Extended Slack Notifications

Extended Slack Notifications

Developed By Deploymentcode

Compatible with WHMCS v8.7

Key Features

That is the most mature Slack Module for WHMCS. It does not only look nice, it also has some cool features! Here are the key features:

  • Supports private channels
  • Message queue - no page load delays when sending messages
  • Get notifications for more than 20 events.
  • Enable / disable notifications individually.
  • Highly customizable message text.
  • Notifications can be posted to multiple channels or persons.
  • HTTP Based API for your own messaging service.
  • Easy PHP function to send slack messages from your own modules. Function is globally available in your WHMCS installation.
  • Module is compatible with Mattermost
  • WHMCS v6, v7, v8 support.
  • PHP 5 and PHP 7 support.


It is useful when you always know what happens in your system. With the Slack for WHMCS module you dont need to refresh the page every 15 minutes to see that there is a ticket waiting for reply. Now you get instantly notified if something happens on your system. You can choose on which events you get alerts, also you can post messages to different and multiple channels or persons.

Unlike other modules, this module does not post the message directly to slack. It does maintain a message queue.

Why a message queue is useful?

If you send messages directly to Slack, there will be a small delay at the page load time for the customer. Your WHMCS Installation will wait until Slack processed your request. Much worse it goes if the slack service is not reachable from your server or the request times out. Then your clients will have a long page load time delay until the API request time outs. But you dont need to care about such cases with this module!

Your own Sender API

With this module you get your own sending API. You can send messages from your own scripts to the slack channels and also can integrate external services with your own, easy to use, HTTP based API. The HTTP based API can be useful if you want to integrate an external monitoring service (like Zabbix or Nagios) into slack.



5 stars
4 stars
3 stars
2 stars
1 star

J S @j4812

December 5, 2022 at 12:47:48 AM

Using this for Mattermost. Works perfectly — and the team even made some modifications to the plugin on short notice to improve its use for our business. Great developer; very happy with the product!

  • 5 months ago

Shaifful Bin Samsudin @shaifful6425

September 1, 2020 at 04:32:14 PM

Hello how can i use this for mattermost?

Tanja Roitner @MB

November 1, 2020 at 11:28:54 PM

Hello Shaifful,

I apologize for the late response. Unfortunately we did not receive any information that there is a new comment.

Yes, the module is compatible with Mattermost. On our website you can order a free trial version to test the module.

If you have any questions, our support team will be happy to help you: support@deploymentcode.com

  • 2 years ago

John Blair @chost

November 9, 2017 at 10:39:12 PM

Very well designed app. The configuration layout is very customizable, yet intuitive at the same time. This is something you don't see much these days. I was able to setup multiple notification groups that go to different channels with ease such as tickets to #support and invoice paid to #billing. Very nice. Also, I was able to customize how the messages looked. My reason for purchasing this product over the other ones was the queuing option. I can't stress how important this is. I have many slack integrations, and one thing I have learned is slack endpoints are unreliable and will go down for no reason without any warning. Setup was easy and well documented. I had a minor problem with getting API to work, but the support was very helpful. Highly recommended app.

  • 5 years ago
  • Version Number 1.1

Version Compatibility

Compatible with WHMCS v8.7

Full Version Compatibility

  • Selected versions of WHMCS v8.7
  • All versions of WHMCS v8.6
  • All versions of WHMCS v8.5
  • All versions of WHMCS v8.4
  • All versions of WHMCS v8.3
  • All versions of WHMCS v8.2
  • All versions of WHMCS v8.1
  • All versions of WHMCS v8.0
  • All versions of WHMCS v7.10
  • All versions of WHMCS v7.9
  • All versions of WHMCS v7.8
  • All versions of WHMCS v7.7
  • All versions of WHMCS v7.6
  • All versions of WHMCS v7.5
  • All versions of WHMCS v7.4
  • Selected versions of WHMCS v7.3
  • All versions of WHMCS v7.2
  • All versions of WHMCS v7.1
  • All versions of WHMCS v7.0
  • All versions of WHMCS v6.3
  • All versions of WHMCS v6.2
  • All versions of WHMCS v6.1
  • All versions of WHMCS v6.0

Support for this product

The best place to start if you need help with a specific product is to contact the developer. All WHMCS Marketplace developers have both a website and support URL listed.

Developed By Deploymentcode


v1.2 Released February 7th, 2020

Latest Version

  • Support for Mattermost


Previous Versions

v1.1 Released August 16th, 2017

View/hide detailed changelog

  • Public Release


See also

Discord Notifications

A simplistic, free & open source hook allowing instant Discord notifications when an action is triggered.

Netgsm Sms

Netgsm Sms addon provides you sending customized bulk sms and creating sms templates.

MSG91 SMS/OTP Plugin

MSG91 WHMCS SMS plugin gives you the power and flexibility to stay connected with your customers by sending them an SMS and OTP's for 2FA at the crucial steps that matters the most.

WHMCS Whatsapp Notification Module

Whatsapp Notification (Open source WHMCS addon module)

SMS Manager

More Advanced SMS System (Two-Factor Authentication)