MCP servers · Lemlist · connector
Connect Claude (desktop & claude.ai) to Lemlist
One line gives Claude (desktop & claude.ai) your Lemlist account as tools: 7 endpoints, campaigns, activities, leads, called with your own connection. No key in the prompt, a receipt for every call, revoke Claude (desktop & claude.ai)'s access alone any time.
Three steps
- Create a free 0n3 account and connect Lemlist. Paste a key or sign in; it lands in your vault, encrypted.
- Install 0n3 into Claude (desktop & claude.ai). Add 0n3 as a custom connector; sign in once through the 0n door.
- Ask Claude (desktop & claude.ai): whoami. Then: "List campaigns in Lemlist".
Claude desktop app and claude.ai
- Settings → Connectors → Add custom connector
- Name: 0n3 · URL: https://0n3.app/mcp
- Click Connect and sign in with your 0n account (email + password, or paste your 0n token)
- Turn the connector on in a chat and ask: "whoami"
This is the OAuth door: no token to paste, revoke it any time from 0n3 → Tokens.
The line above carries a placeholder; 0n3.app/install mints a real key named for Claude (desktop & claude.ai) and fills it in.
What Claude (desktop & claude.ai) can then do in Lemlist
Campaigns · Manage outreach campaigns5
List campaigns
GET /campaignsGet a campaign
GET /campaigns/{campaignId}Add a lead
POST /campaigns/{campaignId}/leads/{email}List leads
GET /campaigns/{campaignId}/leadsDelete a lead
DELETE /campaigns/{campaignId}/leads/{email}Activities · Track email activities1
List activities
GET /activitiesLeads · Manage campaign leads0
Manage campaign leads
More · Everything else this app exposes.1
Get a team
GET /teamLemlist in other AI clients
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