Auto-Call New Typeform Submissions with Vapi Voice Assistant

This n8n automation connects your Typeform forms with Vapi AI, allowing you to immediately call new form respondents with a personalized message from a Vapi AI assistant, as soon as a form submission is received.

🧾 Requirements

Typeform

• A Typeform account
• Typeform personal access token and credentials enabled in n8n
• A Typeform form published that includes a phone number field

Vapi

• A Vapi account with credit
• A connected phone number to make calls
• An assistant created and ready to make calls
• Your Vapi API key

🔗 Useful Links

• n8n Typeform Credentials Setup
• Vapi Docs

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🔄 Workflow Breakdown

1. Trigger: Typeform Submission

• Triggered when a new response is submitted to your Typeform.
• The form must include a phone number field.

2. Wait 2 Minutes

• Adds a short delay before proceeding.
• Useful to ensure form data is fully synced or to give time for related automations.

3. Set Vapi Fields (Manual Step)

• Set the required fields for the Vapi API call:
  • phone number id - connected in Vapi
  • assistant id - the assistant enabled in the call
  • Vapi API key - your secure API key

4. Start Outbound Vapi Call

• Sends a POST request to https://api.vapi.ai/call
• Payload includes:
  • Respondent’s phone number (from Typeform)
  • Vapi assistant id
  • Vapi phone number id to initiate the call

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✏️ Template Customization Guidance

How to Adapt for Your Specific Needs

• Personalize the Call Content:
  Include additional fields in your Typeform (e.g., first name, interest, location). In n8n, map these form fields into the payload sent to Vapi. Update your Vapi assistant’s prompt/script to reference these variables for a highly personalized experience.

• Conditional Call Logic:
  Use n8n's logic nodes (e.g., IF, Switch) to, for example:

  • Only trigger calls if a respondent checks a checkbox (e.g., consent or interest).
  • Use a different Vapi assistant or phone number based on responses (e.g., language preference or location).

• Advanced Routing:
  Configure the workflow to choose different assistants, phone numbers, or call scripts based on the respondent’s answers. Store assistant IDs or numbers as environment variables or reference them from a lookup table for dynamic selection.

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📞 Examples: Using Form Data to Personalize Calls

• Greeting by Name:
  If your Typeform collects first_name, map it into the Vapi payload. Your assistant script can begin, "Hi {{first_name}}, thanks for your interest in XYZ!"

• Custom Message Based on Product Interest:
  Add a product_interest field in Typeform. Pass its value to Vapi and have the assistant mention the product, e.g., “I see you’re interested in our Premium Plan…”

• Reference Appointment Times or Locations:
  Collect appointment_time and/or city fields, and tailor the call to reconfirm booking details using these inputs.

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🛠️ Troubleshooting & Tips

• Call Not Triggering:
  Ensure your Typeform webhook connection and credentials are correctly set up in n8n. Check that your workflow is active and the trigger node is configured for the correct form.

• Invalid Phone Number Format:
  Vapi requires numbers in full international format (e.g., +11234567890). Use n8n expressions to clean or verify the incoming number if needed.

• Missing Data in the Call:
  Confirm that additional fields (e.g., first_name) exist in the Typeform response and that your mapping in n8n matches the exact field names.

• Failed API Call:
  Double-check your Vapi phone number id, assistant id, and API key. Use n8n’s execution logs to inspect the payload sent to Vapi for debugging.

• Duplicate Calls:
  If your Typeform allows multiple submissions, add logic in n8n to check for and avoid duplicate calls, for example by maintaining a record of called numbers.

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