lemlist REST API

REST discovered

Details

URL: https://api.lemlist.com/api
Docs: https://developer.lemlist.com/api-reference/getting-started/overview

Authentication

lemlist API key api_key discovered Get key ↗

Authorization: Basic <credential>

Sign in at lemlist app, open Settings → Integrations (the MCP help article shows Settings → Team → Integrations), click Generate a new API key / Generate, and store the key securely because it may not be shown again. The API docs note this key is used as the BASIC-auth password for the REST API, and the MCP docs show it can also be sent in the X-API-Key header for MCP.