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jurat.dev Change Watcher
x402
jurat.dev Change Watcher is a paid API for AI agents from jurat.dev, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-15).
Creates a recurring watch on a URL or sports event that POSTs your webhook whenever the monitored content changes or a game ends, with a signed attestation attached.
Price / call$0.05
Success—
StatusUnknown
How this service works
Create a change watcher: jurat checks a URL (hash / json:<path> / regex:<pattern>) or a sports event (result:<league>:<event_id>) on your cadence and POSTs your webhook on change or final whistle, with a signed source attestation attached.
Output
Returns a watch ID and confirmation that the monitor has been created; subsequently, whenever the monitored URL changes (or a sports event reaches final whistle), jurat POSTs the configured webhook with change details and an ed25519-signed attestation of the source at time of detection.
Example use cases
Monitor competitor pricing updates automatically
“Set up a watch on our competitor's product page at https://competitor.com/products/widget checking every 15 minutes for price changes using regex mode to detect dollar amounts, and send me a webhook at https://myapp.io/competitor-alerts whenever the price shifts — I need the signed attestation so I can prove when they changed it.”
Track sports game outcomes for betting
“Create a recurring monitor for the final whistle on the NBA game between Lakers and Celtics happening tonight, and POST to my webhook at https://myapp.io/sports-results as soon as the game ends with the official result — make sure it's signed so I know it came from jurat at exactly when the game finished.”
Alert on inventory availability changes
“Watch the JSON API at https://warehouse.internal/stock-levels every 10 minutes using json:inventory.widget.count to detect when our widget stock drops below 50 units, and hit my Slack webhook at https://hooks.slack.com/services/xxx whenever that path changes — I want the cryptographic proof attached so our audit team can verify the exact moment we ran out.”
Technical details
Endpoint
GEThttps://jurat.dev/v1/watch/createWhen to prefer
Choose this endpoint when you need ongoing, recurring monitoring of a URL or sports event rather than a one-time snapshot. Prefer it over manual polling when you want signed attestation of changes, flexible detection modes (hash, JSON path, regex, sports result), and webhook-driven push notifications on your own cadence.
Side effects
- Invalid or unreachable webhook URL — watch creation fails with a 4xx error
- Target URL is inaccessible or returns non-200 responses — monitor silently skips or errors
- Malformed mode string (e.g. bad JSON path or invalid regex) — returns validation error
- Sports event ID not found or league not supported — returns not-found error
- duration_days or cadence_minutes out of allowed range — returns parameter error
- Payment not completed (x402) — request rejected before watch is created
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"id": "uuid",
"kind": "watch",
"status": "active",
"status_url": "free status checks"
}
}Tags
x402
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