AI Instagram Image Agent – Unlimited Auto-Generated IG Posts With Captions & Flux Images (n8n)

Built using n8n + DeepSeek + Together AI + EXA AI + Google Sheets + ScreenshotOne + Meta Graph API, this system replaces an entire content team.

How the Automation Works

1. Intelligent Topic Injection

The system starts by loading your topic (“Post Topic”) and generating a unique ID to avoid storage caching.

(Global Variable node)

2. AI Converts Topic → Search Query

DeepSeek analyzes your topic and generates a natural-language search phrase based on the category.

(Get Natural Language Account)

3. EXA AI Fetches Supporting Content

EXA retrieves relevant articles, broken into chunks using Split Out, then limited to top 3.

(Exa Get Content → Split Out → Limit)

4. DeepSeek Writes an Instagram Caption

The system rewrites the article into a polished Instagram caption with:

• Clear hook

• Clean structure

• Professional tone

• Max 5 hashtags

• No emojis

(Convert into Instagram Content)

5. AI Converts Caption → FLUX Image Prompt

DeepSeek extracts visual elements and converts them into a Flux-compatible 9:16 design prompt.

(Convert into Image Prompt)

6. Together AI Generates the Flux Image

A Flux 1-schnell image (1024×1024) is produced in base64 format.

(Get Image Base64)

7. Save Image to Cloud Storage

The base64 is converted to a JPEG file and stored in Google Cloud.

(Convert to Image → Save Image)

8. Generate an 8-Word Image Title

DeepSeek analyzes the caption and produces a clean, professional 8-word title.

(Get Image Text)

9. Create Dynamic Preview Page

The system inserts the title and image URL into a customizable preview link.

(Preview Link node)

10. Capture Preview Screenshot

ScreenshotOne loads the preview page and captures a rendered JPEG.

(Request Screenshot → Save Screenshot)

11. Log Content Into Google Sheets

The automation adds:

• Instagram Image Link

• Flux Image Link

• Caption

Into the “Schedule” sheet.

(Update Record)

12. Publish Directly to Instagram

The system:

• Fetches long-lived access token

• Finds the linked IG business account

• Uploads media

• Waits 20 seconds

• Publishes the post

• Updates the “Status” → Posted

Your IG feed gets populated automatically — no manual posting required.

Tools Used in This Automation

(All confirmed from the JSON workflow)

DeepSeek AI (search query generation, caption writing, image prompt conversion, title generation) EXA AI (content extraction & research) Together AI (FLUX.1-schnell) (image generation) ScreenshotOne API (preview screenshot generation) n8n (automation workflow control) Google Cloud Storage (image storage) Google Sheets (post scheduling & tracking) Redis (token storage) Meta Graph API (Instagram Publishing) Andynocode Preview API (dynamic preview rendering)

Perfect For

• Instagram theme pages

• Motivational pages

• Automated content channels

• AI influencers

• Agencies managing client IG feeds

• Anyone wanting unlimited daily IG posts without design work

This is a complete AI-powered content engine that turns simple topics into polished Instagram posts automatically — forever.