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Auto-generate & post social media content with GPT-4, Notion & Instagram API

Supira Inc.Supira Inc.
1596 views
2/3/2026
AIWebhookImage AnalysisGoogle GeminiVision
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How It Works

This workflow automates social media content creation and posting. It starts by receiving raw text input through a Webhook (for example, from LINE Bot) and saves the content into a Notion database for centralized storage. Next, GPT-4 generates platform-specific captions for Instagram, Threads, X/Twitter, and Blog. Instagram captions are prepared for automatic publishing, while Threads, X, and Blog drafts are stored in Notion for later review and manual posting.

The workflow then fetches book cover images or other visuals from external APIs such as Google Books, OpenBD, or OpenLibrary. The chosen image is uploaded to Cloudinary to generate a secure, optimized URL. Finally, the Instagram Graph API is used to create a media container and publish the post automatically with the caption and image. This way, the workflow provides both automation for Instagram and reusable drafts for other platforms.

Requirements

  • Notion account with a database configured for text and captions
  • Cloudinary account for image hosting
  • Instagram Business account connected to the Meta Developer Platform
  • GPT-4 (via OpenAI or LangChain node in n8n)

Setup Instructions

  1. Configure the Webhook node to capture text input.
  2. Update the Notion database ID and property keys to match your schema.
  3. Add Cloudinary credentials (【cloud_name】, 【upload_preset】) in the HTTP Request node.
  4. Set 【IG_ACCESS_TOKEN】 as an environment variable.
  5. Activate the workflow and test with a sample input.

Customization

  • Adjust caption prompts for style, hashtags, or character limits.
  • Add additional GPT nodes for more platforms.
  • Replace or extend image sources as needed.
  • Integrate a scheduler (Cron node) to post at specific times.

n8n Workflow: Auto-Generate & Post Social Media Content with GPT-4, Notion, & Instagram API (Placeholder)

This n8n workflow is designed to automate the process of generating social media content using AI and posting it to various platforms. It leverages OpenAI for content generation and Notion for content management, with a placeholder for social media posting via an HTTP Request node.

Note: The provided JSON currently contains only a basic structure with a Webhook trigger, an OpenAI node, a Notion node, and an HTTP Request node. The full functionality for auto-generating and posting to social media (like Instagram API) would require further configuration within the HTTP Request node or dedicated social media nodes.

What it does (Based on current JSON):

  1. Triggers on Webhook: The workflow starts when a Webhook receives a request. This could be triggered manually, by another system, or on a schedule.
  2. Generates Content with OpenAI: It then sends data to the OpenAI node, presumably to generate social media post content (e.g., captions, hashtags, ideas) using an AI model like GPT-4.
  3. Manages Content in Notion: The generated content is then passed to a Notion node, indicating that it will be stored or updated within a Notion database for content management, review, or scheduling.
  4. Initiates HTTP Request: Finally, an HTTP Request node is triggered. This node is a placeholder and would need to be configured to interact with a social media API (like Instagram's) to post the content.

Prerequisites/Requirements:

  • n8n Instance: A running instance of n8n.
  • OpenAI API Key: An API key for OpenAI to access their language models (e.g., GPT-4).
  • Notion Integration: A Notion workspace and an integration token to interact with your Notion databases.
  • Social Media API Access: If you intend to post to a specific social media platform (e.g., Instagram), you will need API access and credentials for that platform. The HTTP Request node will need to be configured accordingly.

Setup/Usage:

  1. Import the Workflow:
    • Download the provided JSON file.
    • In your n8n instance, go to "Workflows" and click "New".
    • Click the "Import from JSON" button and paste the workflow JSON or upload the file.
  2. Configure Credentials:
    • OpenAI Node: Configure the OpenAI node with your OpenAI API Key.
    • Notion Node: Configure the Notion node with your Notion API Key/Integration Token and specify the database or page you wish to interact with.
  3. Configure Webhook Trigger:
    • Activate the Webhook node to get its unique URL. This URL will be used to trigger the workflow.
  4. Configure HTTP Request Node (for Social Media Posting):
    • This is the crucial step for social media integration. You will need to edit the "HTTP Request" node.
    • Set the URL, Method (e.g., POST), Headers (e.g., Authorization tokens), and Body (the content to be posted) according to the documentation of the social media API you wish to use (e.g., Instagram Graph API).
    • Map the output from the Notion or OpenAI nodes to the Body of the HTTP Request to send your generated content.
  5. Activate the Workflow: Once all credentials and configurations are set, activate the workflow.
  6. Trigger the Workflow: Send a request to the Webhook URL to initiate the content generation and (potential) posting process.

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