--- title: "[Automations guides and connectors] - Sub Automation Trigger" description: Documentation for configuring and using the Sub Automation Trigger connector in Automation Hub. url: https://www.contentstack.com/docs/developers/automation-hub-connectors/sub-automation-trigger product: Automation Hub doc_type: connector-guide audience: - developers - automation-builders version: v1 last_updated: 2026-03-26 --- # [Automations guides and connectors] - Sub Automation Trigger This page explains what the Sub Automation Trigger is and how to configure it in Automation Hub, including an end-to-end example that uses the ChatGPT connector and a Response connector. It is intended for developers and automation builders who need to invoke sub automations as part of a larger automation workflow. ## Sub Automation Trigger The Sub Automation trigger lets you invoke sub automation. You can define the schema of the sub automation using the **Key **and **Type **field. **Note: **A sub automation involves creating smaller, specialized automation tasks as part of a larger automation process. These sub automations help break down complex tasks into more manageable steps, making it easier to design, implement, and maintain the overall automation process. ## Set up the Sub Automation Trigger Perform the following steps to configure the Sub Automation trigger: - Click **Configure Trigger** from the left navigation panel. - Within the **Configure Trigger **step, click the **Sub Automation** connector. - Under **Choose Trigger** tab, select the **Sub Automation Trigger**. - Enter the **Description **of the trigger.**Note: **The description in the schema can be helpful while using the [ChatGPT](/docs/developers/automation-hub-connectors/chatgpt#action-4-select-the-function-calling-action) Function Calling action to briefly describe the schema defined in the sub automation trigger. - Under the **Schema **field, enter the value in the **Key **field and select the **Type **from the dropdown. Click **+ Add Schema **button to add multiple values. Additionally, you can also mark the **Required **checkbox to make it mandatory. - Click the **Proceed **button. - Click the **Test Trigger **button to test the configured trigger. - Click the **Save and Exit **button. **Note: **After successfully configuring a trigger, if you re-configure any other trigger you will be prompted to revert to the previously configured trigger. You can revert back to the last trigger configurations by clicking the **Revert Changes **button. This sets the **Sub Automation **trigger connector. Let’s see an example to convert a given string in German language using the Sub Automation trigger. Follow the steps below to configure the sub automation trigger: - Within the** Configure Trigger **step, click the **Sub Automation Trigger**. - Under the **Choose Trigger **section, select **Sub Automation **trigger. - Enter the **Description **of the sub automation. For example, *Convert a given text in German Language*. - In the **Key **field, enter the string you want to convert. For example, *Top 10 ways to improve communication skills? *In the **Type **field, select String from the dropdown and mark the **Required **checkbox. - Click the **Proceed **button. - Click the** Test Trigger **button to test the configured trigger. - Click the **Save and Exit **button. Let’s configure the [ChatGPT](/docs/developers/automation-hub-connectors/chatgpt) connector to view the converted text. - Within the **Configure Action Step**, click the **ChatGPT **connector. - Under **Choose an Action** tab, select the **Chat **action. - Click the **+ Add New Account **button to add your ChatGPT account.**Additional Resource:** Refer to the [ChatGPT](/docs/developers/automation-hub-connectors/chatgpt) connector documentation for adding the account. - Select the **API Model** from the dropdown list to generate content for the chat responses.**Note: **Different models are available to different users based on the account the user holds such as paid accounts. You must check the account access before selecting the model. - Provide the **Prompt Text **to generate the chat response(s). You must select the output from the sub automation trigger. For example, convert the given string into German. - Select the **Role **from the dropdown options to send to the API model request. By default, the role is set to the user.**Additional Resource: **There are three different types of roles provided by the OpenAI platform. The **system **role sets the response context, the **assistant **role provides the response content, and the **user **role asks the prompt. - Click **Proceed**. - Click **Test Action **to test the configured action. - Click the **Save and Exit **button. You will see the input string converted into German language. Now let’s configure a **Response **connector to send the output. - Within the **Configure Action Step**, click the **Response **connector. - Under **Choose an Action **tab, select the **Response **action. - Based on the results of your configured action, enter the **Response **Status. - In the **Response Body **field, you can add the data that you want to send as the response. As per our example, select the message content from the ChatGPT action. - Add **Response Headers **to provide any additional information. - Click **Proceed**. - To execute and test the configured action, click **Test Action**. - On successful configuration, you can see the below output. Click **Save and Exit**. Activate the automation to check the output. You can use this sub automation trigger to invoke a sub automation action. Both are **interdependent **on each other. ## Common questions ### What is the Sub Automation Trigger used for? It is used to invoke sub automation and define the schema of the sub automation using the **Key **and **Type **field. ### Can I make schema fields mandatory? Yes. You can mark the **Required **checkbox to make it mandatory. ### Why should I add a description to the trigger schema? **Note: **The description in the schema can be helpful while using the [ChatGPT](/docs/developers/automation-hub-connectors/chatgpt#action-4-select-the-function-calling-action) Function Calling action to briefly describe the schema defined in the sub automation trigger. ### What happens if I re-configure another trigger after configuring one? **Note: **After successfully configuring a trigger, if you re-configure any other trigger you will be prompted to revert to the previously configured trigger. You can revert back to the last trigger configurations by clicking the **Revert Changes **button.