MCP servers · crm
HubSpot MCP server
CRM and marketing — contacts, companies, deals, emails. Hosted by 0n3: 6 endpoints your AI can call with your own HubSpot account, from Claude, ChatGPT, Cursor, Claude Code, Codex or Gemini CLI. One sign-in, one key per AI, a receipt for every call.
6 endpoints3 categoriesauth: access_tokenhosted
What your AI can do with HubSpot
Contacts · Manage contacts3
Create a contact
POST /crm/v3/objects/contactsList contacts
GET /crm/v3/objects/contactsSearch contacts
POST /crm/v3/objects/contacts/searchCompanies · Manage companies1
Create a company
POST /crm/v3/objects/companiesDeals · Manage deals2
Create a deal
POST /crm/v3/objects/dealsList deals
GET /crm/v3/objects/dealsInstall in three steps
- Create a free account at 0n3.app and connect HubSpot: 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 create a contact in HubSpot.
Install (user scope — every project)
claude mcp add --transport http --scope user 0n3 https://0n3.app/mcp --header "Authorization: Bearer <your 0n token>"
Connect HubSpot to
Claude Code + HubSpotMCP server + skillClaude (desktop & claude.ai) + HubSpotconnectorChatGPT + HubSpotconnector · GPT actionCodex CLI + HubSpotMCP serverGemini CLI + HubSpotMCP serverCursor + HubSpotMCP serverVS Code (Copilot) + HubSpotMCP serverWindsurf + HubSpotMCP server
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Questions
What can an AI do with the HubSpot MCP server?
6 things: contacts, companies, deals. Every call runs with your own HubSpot connection and lands on a receipt.
Do I need to run anything on my computer?
No. 0n3 is hosted. Connect HubSpot once, install 0n3 into your AI with one line, done.
Where does my HubSpot key go?
Into your 0n3 vault, encrypted, one record per connection. The AI never sees it.