When bots for Hangouts Chat send replies or asynchronous messages into a room, or into a direct message (DM) conversation, they can use simple text or formatted text.

In addition to simple text replies, bots can also display more complex UIs in the form of cards.

In this example, a project management bot replies to a query by building a list of data, wrapping it with header information into a card data structure, and returning it to the chat. Hangouts Chat then parses the data and displays the card.

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Hangouts Chat API
Hangouts Chat API
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