







Use Smartlead’s API to programmatically send campaigns and follow-ups.
Set conditions for replies, pauses, or lead updates without manual input.
Automate complex workflows across multiple inboxes and campaigns.
Let webhooks sync real-time updates across your CRM or reporting tools.
Trigger cold emails and follow-ups directly from your own backend.
Assign leads, switch sequences, and update campaign status.
Access inboxes, replies, and lead actions to control your workflow.
Balance volume with our email deliverability API layer.
Smartlead helped us scale to millions of emails with strong deliverability. The unlimited sending, easy inbox warm-up, and flexibility with custom tracking domains make it perfect for high-volume outbound. The UI is clean and the team ships updates fast. Workflows are intuitive, support is responsive, and Smartlead keeps improving with features that actually matter—like inbox rotation, blacklist monitoring, and advanced reply detection.

Gabriel M.
Founder, CEO - Reachflow
Get notified the moment a lead replies, bounces, or unsubscribes.
Push updates to Slack, CRMs, Google Sheets, or internal dashboards.
Connect your tools and workflows so nothing falls through the cracks.
Replace manual status checks with automated, real-time updates.
Plug straight into HubSpot, Salesforce, Pipedrive, Zoho, and more.
Use Zapier, Make, or N8N to push or pull data between Smartlead and 6,000+ apps.
Trigger workflows the instant a prospect replies, bounces, or books a call.
Keep every team and client dashboard aligned with one always-up-to-date data stream.
Frequently Asked Questions
What is Smartlead’s API used for in cold email automation?
Smartlead’s API lets you control campaign sends, manage inboxes, update lead statuses, and automate follow-ups—all from your internal systems.
How do webhooks work in Smartlead?
Smartlead webhooks notify you in real time when key events happen—like a lead replying, bouncing, or unsubscribing—so you can trigger custom actions instantly.
Can agencies use Smartlead API to manage multiple client accounts?
Yes. Agencies can use the API to manage campaigns, leads, and inboxes across unlimited accounts from one centralized system.
What kind of workflows can be automated using Smartlead API and webhooks?
You can automate cold email sends, lead routing, follow-up triggers, CRM syncing, reporting, and status updates—ideal for large-scale outreach.
Is there documentation available for Smartlead’s API and webhooks?
Yes. You can access full Smartlead API documentation and webhook setup guides from the API Docs page.