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Like Discord, Slack uses a webhook-based approach for posting messages.

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Quirks & Gotchas

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Webhook-Based Posting

Slack requires you to connect a workspace and select channels. We use incoming webhooks to post messages.
  • You must be a workspace admin to connect.
  • Posts appear as a bot message in the selected channel.

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Channel Selection Required

You must specify a channelId in your post data. Available channels are in socialAccount.channels.

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Generous Character Limit

Slack allows up to 30,000 characters per message-much more than most platforms.

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Custom Bot Identity

Like Discord, you can customize the bot appearance:
  • username: Up to 80 characters.
  • avatarUrl: A URL to an image for the bot’s avatar.

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Post Options

FieldTypeDescription
channelIdstringRequired. The channel to post to. Found in socialAccount.channels.
textstringMessage content. Max 30,000 characters.
uploadIdsstring[]Media attachments.
usernamestringCustom display name. Max 80 characters.
avatarUrlstringCustom avatar URL. Max 2048 characters.

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Media Limits

ConstraintValue
Files0-4 (images and/or videos, mixed allowed)
Video max size1 GB
Image max size1 GB
TextMax 30,000 characters
See Platform Limits for more details.

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Analytics

For general analytics concepts, see the Analytics Overview. Slack does not provide analytics via its API. All metrics return 0. It’s a workspace tool, not a social media platform.
MetricNote
impressionsReturns 0
viewsReturns 0
likesReturns 0
commentsReturns 0

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Example

await bundle.post.create({
  socialAccountTypes: ["SLACK"],
  data: {
    SLACK: {
      channelId: "C0123456789",
      text: "New product launch! Check it out.",
      username: "Marketing Bot"
    }
  }
});