Tassos Marinos Developer of Joomla Extensions

Webhooks Addon

Published in Convert Forms
Updated 19 May, 2024

A webhook (otherwise known as a web callback or HTTP push API) allows you to automatically send real-time information from your form to some other service or tool outside of your Joomla site without writing a single line of code. In addition, you can trigger a webhook conditionally based on a user’s choice within a form — making your forms extremely intuitive.

The Webhooks app is a fantastic choice if the endpoint you seek to use is not currently available within the app’s actions or if there is no direct integration for your favorite service. It can be a great alternative to our Zapier addon for technical users. You can send GET and POST requests to any external API and create custom integrations. With some technical know-how, this opens up the doors to continuous integrations!

This tutorial will show you how to use the Webhooks app with Convert Forms.

Table of Contents

Setting Up a Webhook
Example: Using Webhooks to Create a new Article on a remote Joomla 4 site


To use Webhooks, you will need Convert Forms 4+ Pro. You can can easily upgrade to Pro if you're currently in the Free version. Additionally, you will need to ensure your server has the cURL extension enabled.

Setting Up a Webhook

To get started, you’ll need to create a new form or edit an existing one. After opening the form builder, go to the Tasks panel and click Create Your First Task. This starts the process of creating a new task.

Upon opening the pop-up dialog, you will see a list of apps. Search for the webhook app. Your screen should look like this:


Next, we must choose the proper trigger to fire the task at the right time. 

  1. Select New Submission in the Trigger option.
  2. Select Send Webhook in the Action option.

Your screen should look like this:


In the next screen, you will see all available settings to configure the webhook. We’ve outlined what each of these does below.



The URL that will connect Convert Forms to the external app. You can usually get this URL from the service or tool’s API you want to connect to.


The method option allows you to select the HTTP method representing the webhook's desired action. The primary or most-commonly-used HTTP verbs (or methods, as they are properly called) are GET and POST. There are some other verbs, too, but they are utilized less frequently. 

  • GET: Requests a representation of the specified resource. The request should only retrieve data.
  • POST: Submits an entity to the specified resource.
  • PUT: Replaces all current representations of the target resource with the request payload.
  • PATCH: Applies partial modifications to a resource.
  • HEAD: Asks for a response identical to a GET request but without the response body.
  • DELETE: Deletes the specified resource.
  • OPTIONS: Describes the communication options for the target resource.
  • TRACE: Performs a message loop-back test along the path to the target resource.


The Headers option allows you to define the HTTP request header’s keys and values to be sent with your webhook request.


Similar to the Headers, the Data setting lets you define the keys and values that will be sent in the body of your webhook’s request.


The Unflatten option in Webhook actions allows you to create nested data from a key with two underscores.

For example, if you have this key and value for data:


If you select Yes for Unflatten and JSON for Payload Type, that data will ultimately get sent like this:

  parent: {
    child: hello

To opt out of this functionality, select "no" for the "Unflatten" option, which will send the data like this:

  parent__child: hello


The Format option will communicate to your server what type of data is sent through your webhook. This will also set the Content-Type header value for your data.

There are two different request format types available:

  • JSON: The JSON method will format your data in an application/json format and set the content type as charset=utf-8.
  • FORM: The FORM method will format your data in an application/x-www-form-urlencoded format, and will set the content type as charset=utf-8.

Example: Using Webhooks to Create a new Article on a remote Joomla 4 site

This example will walk you through configuring a form that sends a webhook to a remote Joomla 4 site and creates a new article based on user input. The webhook will talk to a specific API endpoint exposed by Joomla 4’s new Web Services API. The form will consist of two fields, one textbox field for the article’s title and one text editor field for the article’s text. The form should look like this:

convertforms webhooks create article form

Note: In this example, where you see the word "site" we will refer to the website where Convert Forms is installed, and where you see the word “remote site” we will refer to the website where we want to create the new article. 


To use this example, the remote site must meet the following requirements:

  • The site runs on Joomla 4.
  • The site is publicly accessible.
  • The site is not password protected with htaccess.
  • You have Super User access.
  • The following plugins are installed and enabled:
    • User - Joomla API Token: Allows remote access to your site.
    • API Authentication - Web Services Joomla Token: Allows token-based authentication to Web services.
    • Web Services - Content: Adds article routes to the API.

