Know who's active on LinkedIn in your market.

The real time LinkedIn activity & scoring API built for revenue teams.

Zero account connection required.
How it works

Go from stale data to scored leads in seconds.

01
Submit your target lead list
Send an array of target LinkedIn profile URLs via our REST API, or map a live view directly from Clay, Smartlead, or your CRM.
02
Activity recalculation & intent scoring
Warmbound analyzes today's data against historical baselines, isolating online behavior to calculate a digital reachability grade of your prospects.
03
Instant webhook notification
When a target prospect shows high reachability, our engine dispatches a time JSON payload containing the profile details.
04
Smarter campaigns
Reach people while they're active and engaged. Warmbound pushes scored leads straight into your stack the moment intent spikes, so your team engages prospects when they're most likely to respond.
Features

Speed to lead.

24-hour recency engine
Sales Navigator only shows activity from the last 30 days. Warmbound isolates profile actions in the past 24 hours so you reach prospects while they're hot.
Multi-signal intent scoring
We look far beyond top-level posts. Our engine blends multiple live behavioural signals from a prospect's profile into a single, decision-ready 0–100 intent score.
Zero-risk architecture
No browser extension, cookie sharing, or LinkedIn account login required. Your reps' personal LinkedIn accounts remain completely safe from restrictions or bans.
Developer-first webhooks
Receive real-time JSON payloads directly into your backend endpoints, Svix queues, or Zapier webhooks. Standardized schemas designed for instant parsing.
Smart delta caching
Save bandwidth and money. Our database caches baseline state so you only pay for actionable delta checks rather than redundant full-page payloads.
Built for orchestration
Made for agentic workflows. Point Claude, Cursor, or Codex at our endpoint and let your agents pull live engagement data and act on it autonomously in seconds.
Benefits

Better timing, better numbers.

Increase reply rates
Outbound lands when prospects are actually paying attention. Sending into live activity windows lifts replies without touching your copy, domains, or sending volume.
Increase conversion rates
Feed reachability grades into your ad campaigns and matched audiences so spend concentrates on people who are engaged right now instead of stale lists.
Smarter targeting
Grade every account and contact before you spend a credit. Your team works A-grade prospects first and quietly drops the profiles that have gone dark.
Faster speed to lead
Signals arrive continuously, so the gap between intent and first touch shrinks from days to minutes across email, phone, and social.
Lower cost per meeting
Fewer wasted sends, fewer wasted dials, fewer wasted impressions. The same headcount and budget produce more booked meetings per week.
Happier reps
Reps stop grinding through unresponsive lists. A prioritized daily queue of reachable prospects keeps morale and activity quality high.
Integrations

Connects to your stack.

Claude
Cursor
Codex
Clay
HubSpot
Salesforce
Slack
Smartlead
FAQ

The questions we hear most.

Will this get my LinkedIn account restricted or banned?
No. You never log into LinkedIn through our platform, and we never ask for session cookies or credentials.
How is this different from LinkedIn Sales Navigator's "Posted in 30 Days" filter?
Sales Navigator treats someone who posted 30 days ago the exact same as someone who posted 15 minutes ago. Warmbound calculates recency down to the hour and includes non-post engagement that Sales Navigator completely misses.
How long does it take to process a list of 10,000 prospects?
Polling runs either asynchronously overnight in background queues, or on-demand depending on your settings. Your pre-computed intent scores and webhook events are delivered in accordance with your settings.
What happens if a prospect has zero activity?
Profiles with no recent activity return a F grade.

See Warmbound in action.