MCP servers · Lemlist · MCP server
Connect Codex CLI to Lemlist
One line gives Codex CLI 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 Codex CLI'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 Codex CLI. OpenAI's terminal agent reads 0n3 over Streamable HTTP with a token from your environment.
- Ask Codex CLI: whoami. Then: "List campaigns in Lemlist".
Put the token in your environment
export ON3_TOKEN="<your 0n token>"
Add it to your shell profile so Codex finds it next time.
The line above carries a placeholder; 0n3.app/install mints a real key named for Codex CLI and fills it in.
What Codex CLI 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
Claude Code + LemlistMCP server + skillClaude (desktop & claude.ai) + LemlistconnectorChatGPT + Lemlistconnector · GPT actionGemini CLI + LemlistMCP serverCursor + LemlistMCP serverVS Code (Copilot) + LemlistMCP serverWindsurf + LemlistMCP server