Watch, the website change monitoring API
Register a URL once and get a signed webhook when it changes.
Private beta on paid plans. Watchers cost no ops.
POST /v2/watchcurl -X POST https://api.enconvert.com/v2/watch \
-H "X-API-Key: sk_your_private_key" \
-H "Content-Type: application/json" \
-d '{
"url": "https://www.enconvert.com/changelog",
"frequency_minutes": 60,
"notify_email": false
}'{
"watcher_id": "wat_791ed7976871477990157a13cfd27feb",
"url": "https://www.enconvert.com/changelog",
"status": "active",
"frequency_minutes": 60,
"diff_mode": "auto",
"next_check_at": "2026-11-11T14:29:57.166558Z"
}{"checked_at": "2026-11-11T14:31:03.539021Z", "has_changes": false, "similarity": 1.0, "render_quality": 1.0, "change_count": 0, "changes": []}A watcher and its first check
The first check sets the baseline. Every later one is diffed against it.
{
"watcher_id": "wat_791ed7976871477990157a13cfd27feb",
"url": "https://www.enconvert.com/changelog",
"status": "active",
"frequency_minutes": 60,
"diff_mode": "auto",
"track_fields": null,
"webhook_url": null,
"notify_email": false,
"consecutive_errors": 0,
"checks_count": 0,
"last_check_at": null,
"next_check_at": "2026-11-11T14:29:57.166558Z",
"created_at": "2026-11-11T14:29:57.166558Z"
}{
"checked_at": "2026-11-11T14:31:03.539021Z",
"has_changes": false,
"similarity": 1.0,
"render_quality": 1.0,
"change_count": 0,
"changes": []
}Real output, captured 2026-11-11. […] marks a cut.
What you send and get
| Field | What it does |
|---|---|
url | The page to watch. Each check re-renders it in headless Chrome, with no stored credentials. |
frequency_minutes | From 60, the hourly floor, to 43,200, which is 30 days. |
diff_mode | Auto, text, structured, tables or metadata. track_fields narrows the diff to the fields you name. |
webhook_url | An HMAC-signed POST when a check detects a change. An email to the owner is optional. |
changes | One record per change, with its section, kind, field, before and after. |
What one watcher replaces
A cron job
The schedule lives with the watcher, hourly at the fastest.
A diffing script
Each good render is diffed against the last good one.
Alarms from bad renders
A blocked or low-scoring render never becomes a baseline or fires a notification.
Your first watcher
Pick a paid plan
Indie, Studio or ProductionRegister a URL
POST /v2/watchReceive the change
has_changes: true
More of the same API
- URL to Markdown APIAny URL as clean Markdown, with a score.
Perceive POST /v2/perceive - Web Scraping APIOne render, every output, each read scored.
Perceive POST /v2/perceive - RAG Ingestion APIA site or a set of files in, one chunked JSONL out.
Ingest POST /v2/ingest - Structured Data Extraction APIYour schema in, exactly that JSON out.
Distill POST /v2/distill - Web Search APIA query in, ranked results and their pages out.
Lookup POST /v2/lookup
Questions about change monitoring
How do I get a webhook when a page changes?
Pass webhook_url when you create the watcher with POST /v2/watch, or add it later with PATCH /v2/watch/{watcher_id}. When a check detects a change, EnConvert sends an HMAC-signed POST to that URL.
How often can it check a page?
frequency_minutes sets the cadence, from 60 (the hard hourly floor) to 43,200 (30 days). The poller scans every 60 seconds, so a check fires within a minute of its scheduled time.
Can I watch only part of a page, like a price or a table?
Yes. track_fields narrows the diff to changes whose section, field or key matches a tracked term, and diff_mode can restrict detection to one strategy such as tables, structured, text or metadata.
Why did my watcher pause itself?
Three consecutive render failures pause a watcher and email the owner if notify_email is on. PATCH it back to active to re-arm the schedule; one successful check resets the error count.
Is Watch generally available?
Not yet. Watch is in private beta: it is callable today with your normal API key on any paid plan, and the request and response shapes can change without notice. The free Founding plan cannot create watchers.
What does it cost?
Watchers cost no ops. A plan holds a number of active watchers instead: 20 on Indie, 100 on Studio and 500 on Production.