Slack

Slack uses a webhook-based method for message delivery, similar to Discord — ideal for automating internal communications.

Quirks & Gotchas

Webhook-Based Posting

Workspace admin access is required to establish the connection.
Messages appear as bot communications in the designated channel.
The platform uses incoming webhooks for message delivery.

Channel Selection Required

Posts require a channelId parameter in your submission data. Available channels appear in socialAccount.channels.

Generous Character Limit

Slack accommodates up to 30,000 characters per message — significantly more than most competing platforms.

Custom Bot Identity

Customize bot presentation through:

username: up to 80 characters.
avatarUrl: image URL for the bot's profile picture.

Media Limits

Constraint	Value
Files	0–4 (images and/or videos, mixed allowed)
Video max size	1 GB
Image max size	1 GB
Text	Max 30,000 characters

Text & Field Limits

Field	Limit
`text`	Max 30,000 characters
`username`	Max 80 characters
`avatarUrl`	Max 2,048 characters

Post Options

Field	Type	Description
`channelId`	`string`	Required. The channel to post to. Found in `socialAccount.channels`.
`text`	`string`	Message content. Max 30,000 characters.
`uploadIds`	`string[]`	Media attachments.
`username`	`string`	Custom display name. Max 80 characters.
`avatarUrl`	`string`	Custom avatar URL. Max 2,048 characters.

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

Analytics

Slack does not provide analytics through its API. All metrics return zero — it's a workspace tool, not a social platform.

Metric	Note
`impressions`	Returns `0`
`views`	Returns `0`
`likes`	Returns `0`
`comments`	Returns `0`

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