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Send messages to Slack

You can send messages to Slack from vals.

In this guide you’ll create an incoming webhook for your Slack workspace, and send a request to it with a message payload.

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Create a Slack app

Visit, create a new app From Scratch, and choose your App Name and your workspace.

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Go to the incoming webhooks page

On the next page (or in the side bar), click Incoming Webhooks.

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Create an incoming webhook

Click the Activate Incoming Webhooks toggle.

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Scroll down, and click Add New Webhook to Workspace.

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Select the channel which the webhook will send messages to.

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Save the webhook address as a secret

You’ll be taken back to the Incoming Webhooks page (if not, you can find it via the side bar).

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Copy the Webhook URL for the webhook you just created and save it as a Val Town environment variable as slackWebhookURL.

Use fetch to send a message

Translate the sample cURL request to a fetch request. You can run the following val:

Send messageRun in Val Town ↗
const res = await fetch(Deno.env.get("slackWebhookURL"), {
method: "POST",
body: JSON.stringify({
text: `Hello, ~World~ from Val Town!`,

If it worked, you will get a message in the channel you configured earlier!

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Ran into a problem? Get help on the Val Town Discord.