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Automate Instagram posts with Google Drive, AI captions & Facebook API

SagarSagar
8626 views
2/3/2026
File ManagementGoogle DriveAutomationNotionGmail
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This template streamlines your Instagram content posting workflow by connecting Google Drive for image storage, using OpenAI for AI-generated captions, and leveraging Facebook Graph API for automated publishing.

Pre-requisites Before setting up this workflow, ensure you have:

  1. A Google account with access to Google Drive

  2. An OpenAI API key for AI caption generation

  3. A Facebook Developer account with Instagram Graph API access

  4. An Instagram Business or Creator account connected to a Facebook Page

  5. n8n.io account with workflow access

Setup Instructions

  1. Configure Data Source Create a Google Sheet with the following columns:

Name: Filename of your image in Google Drive

Caption: Optional custom caption (leave empty for AI-generated captions)

URL: your Video Reel or Image in Google Drive

  1. Connect Google Drive Add your Google Drive credentials in the "Google Drive" node

Specify the folder path where your Instagram image/Video are stored

Configure the node to retrieve image files based on filenames from your Google Sheet

  1. Set Up OpenAI Integration Add your OpenAI API key to the credentials

Configure the OpenAI node to generate engaging captions based on image content

Adjust temperature and model parameters for desired creativity level

  1. Configure Facebook Graph API Connect your Facebook account with Instagram access

Set up the Facebook Graph API node to post to your Instagram Business/Creator account

Ensure proper image formatting (1:1, 4:5, or 16:9 aspect ratios supported by Instagram)

  1. Workflow Automation Setup Configure the scheduler node to run at your preferred frequency

Set up error handling to notify you of any posting failures

Add conditional nodes to use either custom or AI-generated captions

Execution Instructions After completing all connections, test the workflow with a single image

Monitor the execution in the n8n dashboard to ensure proper functioning

View the "Executions" tab to track successful posts and troubleshoot any errors

Adjust posting frequency and scheduling as needed

This template saves hours of manual Instagram posting work while maintaining an authentic presence. Perfect for social media managers, content creators, and businesses looking to maintain consistent Instagram activity without the daily manual effort.

The workflow handles image retrieval, caption generation or customization, proper Instagram API formatting, scheduled posting, and execution tracking - all in one automated solution.

Automate Instagram Posts with Google Drive & AI Captions (Facebook API)

This n8n workflow automates the process of creating and publishing Instagram posts. It monitors a Google Drive folder for new images, generates AI-powered captions using OpenAI, and then publishes the image and caption to Instagram via the Facebook Graph API.

What it does

  1. Triggers on New Google Drive Files: The workflow starts whenever a new file (presumably an image) is added to a specified Google Drive folder.
  2. Retrieves File Details: It then fetches the details of the newly added file from Google Drive.
  3. Generates AI Caption: The workflow sends the image to OpenAI to generate a suitable caption for the Instagram post.
  4. Creates Instagram Post: Finally, it uses the Facebook Graph API to create and publish an Instagram post with the image from Google Drive and the AI-generated caption.

Prerequisites/Requirements

To use this workflow, you will need:

  • n8n Account: A running instance of n8n.
  • Google Drive Account: A Google Drive account with a specific folder set up for new images.
  • OpenAI API Key: An OpenAI API key for generating captions.
  • Facebook Developer Account: A Facebook Developer account with an app configured for Instagram Graph API access. You'll need an Instagram Business Account linked to a Facebook Page.

Setup/Usage

  1. Import the Workflow: Download the provided JSON and import it into your n8n instance.
  2. Configure Google Drive Trigger:
    • Set up your Google Drive credential.
    • Specify the Google Drive folder ID that the workflow should monitor for new files.
  3. Configure Google Drive Node:
    • Ensure this node uses the same Google Drive credential.
    • It will automatically receive the file ID from the trigger.
  4. Configure OpenAI Node:
    • Set up your OpenAI API Key credential.
    • Configure the prompt to generate captions based on the image content. You might need to adjust the prompt to suit your desired caption style.
  5. Configure Facebook Graph API Node:
    • Set up your Facebook Graph API credential. This typically involves obtaining an Access Token for your Instagram Business Account.
    • Configure the node to use the image URL from the Google Drive node and the generated caption from the OpenAI node to create an Instagram post.
  6. Activate the Workflow: Once all credentials and configurations are set, activate the workflow.

Now, whenever you upload a new image to your specified Google Drive folder, the workflow will automatically generate a caption and post it to your Instagram account!

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