API-first
Webhooks
Value monitoring
B2B
Monitor website changes via API.
Track specific values (prices, stock, text) using CSS selectors. Get a webhook when it changes. No dashboards. No noise. Just data.
Support: email only • Built for automation • Limits are predictable
Create a monitor
curl -X POST https://api.changehook.io/monitor \
-H "Authorization: Bearer sk_live_xxx" \
-H "Content-Type: application/json" \
-d '{
"url": "https://shop.example.com/product/123",
"selector": ".price",
"extract": "text",
"interval": "15m",
"webhook": "https://client.example.com/webhook"
}'Value-based monitoring
Monitor exactly what matters (e.g. “.price”), not the whole page.
Webhooks on change
Push changes into your stack: backend jobs, alerts, automations.
Predictable limits
Clear monthly checks. Hard stop. No surprise bills.
Webhook payload
{
"monitor_id": "uuid",
"url": "https://shop.example.com/product/123",
"changed": true,
"old_value": "€19.99",
"new_value": "€17.99",
"checked_at": "2025-12-27T12:34:56Z"
}