Generate images with Pollinations & blog articles with Gemini 2.5 from Telegram

This n8n workflow is a Telegram bot that allows users to either:

• Generate AI images using Pollinations API, or
• Generate blog articles using Gemini AI

Users simply type image your prompt or blog your title, and the bot responds with either an AI-generated image or article.

Who's it for

This template is ideal for:

• Content creators and marketers who want to generate visual and written content quickly

• Telegram bot developers looking for real-world AI integration

• Educators or students automating content workflows

• Anyone managing content pipelines using Google Sheets

What it does / How it works

Telegram Interaction

• Trigger Telegram Message: Listens for new messages or button clicks via Telegram

• Classify Telegram Input: JavaScript logic to classify input as /start, /help, normal text, or callback

• Switch Input Type: Directs the flow based on the classification

Menu & Help

• Send Main Menu to User: Shows "Generate Image", "Blog Article", "Help" options

• Switch Callback Selection: Routes based on button pressed (image, blog, or help)

• Send Help Instructions: Sends markdown instructions on how to use the bot

Input Validation

• Validate Command Format: Ensures input starts with image or blog

• Notify Invalid Input Format: If validation fails, informs user of correct format

Image Generator

• Prompt User for Image Description → When user clicks Generate Image

• Detect Text-Based Input Type → Detects if text is image or blog

• Switch Text Command Type → Directs whether to generate image or article

• Show Typing for Image Generation → Sends "uploading photo..." typing status

• Build Image Generation URL → Constructs Pollinations API image URL from prompt

• Download AI Image → Makes HTTP request to get the image

• Send Image Result to Telegram → Sends image to user via Telegram

• Log Image Prompt to Google Sheets → Logs prompt, image URL, date, and user ID

• Upload Image to Google Drive → Saves image to Google Drive folder

Blog Article Generator

• Prompt User for Blog Title → When user clicks Blog Article

• Store Blog Prompt → Saves prompt for later use

• Log Blog Prompt to Google Sheets → Writes title + user ID to Google Sheets

• Send Article Style Options → Offers: Formal, Casual, or News style

• Store Selected Article Style → Updates row with chosen style in Google Sheets

• Fetch Last User Prompt → Finds the latest prompt submitted by this user

• Extract Last Blog Prompt → Extracts row for use in AI request

• Gemini Chat Wrapper → Handles input into LangChain node for AI processing

• Generate Article with Gemini → Calls Gemini to create 3-paragraph blog post

• Parse Gemini Response → Parses JSON string to extract title and content

• Send Article to Telegram → Sends blog article result back to user

• Log Final Article to Google Sheets → Updates row with final content and timestamp

Requirements

• Telegram bot (via @BotFather)
• Pollinations API (free and public endpoint)
• Google Sheets & Drive (OAuth credential setup in n8n)
• Google Gemini / PaLM API key via LangChain
• Self-hosted or cloud n8n setup

Setup Instructions

• Clone the workflow and import it into your n8n instance

• Set credentials:

  • Telegram API
  • Google Sheets OAuth
  • Google Drive OAuth
  • Gemini (via LangChain)

• Replace:

  • Sheet ID with your own Google Sheet
  • Folder ID on Google Drive
  • chat_id placeholders if needed (use expressions instead)

• Deploy and send /start in your Telegram bot

🔧 Customization Tips

• Edit the Gemini prompt to adjust article length or tone

• Add extra style buttons like "SEO", "Story", "Academic"

• Add image post-processing (e.g. compression, renaming)

• Add error catching logic (e.g. if Pollinations image fails)

• Store images with filenames based on timestamp/user

Security Considerations

• Use n8n credentials for all tokens (Telegram, Gemini, Sheets, Drive)

• Never hardcode your token inside HTTP nodes

• Do not expose real Google Sheet or Drive links in shared version

• Use Set node to collect all editable variables (like folder ID, sheet name)