Know when the law you rely on changes.
Subscribe to a jurisdiction or corpus and get a webhook or email when it changes, down to the exact sections added, amended, or removed.
The source catalog, in the dashboard
How a change reaches you
- On each refresh
- We notify you when a source publishes new, changed, or removed law. That follows the schedule the source already runs on, so there is no live polling in between.
- What arrives
- A POST carrying X-Vaquill-Event: board.updated. Test deliveries send board.test instead, so your handler can tell them apart.
- Verifying it
- Add a signing secret and every delivery carries X-Vaquill-Signature: sha256=<hmac> over the raw body. The secret is stored encrypted and never returned.
Subscribe once, get every change.
A board is a source you can watch (a state's statutes, the Federal Register, the eCFR). A watch is your subscription to one, on a webhook, an email, or both.
request.sh
curl -X POST https://api.vaquill.ai/api/v1/watches \
-H "Authorization: Bearer $VAQUILL_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"corpusType": "state",
"state": "wa",
"channel": "webhook",
"webhookUrl": "https://example.com/hooks/vaquill",
"webhookSecret": "a-secret-only-you-know"
}'Then, when Washington statutes refresh:
webhook delivery
POST https://example.com/hooks/vaquill
X-Vaquill-Event: board.updated
X-Vaquill-Signature: sha256=<hmac over the raw body>
{
"event": "board.updated",
"corpusType": "state",
"state": "wa",
"boardLabel": "Washington statutes",
"rowsAdded": 4,
"rowsUpdated": 2,
"rowsDeleted": 0,
"refreshLogId": 4412,
"changes": [
{
"changeKind": "amended",
"actId": "wa-regs-296-17-31018",
"citation": "WAC 296-17-31018",
"title": "Retrospective rating"
}
],
"changesOverflowCount": 0,
"deliveryId": "9f2b1e0a-...:4412",
"firedAt": "2026-08-07T04:10:00Z"
}For any amended change with hasDiff: true, a second call returns the section's exact text before and after, so you can show what moved instead of sending someone back to reread the whole section.
Stop polling for changes you might miss.
310 watchable sources today, free to subscribe: authenticated and rate-limited, not credit-metered.