🤖 AI-powered mock job interview with voice, assessment & Gmail reporting

⚡ 119 views · 🤖 AI Chatbots & Agents

Description

AI Mock Interview System - Complete n8n Template

Overview

This n8n workflow template creates a comprehensive AI-powered mock interview system that conducts voice-based interviews, provides real-time transcription, and generates detailed performance assessments. The system uses OpenAI’s GPT-4o Realtime API for natural conversations and automated scoring across five professional criteria.

What This Template Does

Core Functionality

Workflow Components

  1. Interview Setup Form: Collects job role, email, and resume information
  2. Interview Engine: Manages real-time AI conversation flow
  3. Assessment Generator: Analyzes performance and creates detailed reports
  4. Email Delivery: Sends professional assessment reports automatically

Prerequisites

Required Services and Accounts

Estimated API Costs

Step-by-Step Setup Instructions

1. Import the Workflow

  1. Download the workflow JSON file
  2. In your n8n instance, click “Import from file”
  3. Select the downloaded file and import
  4. Verify all nodes are properly connected

2. Configure OpenAI API Integration

Get Your API Key

  1. Visit platform.openai.com/api-keys
  2. Create a new secret key named “Mock Interview System”
  3. Copy the key (format: sk-proj-...)
  4. Ensure billing is enabled on your OpenAI account

Configure in Workflow

Method 1: Direct Configuration

  1. Locate the HTTP Request node for OpenAI
  2. In Headers section, find Authorization parameter
  3. Replace placeholder with: Bearer YOUR_API_KEY

Method 2: Using n8n Credentials (Recommended)

  1. Go to Settings → Credentials in n8n
  2. Add new OpenAI credential
  3. Enter your API key and save as “OpenAI Mock Interview”
  4. Reference this credential in the HTTP Request node

3. Set Up OpenRouter for Assessments

  1. Sign up at openrouter.ai
  2. Generate an API key from the dashboard
  3. In the workflow, find the OpenRouter Chat Model node
  4. Add your OpenRouter credentials
  5. Verify model is set to deepseek/deepseek-r1:free for cost efficiency

4. Configure Gmail Integration

Enable Gmail API

  1. Go to Google Cloud Console
  2. Create a new project or select existing
  3. Enable the Gmail API for your project
  4. Create OAuth 2.0 credentials
  5. Add authorized redirect URIs (n8n will provide these)

Configure in n8n

  1. Navigate to Settings → Credentials
  2. Add new Gmail OAuth2 credential
  3. Enter Client ID and Client Secret from Google Cloud
  4. Complete OAuth authorization flow
  5. Test the connection

Update Email Node

  1. Find the “Send interview assessment report” node
  2. Select your Gmail credentials
  3. Customize the email template as needed
  4. Test email delivery functionality

5. Update Webhook URLs

The template contains placeholder URLs that must be updated for your instance.

Find Your n8n Base URL

Update HTML Forms

  1. Interview Setup Form Node:

    • Find: action="https://n8n.dominixai.com/webhook/start-interview"
    • Replace with: action="https://YOUR_N8N_URL/webhook/start-interview"

  2. Interview Interface Node:

    • Find: https://n8n.dominixai.com/webhook/generate-report
    • Replace with: https://YOUR_N8N_URL/webhook/generate-report

Get Webhook URLs

  1. Click each Webhook trigger node
  2. Copy the Production URL
  3. Use these URLs in your HTML form actions

Testing the System

Component Testing

  1. API Connection Test: Execute the OpenAI HTTP Request node to verify connectivity
  2. Email Test: Send a test assessment report to your email
  3. Assessment Generation: Test the OpenRouter node with sample transcript data

Full System Test

  1. Activate the workflow
  2. Navigate to the interview setup webhook URL
  3. Fill the form with test data:
    • Job Role: “Software Developer”
    • Your email address
    • Sample resume content
  4. Complete the interview process
  5. Verify assessment email delivery

Customization Guide

Interview Duration

Modify the timer in the Interview Interface HTML:

const interviewDuration = 15; // Change to desired minutes

Assessment Criteria

Edit the prompt in the “Interview Assessor” node to:

Question Customization

Update the conversation prompt to:

Branding and Styling

Advanced Customizations

Workflow Architecture

Node Structure

Data Flow

  1. User submits setup form → Resume processing
  2. Interview initialization → OpenAI session creation
  3. Real-time conversation → Transcript generation
  4. Interview completion → Assessment analysis
  5. Report generation → Email delivery

Security and Privacy

Data Handling

Security Best Practices

Troubleshooting

Common Issues

OpenAI API Errors

Email Delivery Problems

Webhook Connection Issues

Interview Interface Problems

Debug Steps

  1. Enable workflow execution logging
  2. Test individual nodes in isolation
  3. Check API response status codes
  4. Verify credential configurations
  5. Monitor workflow execution logs

Performance Optimization

API Efficiency

Scalability Considerations

Use Cases and Applications

Educational Institutions

Corporate Training

Career Coaching

HR and Recruitment

Conclusion

This AI Mock Interview System template provides a complete solution for automated interview practice and assessment. With proper setup and customization, it can serve various educational, corporate, and professional development needs while maintaining cost efficiency and user privacy.

The modular design allows for extensive customization while the automated assessment system provides consistent, objective feedback to help candidates improve their interview performance.

If you would rather avoid setup hassles, you can check HERE

Turn Interview Anxiety Into Interview Success

🔗 Nodes Used

Webhook, Gmail, Basic LLM Chain, OpenRouter Chat Model

📥 Import

Download workflow.json and import into n8n: Workflow menu → Import from File

📖 Importing guide · 🔑 Credential setup