SIGNAL API

Get Realtime Alerts on Leads, Accounts & Companies

Q: What is the Signal API?

The Signal API allows you to subscribe to real-time updates about people or companies. Set up watchers and receive instant webhook notifications for job changes, funding rounds, or hiring surges.

Q: What types of updates can I track?

Track 8+ update types: job changes, promotions, departures, funding announcements, headcount changes, post keywords, international hires, and custom event combinations.

Q: What are the 3 watcher types?

Event Watcher tracks events across all companies/people. Company Watcher monitors specific companies. People Watcher follows specific individuals for job changes and promotions.

Q: How are alerts delivered?

Via email digests and webhooks - real-time JSON payloads to your endpoint. Route to Slack, Teams, CRM, or custom apps. Automatic retries ensure delivery, and payloads can be signed with an HMAC secret (X-Datamagnet-Signature header).

Q: How often are watches updated?

Continuously in real-time. Most job changes are detected within 1-24 hours, often before public profile updates.

Q: How does Datamagnet compare to others?

Real-time vs weekly batches, webhooks for all events (not just job changes), custom filtering and signal stacking, sub-200ms API response times.

Q: How do I get started?

Book a demo with our team. We'll set up your first watchers based on your use case. Most customers are live within days.

Subscribe to live updates about people or companies. Set watches, get notified via webhooks, and always act on fresh data.

Get a Demo View Documentation

POST/api/v1/signal/create

{
  "signal_type": "keyword_engagement",
  "status": "active",
  "signal_id": "sig_8f3a…",
  "webhook_url": "https://yourapp.com/webhooks/signals"
}

What is the Datamagnet Signal API?

The Datamagnet Signal API watches the professional network and tells you when something changes. It tracks six signal types — job changes, new posts, and keyword, industry, company and person engagement — filtered to your ICP and delivered by email or signed webhook.

Signal types: Six
Filtering: ICP and lead scoring
Delivery: Email or signed webhook

Popular Use Cases

Built for Every Revenue Team

Sales: Capture the "Honeymoon Period"

Stop relying on "spray and pray" tactics that ignore 95% of the market not currently buying.

Follow Your Champions

Past customers are 3-5x more likely to buy again in their new organization.

Own the First 100 Days

New executives spend 70% of discretionary budget in their first 100 days.

High-Velocity Pipeline

Reduce sales cycles by 23% and increase deal sizes by 54%.

Signal Stacking

Combine job changes with funding rounds to identify "A-Leads".

3-5x

More likely to buy

70%

Budget in 100 days

54%

Larger deal sizes

Recent Job Changes

Live

Jordan Lee

VP Engineering

Bayforce

1h ago

Riley Jones

CPO

Best Doctor

6h ago

Peyton Smith

VP Operations

Octavius

1d ago

Quinn David

Co-Founder

Emtelle

2d ago

Customer Success: Churn Prevention

A key stakeholder leaving is the #1 leading indicator of churn.

Mitigate Renewal Risk

Get instant alerts when a primary contact leaves. Use 90-day window to re-onboard.

Champion Continuity

When power users get promoted, multi-thread the account.

Automated CRM Hygiene

Eliminate 20% quarterly data decay.

Day window

20%

Data decay

Churn indicator

Champion Monitoring

Juliette Fiore

Your Champion @ Acme Inc

Watching

Gets a promotion

Leaves a company

Recruiting: Proactive Talent Acquisition

Move from reactive hiring to Talent Market Intelligence.

Passive Talent Alerts

Reach elite talent before public profiles update.

Monitor Competitor Attrition

Identify when key departments are downsizing.

Identify Growth Hubs

Track hiring surges (543% spike in AI roles).

First

To reach out

543%

AI spike

24h

Before public

Talent Radar

Senior ML EngineerPassive

Google → Stealth AI Startup

VP EngineeringActive

Meta → Open to opportunities

Staff DesignerWarm

Figma → Exploring

RevOps: Real-Time GTM Infrastructure

Replace monthly batch "database dumps" with a live indexer.

Event-Driven Webhooks

Push real-time JSON payloads to Slack, Teams, or CRM.

