MCP servers · email marketing
ConvertKit MCP server
Creator email marketing — subscribers, sequences, broadcasts, forms, tags. Hosted by 0n3: 11 endpoints your AI can call with your own ConvertKit account, from Claude, ChatGPT, Cursor, Claude Code, Codex or Gemini CLI. One sign-in, one key per AI, a receipt for every call.
11 endpoints5 categoriesauth: api_keyhosted
What your AI can do with ConvertKit
Subscribers · Manage subscribers4
List subscribers
GET /subscribersGet a subscriber
GET /subscribers/{subscriber_id}Create a subscriber
POST /forms/{form_id}/subscribeTag subscriber
POST /tags/{tag_id}/subscribeSequences · Manage email sequences2
List sequences
GET /sequencesAdd a to sequence
POST /sequences/{sequence_id}/subscribeBroadcasts · Send broadcasts2
List broadcasts
GET /broadcastsCreate a broadcast
POST /broadcastsTags · Manage subscriber tags2
List tags
GET /tagsCreate a tag
POST /tagsForms · Manage signup forms1
List forms
GET /formsInstall in three steps
- Create a free account at 0n3.app and connect ConvertKit: paste a key or sign in through a door. It lands in your vault, encrypted.
- Open 0n3.app/install, pick your AI. A key is made for that AI alone; copy the line it gives you.
- Ask your AI: whoami. It answers with your connected services. Then ask it to list subscribers in ConvertKit.
Install (user scope — every project)
claude mcp add --transport http --scope user 0n3 https://0n3.app/mcp --header "Authorization: Bearer <your 0n token>"
Connect ConvertKit to
Claude Code + ConvertKitMCP server + skillClaude (desktop & claude.ai) + ConvertKitconnectorChatGPT + ConvertKitconnector · GPT actionCodex CLI + ConvertKitMCP serverGemini CLI + ConvertKitMCP serverCursor + ConvertKitMCP serverVS Code (Copilot) + ConvertKitMCP serverWindsurf + ConvertKitMCP server
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Questions
What can an AI do with the ConvertKit MCP server?
11 things: subscribers, sequences, broadcasts, tags and more. Every call runs with your own ConvertKit connection and lands on a receipt.
Do I need to run anything on my computer?
No. 0n3 is hosted. Connect ConvertKit once, install 0n3 into your AI with one line, done.
Where does my ConvertKit key go?
Into your 0n3 vault, encrypted, one record per connection. The AI never sees it.