APIs
Watcher
The Watcher API for real-time job change, funding, and company monitoring alerts
The Watcher API allows you to “subscribe” to live updates about people or companies based on your own criteria. Set watches, get notified via webhooks, and always act on fresh data.
How Watcher works
01
Set a watch on any company or professional profile.
02
Crustdata checks on your 24-hour cadence, on data indexed from the public web.
03
You receive a webhook the moment something changes.
Update Prospect Lists to ensure prospect details are up to date for more accurate targeting.
Instant notifications that can act as triggers for quicker and relevant outreach.
Keep candidate databases up to date.
Be the first to reach out to a potential candidate by monitoring for changes that can be used as triggers for outreach.
Track specific signals that can be used as triggers for outreach to get more leads.
Monitor founders you are interested in to know their activities in realtime.
Monitor portfolio companies to get realtime view of their performance and identify any risk or growth indicators.
Monitor your champions and get live notifications when they shift companies, departments or get a promotion.
Keep your database updated with live auto updates ensuring you always have the most accurate and comprehensive data.
8+ event types include role or title change, company change, funding round, headcount growth, new job postings, and social posts.
A role change webhook delivers the change
Use the delivered payload shape to update your system with the current role and the recorded change.
{
“profile_url”: “<professional profile URL>“,
“person_title”: “Senior Product Engineer”,
“person_location”: “Bengaluru, Karnataka, India”,
“changes”: {
“position_changes”: {
“new_positions”: [{
“details”: {
“employer_name”: “Frontier AI”,
“employee_title”: “Senior Product Engineer”,
“start_date”: “2026-03-01T00:00:00+00:00”,
“employee_location”: “Bengaluru, Karnataka, India”,
“employer_company_website_domain”: [“feverup.com”]
},
“position_id”: 2606661155
}],
“changed_positions”: [{
“changes”: { “end_date”: { “current”: “2026-03-01T00:00:00+00:00”, “previous”: null } },
“position_id”: 2606651150
}]
},
“field_changes”: { “skills”: { “current”: [], “previous”: [“Software Design”] } }
},
“current_employers”: [{ “employer_name”: “…” }]
}
Built for how you work
Use Watcher with code, or with no code at all. The same real-time signals underneath.
For developers
Handle each delivered role change, map the documented fields, and update your CRM or workflow without exposing credentials in the payload.
No code
Ask for company and professional profile changes in natural language through MCP inside Claude, then route the same signals to Slack or email delivery.
| Feature | Crustdata | Coresignal | PDL | Zoominfo |
|---|---|---|---|---|
| Webhook support | ✅ Yes (for job changes & custom events) | ✅ Yes (only for job changes) | ❌ No | ✅ Yes (enterprise only) |
| Realtime updates | ✅ Yes | Weekly | N/A | Unspecified |
