Automate Outbound Voice Calls with VAPI from Form Submissions

This n8n workflow streamlines the process of initiating outbound voice calls via VAPI in response to new form submissions. It allows you to quickly set up a system where user input from a form triggers an automated voice interaction.

What it does

This workflow performs the following steps:

1. Listens for Form Submissions: It acts as a listener for new data submitted through an n8n Form.
2. Edits Fields (Set): It prepares and transforms the incoming form data, likely extracting relevant information needed for the subsequent API call.
3. Waits for a specified duration: Introduces a pause in the workflow execution. This can be useful for rate limiting, allowing external systems to process, or creating a delay before the next action.
4. Makes an HTTP Request: It sends an HTTP request to an external API (likely VAPI, given the context) to initiate an outbound voice call, using the data processed from the form submission.

Prerequisites/Requirements

To use this workflow, you will need:

• n8n Instance: A running n8n instance to import and execute the workflow.
• n8n Form: An n8n Form configured to capture the necessary data (e.g., recipient phone number, call script parameters).
• VAPI Account: An account with VAPI (or a similar voice API service) and the necessary API credentials (API Key, etc.) to make outbound calls.
• API Endpoint: The specific API endpoint for VAPI (or your chosen voice API) to trigger an outbound call.

Setup/Usage

1. Import the workflow: Download the provided JSON and import it into your n8n instance.
2. Configure the n8n Form Trigger:
   • Open the "On form submission" node.
   • Ensure the form is set up to collect the required information for your voice calls (e.g., phoneNumber, message).
   • Activate the form to generate its unique URL.
3. Configure the "Edit Fields (Set)" node:
   • Adjust this node to map the incoming form data to the fields expected by your VAPI API call. For example, you might rename form_phone to toPhoneNumber.
4. Configure the "Wait" node:
   • Set the desired duration for the pause before the HTTP Request.
5. Configure the "HTTP Request" node:
   • Method: Set to POST (or as required by your VAPI API).
   • URL: Enter the VAPI API endpoint for initiating outbound calls.
   • Headers: Add any necessary authentication headers (e.g., Authorization: Bearer YOUR_VAPI_API_KEY).
   • Body: Configure the JSON body with the data required by VAPI, using expressions to pull data from previous nodes (e.g., {{ $json.phoneNumber }}, {{ $json.message }}).
6. Activate the workflow: Once all nodes are configured, activate the workflow.

Now, every time your n8n form is submitted, the workflow will trigger, process the data, wait for the specified duration, and then initiate an outbound voice call via VAPI.