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Connect Ressio to ChatGPT (MCP Connection)

Step-by-step: Turn on developer mode, create a custom MCP app in ChatGPT, authorize Ressio access, and verify the connection.

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Overview

Connecting Ressio to ChatGPT lets you use ChatGPT to:
  • Read data from Ressio (like projects, start dates, IDs, schedules, budgets, estimates)
  • Optionally take actions in Ressio (write actions), depending on what permissions/actions are enabled

This setup uses an MCP server connection created through ChatGPT’s Apps settings.

Table of Contents

Before you start

  1. A ChatGPT account you can log into.
  2. A Ressio account you can log into.
  3. Access to ChatGPT Settings.
  4. Developer Mode enabled in ChatGPT (required to create the app if "Create app" isn't visible).

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Step 1: Open ChatGPT Settings

  1. In ChatGPT, go to the bottom-left corner.

  2. Click your name (or profile menu).

  3. Click Settings. 

    What you should see: A settings panel with multiple sections/options. 

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    Step 2: Go to Apps (and enable Developer Mode if needed)

    1. In Settings, click Apps.

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    If you do NOT see "Create app"

    1. Go into Advanced settings.
    2. Turn on Developer mode.
    3. Return to Settings -> Apps.

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    Why this matters:

    Ressio may appear in the App Library in the future, but in the current process you create the connection via Developer mode using a specific URL.

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    Step 3: Create a new app for Ressio

    1. In Settings -> Apps, click Create app.
    2. Set the app name (example: Ressio).
    3. Add an optional description example: 

      • "Ressio Prod - Connect to Ressio account"

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    Step 4: Enter the MCP server URL (must be exact)

    When prompted for the server URL, use the exact link shown in your process: 

    • https://www.ressio.app.mcp

    Important notes:

    • The HTTPS part is critical.

    • If you enter a variation of the URL, ChatGPT may tell you it’s incorrect and the connection will fail.

    • This URL should also be included in your Help Center article for copy/paste. 

    1. After entering the URL, click:

      • I understand and want to continue

    2. Click Create. 

    What you should see: The app will “run” briefly while it sets up the connection.

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    Step 5: Authorize ChatGPT to access Ressio

    1. You'll be prompted to sign in / authorize (example shown: Ressio Prod).

       

    2. Click Allow.

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    What to look for (verification step):

    • You should see the Ressio logo near the top of the authorization page, confirming it's the correct Ressio server.

    ✅ The authorization pager may open quickly or in a separate view. You may be asked to enter Ressio credentials, or you may not, either is normal. 

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    Step 6: Confirm the connection is successful

    After authorization, you should be returned to ChatGPT.

    Example test prompt:

    • "Show me a list of my warranty projects". 

    Why “warranty projects” is a good test: 

    It typically returns a clear, structured list. In the walkthrough, it returned 7 projects with fields like:

    • Warranty stage
    • Start date
    • Project ID
    • Project name

    If the list matches what you expect in Ressio, the connection is working.

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    Step 7: Review available actions (Read & Write)

    If you want to see what ChatGPT can do through the Ressio app:

    1. Go back to Settings -> Apps. 
    2. Find your app (example: Ressio Prod)

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    3. Click into it
    4. Look for areas like: 

      • Ask permissions

      • App actions

    What you'll see (after it refreshes): 

    • A list of read actions (pulling data from Ressio)
    • A list of write actions (taking actions in Ressio)

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    ⌛ It may take a moment to refresh before all actions appear. 

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    Troubleshooting

    "Create app" isn't showing

    • Go to Advanced settings
    • Enable Developer mode
    • Returen to Settings -> Apps

    URL isn't accepted / connection fails

    • Confirm you used the exact URL:
      • https://www.ressio.app.mcp/
    • Confirm you included https:// (NOT http://)

    Actions aren't showing yet

    • Wait a moment and reopen the app details, actions can take time to refresh. 

    🎓 To learn more about MCP, read What is an MCP Connector?

    🎓 To learn how to connect Claude to Ressio, read Connect Ressio to ChatGPT (MCP Connector).


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    Need help?

    If you get stuck or the connection doesn’t complete, contact the Ressio support team.

    * AI-generated content may contain errors. Always review outputs before using them in your project.