Automate your workflows with CustomGPT's RAG (Retrieval-Augmented Generation) platform using n8n or Make.com. This integration enables you to connect CustomGPT with Google Sheets, webhooks, HTTP requests, and thousands of other services to create powerful automation workflows.

More info here - LINK

Get your CustomGPT.ai RAG API key here, needed to use this integration.

Overview

This integration provides pre-built blueprints for connecting CustomGPT with popular automation platforms:

n8n: Open-source workflow automation tool
Make.com (formerly Integromat): Visual automation platform

Use Cases

Automated Q&A: Process questions from Google Sheets and populate answers automatically
Customer Support: Route support tickets through CustomGPT for intelligent responses
Content Generation: Batch process content requests with AI-powered responses
Data Processing: Extract insights from large datasets using CustomGPT's knowledge base
Lead Qualification: Automatically qualify and respond to leads based on your custom data
Knowledge Base Automation: Keep documentation and FAQs up-to-date automatically

Features

No-Code Integration: Visual workflow builder with drag-and-drop interface
Multi-Step Workflows: Chain multiple actions together
Google Sheets Integration: Read questions, write answers, and manage data
HTTP Request Module: Direct API calls to CustomGPT
Error Handling: Built-in retry logic and error management
Scheduled Execution: Run workflows on schedules or triggers
Real-time Processing: Process data as it arrives
Batch Processing: Handle multiple requests efficiently

Prerequisites

CustomGPT Account: Sign up here
CustomGPT API Key: Available in your CustomGPT dashboard
CustomGPT Agent ID: The project/agent ID you want to use
Make.com Account or n8n Instance: Choose your preferred automation platform
Google Account (for Google Sheets integration)

Quick Start Guide

Option 1: Make.com Integration

Step 1: Import the Blueprint

Log in to your Make.com account
Click "Create a new scenario"
Click the three dots menu → "Import Blueprint"
Upload the Google Sheets-HTTP.blueprint.json file
Click "Save"

Step 2: Configure Google Sheets Connection

Click on the Google Sheets module (first module)
Click "Add" next to Connection
Sign in with your Google account
Grant necessary permissions
Select your spreadsheet and sheet:
- Spreadsheet: Choose your spreadsheet
- Sheet Name: Select the sheet (e.g., "Sheet1")
- Table Contains Headers: Yes
- Column Range: A1:CZ1 (adjust based on your needs)

Step 3: Configure CustomGPT API

Click on the HTTP module (second module)
Update the URL with your Agent ID:
```
https://app.customgpt.ai/api/v1/projects/{YOUR_AGENT_ID}/chat/completions
```
Replace {YOUR_AGENT_ID} with your actual CustomGPT Agent/Project ID
Click on "Authorization" header
Replace CUSTOMGPT_API_KEY with your actual API key:
```
Bearer YOUR_ACTUAL_API_KEY
```

Configure the request body:

{
  "messages": [
    {
      "role": "user",
      "content": "{{1.`0`}}"
    }
  ],
  "model": "gpt-4-o",
  "stream": false,
  "lang": "en"
}

Step 4: Configure Response Writing

Click on the Google Sheets module (third module - Update Row)
Verify the connection is set correctly
Map the response to the correct column:
- Row Number: {{1.__ROW_NUMBER__}}
- Column: Select "answers (B)" or your target column
- Value: {{2.data.choices[].message.content}}

Step 5: Test the Workflow

Click "Run once" to test
Check your Google Sheet for results
If successful, click "Schedule" to enable automatic runs

Option 2: n8n Integration

Step 1: Install n8n

Cloud Version:

Sign up for n8n Cloud

Self-Hosted:

# Using npm
npm install n8n -g
n8n start

# Using Docker
docker run -it --rm \
  --name n8n \
  -p 5678:5678 \
  n8nio/n8n

Step 2: Create Workflow

Open n8n in your browser (http://localhost:5678)
Click "Add Workflow"
Add the following nodes:

Node 1: Google Sheets Trigger/Reader

Search for "Google Sheets"
Select "Google Sheets Trigger" or "Read" node
Connect your Google account
Configure:
- Operation: "Read Rows" or "On Row Added"
- Spreadsheet: Select your spreadsheet
- Sheet: Select your sheet
- Filters: Optional filters for rows

Node 2: HTTP Request (CustomGPT API)

Search for "HTTP Request"

Configure:

Method: POST
URL: https://app.customgpt.ai/api/v1/projects/{YOUR_AGENT_ID}/chat/completions
Authentication: Generic Credential Type

Headers:

{
  "Authorization": "Bearer YOUR_API_KEY",
  "Content-Type": "application/json"
}

Body:

{
  "messages": [
    {
      "role": "user",
      "content": "{{ $json.questions }}"
    }
  ],
  "model": "gpt-4-o",
  "stream": false,
  "lang": "en"
}

Node 3: Google Sheets Writer

Add another "Google Sheets" node
Configure:
- Operation: "Update"
- Spreadsheet: Same as before
- Sheet: Same as before
- Row Number: {{ $node["Google Sheets"].json.__ROW_NUMBER__ }}
- Columns: Map the response to your target column

Step 3: Test and Activate

Click "Execute Workflow" to test
Check results in Google Sheets
Click "Active" to enable the workflow

Configuration

Google Sheets Setup

Required Columns:

Column A (questions): Your input questions/prompts
Column B (answers): Where CustomGPT responses will be written

Optional Columns:

Additional metadata columns (C, D, E, etc.)
Status tracking
Timestamps
User information

Example Sheet Structure:

questions (A)	answers (B)	status (C)	timestamp (D)
What is your return policy?	[AI Response]	processed	2025-01-15
How do I reset my password?	[AI Response]	processed	2025-01-15

