0n3
MCP servers · Mailchimp · MCP server

Connect Windsurf to Mailchimp

One line gives Windsurf 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 Windsurf's access alone any time.

Get the line for WindsurfConnect 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 Windsurf. The mcp_config.json block.
  3. Ask Windsurf: whoami. Then: "List audiences in Mailchimp".
Write it yourself · ~/.codeium/windsurf/mcp_config.json
{
  "mcpServers": {
    "0n3": {
      "serverUrl": "https://0n3.app/mcp",
      "headers": {
        "Authorization": "Bearer <your 0n token>"
      }
    }
  }
}

The line above carries a placeholder; 0n3.app/install mints a real key named for Windsurf and fills it in.

What Windsurf 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

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