme": {
"id": "44444444-4444-4444-8444-444444444444",
"name": "Checkout errors"
},
"category": {
"id": "55555555-5555-4555-8555-555555555555",
"name": "Payments"
},
"window": {
"from": "2026-09-29T14:50:00.000Z",
"to": "2026-09-30T14:50:00.000Z"
},
"count": 24,
"previousCount": 6,
"share": 12.5,
"surveyIds": []
}
}theme.spiking
A theme spiked: at least 10 responses in the last 24 hours and at least twice the 24 hours before. Checked hourly; once a day per theme and subscription. Answer 2xx within 30 seconds. A failed delivery is retried with backoff (30 s, 2 min, 10 min, 1 h, 6 h); a subscription answered 410 Gone ends.
{
"id": "msg_4Kp8s1",
"type": "theme.spiking",
"createdAt": "2026-09-30T14:50:00.000Z",
"data": {
"theme": {
"id": "44444444-4444-4444-8444-444444444444",
"name": "Checkout errors"
},
"category": {
"id": "55555555-5555-4555-8555-555555555555",
"name": "Payments"
},
"window": {
"from": "2026-09-29T14:50:00.000Z",
"to": "2026-09-30T14:50:00.000Z"
},
"count": 24,
"previousCount": 6,
"share": 12.5,
"surveyIds": []
}
}Authorizations
An API key (utk_live_...) or an app's OAuth access token (uto_...).
Headers
The message id (the body's id); the same on every retry and resend.
Unix seconds when this attempt was signed.
Standard Webhooks: v1, then the base64 HMAC-SHA256 of "{webhook-id}.{webhook-timestamp}.{body}" with the whsec_ secret (decoded). During a secret rotation two signatures, space separated.
The event, as in the body's type.
1 for the first try; retries count up.
Body
The body of theme.spiking.
The message id: the same value as the webhook-id header, kept on every retry and resend.
theme.spiking When the spike was measured.
"2026-09-30T10:00:00.000Z"
A theme spike: at least 10 responses in the last 24 hours and at least twice the 24 hours before (with responses in that window at all), checked hourly, at most once a day per theme and subscription.
Show child attributes
Show child attributes
{
"theme": {
"id": "44444444-4444-4444-8444-444444444444",
"name": "Checkout errors"
},
"category": {
"id": "55555555-5555-4555-8555-555555555555",
"name": "Payments"
},
"window": {
"from": "2026-09-29T14:50:00.000Z",
"to": "2026-09-30T14:50:00.000Z"
},
"count": 24,
"previousCount": 6,
"share": 12.5,
"surveyIds": []
}
Response
Received.