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ChatGPT

About 2 minutes

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  1. Open chatgpt.com/plugins in a browser and click +.

  2. Choose Add custom MCP server (some accounts show Create custom MCP server), name it Glesso and paste this as the Server URL.

    https://mcp.glesso.com/mcp

  3. Set Authentication to OAuth, tick “I understand and want to continue” and click Create as a plugin.

  4. Install the plugin. Glesso opens: check the app and the account, then click Allow.

  5. Start a new chat, type @, pick Glesso and ask it something that needs a service you connected, for example “What's on my calendar today?”.

Good to know

  • Custom MCP servers need a paid ChatGPT plan and the web app. Workspace admins can turn them off.
  • ChatGPT asks you to confirm before a tool changes anything.
  • ChatGPT signs in. It doesn't take API keys.

If it doesn't work

  • Check the Server URL is exactly https://mcp.glesso.com/mcp, including /mcp.
  • Tools missing after you connected another service? Open the plugin's details and click Refresh.

New to Glesso?

Create an account and connect a service first. Onboarding then shows this guide beside a live check that turns green at your app's first tool call.