Slack Bot Poster

Send automated messages to Slack workspaces using your bot token. Perfect for notifications, alerts, scheduled updates, and team automation.

Features

• Simple Messages: Send plain text messages with Slack markdown support
• Rich Blocks: Create beautiful layouts with Slack Block Kit
• Attachments: Use legacy attachments for colored sidebars
• Multi-Channel: Post to multiple channels in a single run
• Thread Replies: Reply to existing message threads
• Custom Branding: Override bot name and icon per message
• Validation Mode: Test channel access before posting

Setup

1. Create a Slack App

1. Go to Slack API Apps
2. Click "Create New App" > "From scratch"
3. Name your app and select your workspace
4. Go to "OAuth & Permissions"
5. Add Bot Token Scopes: chat:write, chat:write.public
6. Click "Install to Workspace"
7. Copy the Bot User OAuth Token (starts with xoxb-)

2. Get Channel ID

1. Right-click the channel in Slack
2. Click "Copy Link"
3. The channel ID is the last part of the URL (e.g., C1234567890)

Usage Examples

Simple Message

{
  "botToken": "xoxb-your-token",
  "channelId": "C1234567890",
  "message": "Hello from Apify! :wave:"
}

Rich Block Kit Message

{
  "botToken": "xoxb-your-token",
  "channelId": "C1234567890",
  "blocks": "[{\"type\":\"section\",\"text\":{\"type\":\"mrkdwn\",\"text\":\"*New Lead Alert* :bell:\\nJohn Smith just signed up!\"}},{\"type\":\"divider\"},{\"type\":\"section\",\"fields\":[{\"type\":\"mrkdwn\",\"text\":\"*Email:*\\njohn@example.com\"},{\"type\":\"mrkdwn\",\"text\":\"*Source:*\\nGoogle Ads\"}]}]"
}

Multi-Channel Broadcast

{
  "botToken": "xoxb-your-token",
  "channelIds": ["C1234567890", "C0987654321", "C5555555555"],
  "message": ":mega: Important announcement for all teams!"
}

Thread Reply

{
  "botToken": "xoxb-your-token",
  "channelId": "C1234567890",
  "threadTs": "1234567890.123456",
  "message": "Adding more details to this thread...",
  "replyBroadcast": true
}

Custom Bot Appearance

{
  "botToken": "xoxb-your-token",
  "channelId": "C1234567890",
  "message": "Daily sales report ready!",
  "username": "Sales Bot",
  "iconEmoji": ":chart_with_upwards_trend:"
}

Output

Each successful post returns:

{
  "channelId": "C1234567890",
  "channelName": "general",
  "messageTs": "1234567890.123456",
  "content": "Hello from Apify!",
  "status": "sent",
  "sentAt": "2024-01-15T10:30:00.000Z",
  "permalink": "https://workspace.slack.com/archives/C1234567890/p1234567890123456"
}

Pricing

• Message Sent: $0.005 per message
• Channel Validated: $0.002 per validation

Block Kit Resources

• Block Kit Builder - Visual builder
• Block Kit Reference - Documentation
• Message Formatting - Markdown guide

Tips

• Use Block Kit Builder to design messages visually, then copy the JSON
• Test with validateOnly: true before sending to production channels
• For DMs, use user IDs (starting with U) as channel IDs
• Schedule runs with Apify's scheduler for recurring messages
• Combine with webhooks for event-driven notifications

Support

For issues or feature requests, visit johnrippy.link

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Built by John Rippy | johnrippy.link