Trello API: Setting Up OAuth 2.0 Authentication

Trello now requires OAuth 2.0 for authentication. This method ensures secure access to Trello's API while improving security and user control.

Step 1: Create a Trello Account

If you don’t have a Trello account, create one at Trello’s website.

Step 2: Access the Power-Up Admin Portal

To generate an API key, you must create a Power-Up. Visit the Power-Up Admin Portal and click on New to create a Power-Up.

Step 3: Generate an API Key

Once inside your Power-Up page, click on Generate a new API key.

Step 4: Retrieve Your API Key & Set Up Security

Your API key will be displayed. Copy and store it securely. You can also configure the following settings:

• Allowed Origins: Define trusted domains that can use your API key.
• API Secret: Add an extra security layer to your API key.

Step 5: Obtain an OAuth 2.0 Access Token

Use OAuth 2.0 to get an access token:

POST https://trello.com/1/OAuthGetAccessToken
Content-Type: application/x-www-form-urlencoded

client_id=YOUR_CLIENT_ID
&client_secret=YOUR_CLIENT_SECRET
&code=AUTHORIZATION_CODE
&redirect_uri=YOUR_REDIRECT_URI

Step 6: Use the Access Token in API Requests

Attach the token when making API requests:

GET https://api.trello.com/1/members/me?token=YOUR_ACCESS_TOKEN

Common Errors & Solutions