MCP servers · ActiveCampaign · connector
Connect Claude (desktop & claude.ai) to ActiveCampaign
One line gives Claude (desktop & claude.ai) your ActiveCampaign account as tools: 10 endpoints, contacts, tags, automations, 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.
Three steps
- Create a free 0n3 account and connect ActiveCampaign. Paste a key or sign in; it lands in your vault, encrypted.
- Install 0n3 into Claude (desktop & claude.ai). Add 0n3 as a custom connector; sign in once through the 0n door.
- Ask Claude (desktop & claude.ai): whoami. Then: "Create a contact in ActiveCampaign".
Claude desktop app and claude.ai
- Settings → Connectors → Add custom connector
- Name: 0n3 · URL: https://0n3.app/mcp
- Click Connect and sign in with your 0n account (email + password, or paste your 0n token)
- 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 ActiveCampaign
Contacts · Manage contacts4
Create a contact
POST /contactsList contacts
GET /contactsGet a contact
GET /contacts/{id}Update a contact
PUT /contacts/{id}Tags · Tag contacts2
Add a tag
POST /contactTagsList tags
GET /tagsAutomations · List automations1
List automations
GET /automationsDeals · Manage CRM deals2
Create a deal
POST /dealsList deals
GET /dealsMore · Everything else this app exposes.1
List lists
GET /listsActiveCampaign in other AI clients
Claude Code + ActiveCampaignMCP server + skillChatGPT + ActiveCampaignconnector · GPT actionCodex CLI + ActiveCampaignMCP serverGemini CLI + ActiveCampaignMCP serverCursor + ActiveCampaignMCP serverVS Code (Copilot) + ActiveCampaignMCP serverWindsurf + ActiveCampaignMCP server