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Connect ChatGPT to Prometheux

Connect ChatGPT to Prometheux using the Remote MCP Server. ChatGPT supports remote MCP servers via its Developer Mode connectors feature.

Prerequisites​

  • ChatGPT paid plan (Plus, Pro, Team, Enterprise, or Education)
  • Developer Mode enabled in your ChatGPT account
  • Prometheux credentials (username, organization, API token)

Setup​

  1. Enable Developer Mode:

    • Open ChatGPT on the web
    • Click your profile icon → Settings
    • Go to Apps & Connectors → Advanced settings
    • Toggle Developer Mode on

  2. Create the connector:

    • Go back to Settings → Apps & Connectors
    • Click "Create" (next to "Advanced settings")
    • Fill in the connector details:
      • Name: Prometheux
      • Description: e.g., Query and reason over your Prometheux ontologies
      • MCP Server URL: https://api.prometheux.ai/px-remote-mcp-server/mcp
    • Select OAuth as the authentication method
    • Check "I trust this application"
    • Click "Create"

  3. Authenticate:

    • ChatGPT will redirect you to the Prometheux OAuth login page
    • Enter your credentials:
      • Username: Your Prometheux username
      • Organization: Your Prometheux organization
      • API Token: Your Prometheux authentication token
    • Click "Authorize Access"

  4. Start using: Open a new chat, and the Prometheux tools will be available. You can mention @Prometheux in your prompt or ChatGPT will automatically use the tools when relevant.

Usage​

Once connected, interact naturally with ChatGPT. The model will automatically invoke Prometheux tools when your queries relate to knowledge graphs, ontologies, or concept execution.

Example Conversations & Available Tools

See the MCP overview page for example conversations and a complete list of available tools.

Using with Deep Research​

If you have ChatGPT Pro or Enterprise, you can also use Prometheux as a source for Deep Research:

  1. In a new chat, click "Tools" under the input field
  2. Select "Run Deep Research"
  3. Click "Add Sources" → "Connect More"
  4. Select your Prometheux connector
  5. Ask a research question — ChatGPT will query your Prometheux ontologies alongside web results

Disconnecting​

To remove the connector:

  1. Go to Settings → Apps & Connectors
  2. Find the Prometheux connector
  3. Click the connector, then "Delete"

Troubleshooting​

"Create" button not visible​

Solution:

  • Ensure Developer Mode is toggled on under Advanced settings
  • Verify you're on a paid plan (Plus, Pro, Team, Enterprise, or Education)
  • For Team/Enterprise workspaces, ask your admin to enable custom connectors

OAuth login page doesn't load​

Solution:

  • Check that popup blockers are not preventing the OAuth window
  • Try in an incognito/private window
  • Verify the MCP Server URL is correct: https://api.prometheux.ai/px-remote-mcp-server/mcp

"Failed to connect" or timeout errors​

Solution:

  • The MCP server URL must use /mcp at the end (not just the base URL)
  • Ensure your Prometheux credentials are valid and the API token hasn't expired
  • Try disconnecting and recreating the connector

Tools not appearing in conversations​

Solution:

  • After creating the connector, open a new chat (existing chats won't pick it up)
  • Check that the connector shows as connected in Settings → Apps & Connectors
  • Try being explicit: "Use Prometheux tools to list my projects"

For general troubleshooting, see the Remote MCP Server troubleshooting section.