Lemwarm

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Warms up new email accounts and monitors sender reputation to improve inbox placement for outreach.
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Lemwarm API

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API key. API key; API access on: Every paid planSource

MCP server

Address
https://app.lemlist.com/mcpSource
What it is
Official lemlist MCP server (Lemwarm is a lemlist product); OAuth or X-API-Key header.

Checked on 2026-10-10 in the developer documentation.

How to automate Lemwarm

Built-in automation

Warm-up runs on its own once a mailbox is connected. Lemwarm builds up sending volume gradually, caps daily sends per inbox and pauses before unsafe limits. You set sending windows by time zone. An idea: set windows to match your prospects' working hours, and let the alerts tell you when a mailbox needs attention.

API and webhooks

Lemwarm has no separate API. The lemlist API at developer.lemlist.com and its webhooks are the route, and they cover leads, campaigns and team data. An idea: send reply events from a webhook to your CRM so a human follows up quickly.

MCP server

lemlist has an official MCP server with OAuth that works with Claude and other MCP clients. It is documented for campaigns, leads and performance, so check whether it exposes mailbox health before you rely on it for deliverability checks.