Step 1: Get your Super User Joomla API Token

Joomla 4 Web Services API enables a site to talk to other sites and services via API call requests. Every request requires authentication (unless designated a public URL). In our case, we are going to use API token authentication. 

To get your API token, follow the steps below:

  • Log into the remote site backend as a Super User.
  • Go to the User Menu (top right of screen).
  • Select Edit Account.
  • Click on the Joomla API Token tab.
  • Click Copy next to the Token option.

convertforms webhooks create article api

Keep in mind that on the same screen, you can copy your token, enable or disable it, and reset it if you need to revoke access and generate a new token.

Step 2: Prepare the Webhook

Now that you have copied your API token let’s configure your form to send the webhook to the appropriate API endpoint to the remote site whenever someone submits the form. The first steps are the same as in the Setting Up a Webhook section above.

  1. Open the form builder on your site
  2. Go to the Tasks panel and click Create Task
  3. In the dialog that opens up, search for the webhook app and click it to continue.

In the next screen, you need to select the task’s trigger and action.

  1. Select New Submission in the Trigger option.
  2. Select Send Webhook in the Action option. 
  3. Click Continue.

Step 3: Setup the Webhook 

The next and last screen is where the magic happens. Here are the settings we need to configure.


The API endpoint responsible for creating a new article is /api/index.php/v1/content/articles. Assuming the URL of the remote site is https://mysite.com, the webhook’s URL option must be set to:


convertforms webhooks create article url


Since we will create a new record in the remote site database, we select POST in the Method option.


The Web Services API expects to see the API token in the request HTTP headers. To do so, create a new row in the Headers option and enter X-Joomla-Token as the header key and the API Token you copied previously as the header’s value.

The Headers option should look like this: 

convertforms webhooks create article headers


In this option, we define what data will be sent with the request in key-value format or, in other words, what will be our article's title and text. In our case, we will pass the minimum required properties by the Create Article endpoint, which are the following:

  • title: This represents the title of the article. Map this option with the Article Title field from the dropdown.
  • articletext: This represents the text of the article. Map this option with the Article Text field from the dropdown.
  • catid: This is the ID of the category we want to assign the article. In our case, we will use the fixed value 2, which is the ID of Joomla’s Uncategorized category.
  • Language: The endpoint also expects to see the language property in the request. For this example, we will not assign the article to any language; therefore, enter * for its value.

Your Data option should look like this: 

convertforms webhooks create article data

Now, you would ask, what about custom fields? Can we also set article custom fields via the same webhook? The answer is yes. For the endpoint to recognize a custom field value, it expects to see a key in the format com_fields__FIELD where FIELD is the alias of the custom field.

For example, let's say you have two custom fields for Age and Color. The Data option should be like this:


Additionally, the Create Articles endpoint also supports passing the intro and full-text images using the images__image_intro and images__image_fulltext keys, respectively:


To add tags to an article, pass the Tags property as an array. Each value can be either the ID or the name of the tag.

If the tag already exists, provide the IDs of the tags. For example, the example in the screenshot below will add the tags with IDs 3 and 2 to the article:

Image Placeholder

The Create Article endpoint also supports adding tags by name, regardless of their existence. To pass a tag by name, prefix the tag with #new#. For instance, the example below associates the tag myTag with the article. If the tag doesn't exist, it will be created. If a tag with the same name already exists, it won't be duplicated.


Remember that the Unflatten option should be set to Yes.

Final Steps

The final step is to enable our task. To do so, click the toggle on the dialog’s top right corner, as shown in the screenshot below.

Finally, click Save to save the task, close the dialog, and then click Save from the top right corner of the form builder to save the changes on the form.

Step 4: Test Your Form

Now, it’s time to verify our form works. Publish your form on the front end and make a test submission. You should see a new article created on the remote site if everything is configured properly.

convertforms webhooks create article new articles

Congratulations! You’ve successfully created a form that creates a new article on a remote site every time it is submitted!