Slack API Integration - Webhooks & Workspace Messaging

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

Quirks & Gotchas

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.

Channel Selection Required

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

Generous Character Limit

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

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.

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 2048 characters.

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

See Platform Limits for more details.

Text & Field Limits

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

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.

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

Example

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

API Documentation

Platforms

Guides

Endpoints

Slack

Quirks & Gotchas

Webhook-Based Posting

Channel Selection Required

Generous Character Limit

Custom Bot Identity

Post Options

Media Limits

Text & Field Limits

Analytics

Example

​Quirks & Gotchas

​Webhook-Based Posting

​Channel Selection Required

​Generous Character Limit

​Custom Bot Identity

​Post Options

​Media Limits

​Text & Field Limits

​Analytics

​Example

Quirks & Gotchas

Webhook-Based Posting

Channel Selection Required

Generous Character Limit

Custom Bot Identity

Post Options

Media Limits

Text & Field Limits

Analytics

Example