This guide walks you through connecting the SleekTech Connector to ChatGPT using a custom MCP plugin.

Requirements: 

A ChatGPT plan that supports Developer mode (Plus, Pro, Business, Enterprise, or Education), and your SleekTech API key.


Step 1: Enable Developer Mode

  1. Open Settings in ChatGPT.
  2. Click the Plugins tab.
  3. Click Developer mode at the bottom of the list.
  4. Toggle Developer mode on. You'll see it flagged as "Elevated risk" — this is expected, since it allows unverified custom connectors.



Step 2: Create the Custom Plugin

  1. Go back to the Plugins tab.
  2. Click Browse plugins, then find the option to create a new custom plugin (e.g. a "+" or "Create your own" option).
  3. Fill in the New Pluginform:
    • Description: e.g. "Access data on property management software"
    • Connection type: Server URL
    • Server URL: https://connect.sleek-tech.co.uk/mcp
    • Authentication: OAuth
  4. Check "I understand and want to continue" to acknowledge the custom MCP server risk notice.
  5. Click Create.



Step 3: Authorize the Connection

  1. On the plugin's detail page, you'll see a status of Disconnected.
  2. Click Connect.
  3. A SleekTech sign-in page will appear — paste your API key and select Authorise.
  4. The status should update to Connected.



Step 4: Start Using It

  1. Start a new chat in ChatGPT.
  2. Make sure the SleekTech plugin is toggled on for that conversation.
  3. Ask your questions — ChatGPT will now be able to use the SleekTech Connector's tools.

Troubleshooting

  • No "Developer mode" option visible: Your ChatGPT plan may not support custom MCP connectors (Free plan does not).
  • Connector stays "Disconnected": Re-click Connect and make sure you complete the SleekTech sign-in page fully, including pasting a valid API key.
  • "Server not found" / connection errors: Double-check the URL is exactly https://connect.sleek-tech.co.uk/mcp with no trailing characters.