Slack Webhook Integration

Use Slack Incoming Webhooks with Frevana to send notifications to a Slack channel automatically.

Prerequisites

Before you start, make sure you have:

• A Slack workspace

• Permission to create or install Slack apps

• A Slack channel for Frevana notifications

What Frevana needs

To complete the setup, you will need:

• A Slack webhook URL

• A URL that starts with https://hooks.slack.com/services/

• Access to the Slack channel connected to the webhook

Setup steps

1

Open the Slack app management page

Open Slack API Apps.

Click Create New App to start a new app for this integration.

2

Create the Slack app

Choose From scratch.

Enter a recognizable app name, for example:

Frevana Notifications

Select the Slack workspace where you want to receive notifications.

3

Enable Incoming Webhooks

In the Slack app settings, open Incoming Webhooks.

Turn on Activate Incoming Webhooks.

Slack webhooks are channel-specific. Each webhook sends messages to one authorized channel.

4

Add a webhook to your workspace

Click Request to Add New Webhook .

Choose the Slack channel that should receive notifications.

Click Allow to authorize the app.

5

Copy the webhook URL

Slack will generate a webhook URL like this:

https://hooks.slack.com/services/T00000000/B00000000/XXXXXXXXXXXXXXXXXXXXXXXX

Copy the full URL.

Treat this URL like a secret. Anyone with the URL can post messages to your Slack channel.

6

Save the webhook URL as an environment variable

After you copy the webhook URL, save it as SLACK_WEBHOOK_URL.

macOS / Linux

export SLACK_WEBHOOK_URL="https://hooks.slack.com/services/T00000000/B00000000/XXXXXXXXXXXXXXXXXXXXXXXX"

Windows PowerShell

setx SLACK_WEBHOOK_URL "https://hooks.slack.com/services/T00000000/B00000000/XXXXXXXXXXXXXXXXXXXXXXXX"

Use the full webhook URL exactly as copied from Slack.

Ready to connect

Once the webhook URL is saved, Frevana can send notifications directly to your Slack channel.

Troubleshooting

No message appears in Slack

Verify that:

• The webhook URL was copied completely

• The selected Slack channel still exists

• The workflow or action in Frevana was triggered successfully

invalid_payload or request errors

Verify that:

• The webhook URL is valid

• No extra characters were added before or after the URL

• The webhook has not been revoked in Slack

The webhook URL was exposed

Revoke the compromised webhook in Slack.

Then create a new webhook and replace the old value in Frevana.