MCP servers · HubSpot · MCP server
Connect Codex CLI to HubSpot
One line gives Codex CLI your HubSpot account as tools: 6 endpoints, contacts, companies, deals, called with your own connection. No key in the prompt, a receipt for every call, revoke Codex CLI's access alone any time.
Three steps
- Create a free 0n3 account and connect HubSpot. Paste a key or sign in; it lands in your vault, encrypted.
- Install 0n3 into Codex CLI. OpenAI's terminal agent reads 0n3 over Streamable HTTP with a token from your environment.
- Ask Codex CLI: whoami. Then: "Create a contact in HubSpot".
Put the token in your environment
export ON3_TOKEN="<your 0n token>"
Add it to your shell profile so Codex finds it next time.
The line above carries a placeholder; 0n3.app/install mints a real key named for Codex CLI and fills it in.
What Codex CLI can then do in 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/dealsHubSpot in other AI clients
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