Slack or Discord Webhook Not Working

Slack or Discord Webhook Not Working

If your webhook notifications aren't being delivered, follow these steps.

1. Use the Test Button

The simplest way to diagnose webhook issues:

  1. Open the monitor's Settings tab
  2. Find the Slack or Discord webhook section
  3. Click Test
  4. Check the target channel for the test message

If the test fails, the webhook URL is likely incorrect or the webhook has been deleted.

2. Check the Webhook URL Format

  • Slack URLs must start with https://hooks.slack.com/services/
  • Discord URLs must start with https://discord.com/api/webhooks/

Make sure you copied the full URL without any trailing spaces.

3. Webhook Was Deleted or Revoked

If someone deleted the webhook from your Slack workspace or Discord server, the URL will no longer work. Create a new webhook and update it in Blimey.

4. Channel Permissions

Make sure the webhook still has permission to post in the target channel. In Discord, check that the channel hasn't been restricted since the webhook was created.

5. Save Before Testing

You must click Save before clicking Test. The test button sends to the currently saved URL, not the URL in the input field.

Last updated on March 5, 2026