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Slack Integration Guide

This guide will help you set up Slack as a notification channel in HookFlo, allowing you to receive real-time alerts in your team’s Slack workspace when webhook events are triggered.
HookFlo now provides a simplified one-click Slack integration that automatically handles permissions and setup. Connect once and use across all your webhooks.

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1

Connect Your Slack Workspace

You can connect your Slack workspace from two places:Option 1: From Profile Settings
  1. Navigate to your Profile → Settings → Integrations
  2. Find the Slack integration section
  3. Click the “Add to Slack” button
  4. Authorize HookFlo in your Slack workspace
  5. Once connected, this workspace will be available for all your webhooks
Option 2: From Webhook Configuration
  1. Go to your webhook’s notification settings
  2. Look for the Slack notification option
  3. Click “Add to Slack” if not already connected
  4. Complete the authorization process
Both methods work identically - connect once and use everywhere.
2

Configure Channel Notifications

  1. In your webhook’s notification settings, toggle Slack notifications ON
  2. Select which channel should receive alerts from the dropdown
  3. If your desired channel doesn’t appear:
    • Go to that Slack channel
    • Type /invite @Hookflo to invite the bot
    • The channel will then appear in the dropdown
  4. Save your settings
Key Points:
  • Each webhook can send alerts to different channels
  • Private channels need the HookFlo bot invited to be selectable
  • One workspace connection works for all webhooks
3

Test Your Setup

  1. Use the test feature in your webhook configuration
  2. Send a test alert to verify it appears in your selected Slack channel
  3. Customize message templates using the Slack template builder if needed
Your Slack integration is now ready to receive real-time webhook alerts!

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Managing Your Connection

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Workspace Management

  • Only one Slack workspace can be connected at a time
  • Change workspaces anytime from Profile Settings → Integrations
  • Switching workspaces applies to all webhooks but requires reconfiguring channel selections

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Permissions

HookFlo requests minimal permissions:
  • chat:write - Send alerts to channels
  • channels:read - List available channels
  • groups:read - Access private channels when invited

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Channel Access

If a channel is disabled or missing from the dropdown:
  1. Go to the Slack channel
  2. Type /invite @Hookflo
  3. The channel will become available for selection

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Legacy Integration Method

The following method is not supported now. Use the simplified method above instead.

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Manual Webhook Setup (Legacy)

1

Create a Slack App

  1. Visit the Slack API website and sign in with your Slack account
  2. Click Create New App
  3. Select From scratch
  4. Enter a name for your app (e.g., “HookFlo Notifications”)
  5. Select the workspace where you want to receive notifications
  6. Click Create App Create Slack App Choose Scratch App Pn
2

Activate Incoming Webhooks

  1. In the left sidebar of your Slack app dashboard, click on Incoming Webhooks
  2. Toggle the switch to On to activate Incoming Webhooks
  3. Click Add New Webhook to Workspace
  4. Select the Slack channel where you want to receive notifications
  5. Click Allow to authorize the webhook
  6. You’ll be redirected back to the Incoming Webhooks page
  7. Copy the generated Webhook URL (it will look like https://hooks.slack.com/services/T00000000/B00000000/XXXXXXXXXXXXXXXXXXXXXXXX) Activate Incoming Webhooks Copy Generated Webhook Url Pn
3

Configure HookFlo

  1. Log in to your HookFlo dashboard
  2. Choose a webhook to Configure Notifications.
  3. Navigate to Notification Channels > Add Channel
  4. Select Slack from the available channels
  5. Give your notification channel a descriptive name (e.g., “Product Team Alerts”)
  6. Paste the Slack Webhook URL you copied earlier
  7. Configure notification preferences:
    • Default Username: Set the display name for notifications (e.g., “HookFlo Alerts”)
    • Default Icon: Enter a URL for a custom icon or use emoji codes like :bell:
    • Message Format: Choose between Simple, Detailed, or Custom formats
  8. Click Save Channel HookFlo Slack Configuration
4

Test Your Integration

To ensure your Slack notifications are working correctly:
  1. In the channel configuration page, click Send Test Message
  2. Select which webhook payload to use for the test (or use a sample)
  3. The test message will be sent to your configured Slack channel
  4. Verify that the message appears as expected
If the test is successful, you’re all set to receive webhook notifications in your Slack channel.

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Slack Templates Customization

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Custom Slack Templating

HookFlo provides Rich Text Editor along with Block editor for Slack Message Customization:
  1. Navigate to Slack Templates in Sidebar
  2. Choose Webhook For which you want to edit the template.
  3. Slack Templates currently do not support dynamic variables will be available soon,
  4. Create your own template using our Slack’s Block Editor
  5. Slack templates have character limits of 1700 characters,
  6. your have full control over how slack message should looks and can be previewed with real time editor
Need more help? Contact our support team or join our Discord forum. or DM me directly on X