Waterfall Enrichment

95% match rates via multi-step path.

Agentic Sales Support

Feed live signals into AI SDR agents.

95%

Match rate

<200ms

Response

Real-time

Webhooks

Waterfall Enrichment

Input[email protected]

DatabasePartial match

DomainCompany verified

Fuzzy MatchProfile matched

OutputFull Profile (95%)

Types of Watchers

Track specific events across companies and people

Job posting with keyword

Tracks postings containing keywords in specific locations.

Funding announcement

Tracks new funding rounds including seed through growth.

Headcount increased

Tracks when headcount grows by specified percentage.

Post keywords

Tracks executive posts containing your keywords.

Developer-First

Six signal types, one simple API

Create, list, update and delete signals programmatically. Engagement signals filter every lead against your ICP and score it 1–3.

job_change

Job or company changes on tracked profiles

new_post

New posts from tracked profiles

keyword_engagement

People engaging with posts matching your keywords

industry_engagement

People engaging with posts from target industries

company_engagement

People engaging with posts from specific companies

person_engagement

People engaging with posts from or about specific people

Delivery via email digests or webhooks — JSON payloads, automatic retries, and optional HMAC signing with the X-Datamagnet-Signature header.

POST /api/v1/signal/create

curl -X POST \
  "https://api.datamagnet.co/api/v1/signal/create" \
  -H "Authorization: Bearer {token}" \
  -H "Content-Type: application/json" \
  -d '{
    "signal_type": "keyword_engagement",
    "keywords": ["sales intelligence", "CRM automation"],
    "icp": {
      "job_titles": ["VP Sales", "Head of Revenue"],
      "seniority_levels": ["vp", "c_level"]
    },
    "webhook_url": "https://yourapp.com/webhooks/signals"
  }'

→ 200 OK · signal active

{  "message": {    "signal_type": "keyword_engagement",    "status": "active",    "signal_id": "sig_8f3a…",    "webhook_url": "https://yourapp.com/webhooks/signals"  }}

What Our Customers Say

Trusted by Revenue Teams

"We reduced our sales cycle by 31% by reaching out to champions within 48 hours of their job change."

Marcus Chen

VP Sales at Velocity.io

"Our CS team saved 3 at-risk renewals last quarter by getting alerts when stakeholders left."

Sarah Kim

Director CS at ScaleUp

"Datamagnet's passive talent alerts let us reach candidates 2-3 weeks before other recruiters."

David Okonkwo

Head Talent at TalentForge

How does Datamagnet compare?

Feature	Datamagnet	Coresignal	PDL	Zoominfo
Webhook support	All	Jobs only		Enterprise
Realtime	Yes	Weekly	N/A	Varies
Custom filters	Yes	Limited		Enterprise
Response	<200ms	~500ms	~300ms	Variable

Frequently asked questions

The Signal API allows you to subscribe to real-time updates about people or companies. Set up watchers and receive instant webhook notifications for job changes, funding rounds, or hiring surges.

Track 8+ update types: job changes, promotions, departures, funding announcements, headcount changes, post keywords, international hires, and custom event combinations.

Event Watcher tracks events across all companies/people. Company Watcher monitors specific companies. People Watcher follows specific individuals for job changes and promotions.

Via email digests and webhooks - real-time JSON payloads to your endpoint. Route to Slack, Teams, CRM, or custom apps. Automatic retries ensure delivery, and payloads can be signed with an HMAC secret (X-Datamagnet-Signature header).

Continuously in real-time. Most job changes are detected within 1-24 hours, often before public profile updates.

Real-time vs weekly batches, webhooks for all events (not just job changes), custom filtering and signal stacking, sub-200ms API response times.

Book a demo with our team. We'll set up your first watchers based on your use case. Most customers are live within days.

See our Signal API in action

Book a personalized demo. We'll set up watchers for your use case.

Track Job Changes
Monitor Funding Events
Headcount Growth Alerts

Book a Demo View Documentation

Interactive Demo

~15 minutes

Define Signals

2 min

Set Webhook URL

1 min

Receive Live Alerts

Real-time