---
title: "Trello Connection Guide in Unified"
img: https://s3.us-east-2.amazonaws.com/unified-article-images/trello_connection_guide_in_unified-icon.png
date: 2026-04-17T19:26:00.000Z
tag: Guides
description: "To create a Trello connection in Unified, you need to,"
url: "https://docs.unified.to/guides/trello_connection_guide_in_unified"
---

# Trello Connection Guide in Unified
------
_April 17, 2026_

### Overview


To create a Trello connection in Unified, you need to:

- Create a Trello app
- Copy its API key
- Allow Unified domains as **Allowed Origins**

---


### Steps


**1. Create a Trello App**

- Go to **Trello Power-Ups Admin**
- Create a new app
- Open the app details page

**2. Get API Key**

- Navigate to the **API Key** section
- Copy your Trello API key

**3. Configure in Unified**

- Go to:[https://app.unified.to/integrations/trello](https://app.unified.to/integrations/trello)
- Paste the API key into the required field

**4. Add Allowed Origins in Trello**



![image.png](https://s3.us-east-2.amazonaws.com/unified-article-images/trello_connection_guide_in_unified-0.png)


Add the following URLs in your Trello app settings:

- [https://app.unified.to](https://app.unified.to/)
- [https://auth.unified.to](https://auth.unified.to/)
- The Unified API domain shown during setup, for example:
    - [https://api.unified.to](https://api.unified.to/)
    - [https://api-eu.unified.to](https://api-eu.unified.to/)
    - (or your region-specific API domain)

**5. Save & Complete Setup**

- Save the Trello app settings
- Return to Unified
- Complete the connection flow

---


### Notes

- Make sure the **regional API domain** matches what is shown in the Unified app during setup
- This can vary depending on your environment or region

---


### Troubleshooting


If the connection does not work:

- Confirm the API key is from the correct Trello app
- Ensure all **Allowed Origins** are added exactly (no typos or missing domains)
- Verify the correct **regional API domain** is included
- Retry the connection after saving changes