MCP servers · Mailchimp · MCP server + skill
Connect Claude Code to Mailchimp
One line gives Claude Code 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 Code's access alone any time.
Three steps
- Create a free 0n3 account and connect Mailchimp. Paste a key or sign in; it lands in your vault, encrypted.
- Install 0n3 into Claude Code. The terminal agent. One command, then every connection you hold is a tool in your shell. The skill file teaches it how 0n3 works.
- Ask Claude Code: whoami. Then: "List audiences in Mailchimp".
Install (user scope — every project)
claude mcp add --transport http --scope user 0n3 https://0n3.app/mcp --header "Authorization: Bearer <your 0n token>"
The line above carries a placeholder; 0n3.app/install mints a real key named for Claude Code and fills it in.
What Claude Code can then do in Mailchimp
Audiences · View and manage audiences/lists2
List audiences
GET /listsGet an audience
GET /lists/{listId}Members · Add and manage subscribers4
Add a member
POST /lists/{listId}/membersUpdate a member
PATCH /lists/{listId}/members/{subscriberHash}List members
GET /lists/{listId}/membersSearch members
GET /search-membersCampaigns · Create and send email campaigns4
List campaigns
GET /campaignsCreate a campaign
POST /campaignsSend a campaign
POST /campaigns/{campaignId}/actions/sendGet a campaign report
GET /reports/{campaignId}Templates · View email templates1
List templates
GET /templatesMore · Everything else this app exposes.1
List automations
GET /automationsMailchimp in other AI clients
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