0n3
MCP servers · Mailchimp · connector

Connect Claude (desktop & claude.ai) to Mailchimp

One line gives Claude (desktop & claude.ai) your Mailchimp account as tools: 12 endpoints, audiences, members, campaigns, 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.

Get the line for Claude (desktop & claude.ai)Connect Mailchimp first

Three steps

  1. Create a free 0n3 account and connect Mailchimp. Paste a key or sign in; it lands in your vault, encrypted.
  2. Install 0n3 into Claude (desktop & claude.ai). Add 0n3 as a custom connector; sign in once through the 0n door.
  3. Ask Claude (desktop & claude.ai): whoami. Then: "List audiences in Mailchimp".
Claude desktop app and claude.ai
  1. Settings → Connectors → Add custom connector
  2. Name: 0n3 · URL: https://0n3.app/mcp
  3. Click Connect and sign in with your 0n account (email + password, or paste your 0n token)
  4. 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 Mailchimp

Audiences · View and manage audiences/lists2
List audiencesGET /lists
Get an audienceGET /lists/{listId}
Members · Add and manage subscribers4
Add a memberPOST /lists/{listId}/members
Update a memberPATCH /lists/{listId}/members/{subscriberHash}
List membersGET /lists/{listId}/members
Search membersGET /search-members
Campaigns · Create and send email campaigns4
List campaignsGET /campaigns
Create a campaignPOST /campaigns
Send a campaignPOST /campaigns/{campaignId}/actions/send
Get a campaign reportGET /reports/{campaignId}
Templates · View email templates1
List templatesGET /templates
More · Everything else this app exposes.1
List automationsGET /automations

Mailchimp in other AI clients

Claude Code + MailchimpMCP server + skillChatGPT + Mailchimpconnector · GPT actionCodex CLI + MailchimpMCP serverGemini CLI + MailchimpMCP serverCursor + MailchimpMCP serverVS Code (Copilot) + MailchimpMCP serverWindsurf + MailchimpMCP server

Claude (desktop & claude.ai) with other apps

Hostinger363 endpointsTelegram132 endpointsPipedrive95 endpointsResend67 endpointsSquare57 endpointsLinkedIn50 endpointsSlack45 endpointsFigma32 endpointsCloudConvert32 endpointseBay25 endpointsQuickBooks21 endpointsCloudflare21 endpoints