Issue connecting HubSpot MCP to OpenAI Agent Builder (401 / No tools exposed)

API
, ,
1

Hi OpenAI team,

I’m working with Agent Builder and trying to connect HubSpot via MCP.

Context:

  • HubSpot appears in the “Add MCP server” list inside Agent Builder UI.
  • I followed HubSpot official MCP documentation and CLI instructions.
  • I successfully ran hs mcp setup and configured Codex CLI.
  • HubSpot CLI MCP setup works for IDE tooling.

Problem:

  • Agent Builder cannot actually connect to HubSpot.
  • There is no clear indication whether the HubSpot tile in Agent Builder:
    1. uses a managed OpenAI connector (OAuth-based), or
    2. expects a remote MCP server URL.

Questions:

  1. Is the HubSpot tile in Agent Builder a managed connector, or a remote MCP server?
  2. If it’s managed, are there plan / region / permission requirements
    (e.g. HubSpot Super Admin)?
  3. If it’s remote MCP, is localhost MCP unsupported for Agent Builder?

Environment:

  • HubSpot CLI: 7.11.2
  • Agent Builder (web)
  • Location: Kazakhstan

Thanks!

1 Like