You are now able to embed your Proto.io prototypes in your Trello cards. You just need to add the Proto.io Power-Up for Trello.
In the Trello card, click on the Proto.io Power-Up button on the right and then attach your prototype, by entering your prototype's Share link and clicking Attach, as shown below. You will immediately see your prototype embedded in the card.
Your team can interact with the embedded Proto.io prototypes right in the Trello card.
Updating your Proto.io Share link will keep your Trello cards up to date with the latest iterations and changes to design and functionality with no additional effort in updating your Trello description.