lemlist is a cold email outreach and sales engagement platform that helps sales teams build prospect lists, personalize multichannel campaigns across email and LinkedIn, and automate follow-ups to book more meetings. It includes a built-in B2B lead database, AI-generated personalization, and warm-up tools to keep deliverability healthy. The lemlist API enables developers to integrate lemlist with other tools and automate outreach workflows using API key authentication.
APIs.json: https://raw.githubusercontent.com/api-evangelist/lemlist/refs/heads/main/apis.yml
- Type: Index
- Email Outreach
- Sales Engagement
- Cold Email
- Sales Automation
- LinkedIn Outreach
- Lead Generation
- Created: 2026-05-11
- Modified: 2026-05-11
REST API for managing campaigns, leads, sequences, teams, and outreach activities in lemlist. Authentication is via API key passed using HTTP Basic auth. The API supports integrating lemlist with CRMs and other tools and automating multichannel outreach workflows.
- Human URL: https://developer.lemlist.com
- Base URL:
https://api.lemlist.com/api
- Email Outreach
- Sales Engagement
- Cold Email
- Sales Automation
- Documentation
- Getting Started
- Postman Collection — Postman Collection 2.1
- Open Collection — Open Collection 1.0
FN: Kin Lane Email: kin@apievangelist.com