CustomGPT API Configuration

Available Models:

gpt-4-o (recommended)
gpt-4-turbo
gpt-3.5-turbo
claude-3-opus
claude-3-sonnet
Custom fine-tuned models

Optional Parameters:

{
  "messages": [...],
  "model": "gpt-4-o",
  "stream": false,
  "temperature": 0.7,
  "max_tokens": 1000,
  "lang": "en",
  "session_id": "unique-session-id",
  "metadata": {
    "user_id": "user-123",
    "source": "google-sheets"
  }
}

Advanced Configuration

Rate Limiting:

Add delays between API calls using Make.com's "Sleep" module or n8n's "Wait" node
Implement batch processing for large datasets
Use error handling to retry failed requests

Filters:

Process only rows where Column B is empty
Skip rows marked as "processed"
Filter by date or other criteria

Error Handling:

Configure error handlers in Make.com
Use n8n's error workflow feature
Log errors to separate sheet or database

Workflow Examples

Example 1: Customer Support Automation

Trigger: New row in Google Sheets
↓
HTTP Request: Send question to CustomGPT
↓
Update Row: Write answer back to sheet
↓
Send Email: Notify customer (optional)

Example 2: Batch Content Generation

Schedule: Every hour
↓
Read Rows: Get unprocessed questions
↓
HTTP Request: Process each question through CustomGPT
↓
Update Rows: Write all answers back
↓
Slack Notification: Report completion (optional)

Example 3: Lead Qualification

Webhook: New lead from form
↓
HTTP Request: Analyze lead with CustomGPT
↓
Router: Based on AI response
  ├─ High Priority → Send to sales team
  ├─ Medium Priority → Add to nurture campaign
  └─ Low Priority → Send automated email

API Reference

CustomGPT Chat Completions Endpoint

Endpoint:

POST https://app.customgpt.ai/api/v1/projects/{project_id}/chat/completions

Headers:

Authorization: Bearer YOUR_API_KEY
Content-Type: application/json

Request Body:

{
  "messages": [
    {
      "role": "user",
      "content": "Your question here"
    }
  ],
  "model": "gpt-4-o",
  "stream": false,
  "lang": "en"
}

Response:

{
  "id": "chatcmpl-...",
  "object": "chat.completion",
  "created": 1704067200,
  "model": "gpt-4-o",
  "choices": [
    {
      "index": 0,
      "message": {
        "role": "assistant",
        "content": "The answer to your question..."
      },
      "finish_reason": "stop"
    }
  ],
  "usage": {
    "prompt_tokens": 50,
    "completion_tokens": 150,
    "total_tokens": 200
  }
}

Troubleshooting

Common Issues

1. Authentication Errors

Verify your API key is correct
Ensure "Bearer " prefix is included in Authorization header
Check API key permissions in CustomGPT dashboard

2. Google Sheets Connection Issues

Re-authenticate with Google
Check spreadsheet sharing permissions
Verify sheet name is correct (case-sensitive)

3. Empty Responses

Check your Agent ID is correct
Verify your CustomGPT agent has content/data sources
Check API request format matches documentation

4. Rate Limiting

Add delays between requests
Reduce batch size
Check your CustomGPT plan limits

5. Workflow Not Triggering

Verify trigger conditions are met
Check workflow is activated
Review execution logs

Debug Mode

Make.com:

Click on any module
Click "Run this module only"
Check the output in the inspector panel

n8n:

Click "Execute Workflow"
View execution data in the node
Check browser console for errors

Best Practices

Performance Optimization

Batch Processing: Process multiple rows in chunks
Conditional Logic: Only process rows that need updating
Caching: Store frequently used responses
Error Recovery: Implement retry logic with exponential backoff

Security

API Key Protection
- Never commit API keys to version control
- Use environment variables or credential storage
- Rotate keys regularly
Data Validation
- Sanitize inputs before sending to API
- Validate response data before writing to sheets
- Implement input length limits
Access Control
- Restrict Google Sheets access appropriately
- Use service accounts for production workflows
- Implement audit logging

Cost Management

Monitor Usage: Track API calls and token usage
Optimize Prompts: Keep prompts concise and clear
Set Limits: Implement daily/monthly usage caps
Choose Right Model: Use appropriate model for task complexity

Additional Integrations

Connecting Other Services

The blueprint can be extended to connect with:

Slack: Send notifications or process messages
Email: Gmail, Outlook, SendGrid integration
CRM: Salesforce, HubSpot, Pipedrive
Databases: MySQL, PostgreSQL, MongoDB
Webhooks: Any webhook-enabled service
Storage: Dropbox, Google Drive, AWS S3
Calendar: Google Calendar, Outlook Calendar
Forms: Typeform, Google Forms, Jotform

Multi-Agent Workflows

Use different CustomGPT agents for different tasks:

Router Node
├─ Support Questions → Support Agent (ID: 123)
├─ Sales Inquiries → Sales Agent (ID: 456)
└─ Technical Issues → Tech Agent (ID: 789)

Resources

CustomGPT Resources

Platform Documentation

Video Tutorials

Make.com Tutorial (coming soon)
n8n Tutorial (coming soon)

Support

CustomGPT Issues: Open an issue in the customgpt-integrations repository
Make.com Support: support.make.com
n8n Support: community.n8n.io

Examples & Templates

Check out additional blueprint examples:

Customer support automation
Lead qualification workflow
Content generation pipeline
Data enrichment automation
Multi-language translation
Sentiment analysis workflow

Contributing

Have improvements or additional blueprints to share? Contributions are welcome!

Fork the repository
Create your feature branch
Add your blueprint/workflow
Submit a pull request

License

MIT License - see LICENSE file for details