Incoming webhooks let you send asynchronous messages into Google Chat fromapplications that aren't bots themselves. For example, you can configure amonitoring application to notify oncall personnel on Google Chat when aserver goes down. Incoming webhooks serve as a quick and easy way to integratewith existing workflows such as these without the overhead of writing entirebot applications.
Applications using incoming webhooks have several restrictions:
- They cannot be published, so they can't be installed in other chat rooms.
- They are not conversational since the webhook mechanism only works forinbound messages.
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Setting up an incoming webhook
To set up and use a webhook is straightforward:
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- Define the incoming webhook in Google Chat, provide a name and optionallyan avatar for the bot.
- Copy the system-generated URL and save it for your bot to use
- Your bot can send messages to that URL, using themessage format elements.
These steps are described in more detail below.
Define an incoming webhook
From the chat room menu:
Select Configure Webhooks
A dialog appears that lists any incoming webhooks already defined for theroom.
Click on ADD WEBHOOK.
Fill in the name field and optionally the avatar URL field.
Click SAVE.
Copy and save the webhook URL
In the Configure Webhooks screen shown above, find your webhook in the list andclick the copy icon to copy the webhook URL.
Save this URL in your bot's source code or configuration so that it can be usedas a message destination.
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Send messages to the chat room
Construct an HTTP message and send it to the saved URL as shown below:
For a more complete code example, see theIncoming Webhooks quickstart.
Limitations
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If only select organizational units (OUs) in your domain havebots enabled, incomingwebhooks created in a room will fail with the following error:
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Incoming webhooks do work in direct messages, but only when all users havebots enabled.