The LinkedIn automation API for outreach.
The Smart API runs invitations, messages, InMail, and voice notes as campaign steps, not raw calls. The sequencer, 250+ monitored safeguards, unified inbox, and a 1B+ contact database sit behind one REST API and webhooks.
250+
Safeguards, monitored 24/7
Dedicated proxy per sender, managed warmup, health checks, adaptive caps.
1 POST
Sets up the whole sequence
Create a campaign with one call, add leads, activate. The sequencer is built in.
1B+
Contacts, 60M companies
Native prospect database, refreshed weekly, plus Sales Navigator imports.
$16.90
Per sender, first tier
Tiered pricing: the per-sender price drops as your fleet grows, down to $6.90.
Campaigns, senders, and replies as API resources
Everything lives under app.swarmhit.com/api/v1: connect a sender with one call (or a hosted connect link so you never touch credentials), create a campaign with its sequence and schedule, add leads, activate. Checkpoints, account health, and every reply come back over webhooks. The raw OpenAPI spec is public for Postman or codegen.
Full schemas and a live playground at developer.swarmhit.com.
The LinkedIn channel, in four calls
api/v1POST /accounts/hosted-link · connect a sender, no passwords
POST /campaigns · sequence, schedule, sender pool
POST /campaigns/{id}/leads · add the audience
GET /campaigns/{id} · live performance
Every LinkedIn action, sequenced
Each one is a step the sequencer schedules, retries, and rotates across senders, or a direct action your product calls on demand. See every endpoint.
Connection requests
with personalized notes
Messages & follow-ups
personalized with variables
InMail
reach beyond your network
Voice notes
cloned from a short sample
Post comments
AI-drafted, approve before send
Profile visits
warm accounts before the invite
Likes & follows
light touches between steps
Withdraw stale invites
keep the invite ratio healthy
Messages, InMail and voice notes with the sequencer built in
Transport-level messaging APIs hand you one message at a time and leave campaigns to you. On Swarmhit, messages, InMail, and voice notes are steps in sequences with branching on accepted or replied, sending windows, retries, and automatic multi-sender rotation. Replies land in the unified Unibox with AI-detected interest, readable and answerable through the same API your product already uses. Endpoint details: LinkedIn DM API and LinkedIn inbox API; the options on the market are compared in our LinkedIn messaging API guide.
Import from LinkedIn Sales Navigator, or skip it
LinkedIn offers no public way to pull Sales Navigator searches into an outreach tool (our Sales Navigator API guide covers what exists), so Swarmhit covers the audience problem from both ends: import a Sales Navigator search straight into a campaign, upload a CSV, or search a database of 1B+ contact profiles across 60M companies, refreshed weekly and sourced through third-party data providers, and unlock leads with credits only when you need them. See the Sales Navigator import endpoint.
Safety operated for you, visible in the API
Every sender gets a dedicated residential proxy, managed warmup, randomized timing, business-hour windows, and per-account caps, behind 250+ safeguards tuned to LinkedIn’s behavior and monitored 24/7. Health, daily limits, cooldowns, and pause state are exposed on the account resource, so restriction risk is engineering we operate, not judgment your roadmap absorbs. No tool can make LinkedIn automation zero-risk; the difference is who carries the operational load.
Senders connected without handling credentials
Send users to a hosted connect link, use Infinite Login with a 2FA setup key for hands-free reconnection, or start from an existing browser session. Credentials are stored encrypted and never returned by the API.
One infrastructure. Every outreach channel.
FAQ
The LinkedIn API, answered.
- Sequencer built in
- 250+ safeguards monitored 24/7
- REST API and webhooks
The LinkedIn channel is live.
Plug your product into it.
Get an API key, connect a sender through a hosted link, and set up your first campaign in one POST.