At this point your Trello Power-Up is running and will be ready to accept connections over the ngrok tunnel. However, Trello doesn’t know where to find it, so you need to update the iFrame Connector URL on the Trello Power-Up Admin page by following the steps below.

1. Copy ngrok URL from Command Line

First, copy the connector URL from the command line output of yarn watch:

2. Paste the ngrok URL into the Trello Power-Up Admin page

Next, paste the URL into your Power-Up’s connector URL in the Trello Power-Up Admin page.

3. Enable the Capabilities your Trello Power-Up provides

Based on the capabilities you chose earlier, you need to ensure that you have enabled these capabilities in the Capabilities tab:

Don’t forget to click ‘Save’ when you are happy with your changes.

Next Steps

Now that you have let Trello know where to find the Power-Up, you can now add it to a Trello Board.