Generate newsletter images with Nano Banana & Post Human-Approved Tweets to X

What this is

A ready-to-use n8n workflow that turns new Google Sheets rows (title + summary) into brand-safe images using Nano Banana (via KIE.ai), writes the image URL back to your sheet, generates a tweet text, requests human approval in Telegram, and—on approval—posts to X (Twitter) automatically.

Why you need it

• Save time: no more waiting for ad-hoc graphics—get on-brand visuals in seconds.
• Stay consistent: one prompt style, predictable output, brand-safe negative prompts.
• Ship daily: scale newsletter/blog distribution without ballooning costs or headcount.
• Human in the loop: you keep creative control before anything goes live.

How it works (high level)

1. New/updated row in Google Sheets (e.g., title, blogpost_summary, status=pending).
2. Prompt builder creates a short, safe image prompt (CI friendly).
3. Nano Banana (KIE.ai) generates the image (PNG) → URL saved back to the sheet.
4. A tweet (<280 chars) is generated from the row.
5. Telegram sends image + text for approval (Approve/Reject).
6. On Approve, the image is uploaded and the tweet is posted to X → tweet_url + status=posted saved to the sheet.

Who it’s for

• Content & marketing teams, solo creators, agencies, and founders running lean editorial calendars.

Extend it (ideas)

• Multi-variant images (A/B) with auto-selection based on CTR.
• Brand controls: fixed color palettes, fonts, or stylistic anchors in prompts.
• Auto-publish to LinkedIn/Instagram (via Buffer/Hootsuite or native APIs).
• Asset storage: push originals to S3/Drive and auto-rename by slug/date.
• Analytics: log posts + clicks to a database and feed learnings back into prompts.

Pricing & Advantage

• Nano Banana (via KIE.ai) is typically ~$0.02–$0.04 per image (plan-dependent).
• Posting to X has no per-post cost (API plan limits may apply).
• Why KIE.ai vs “classic” Google API? Lower practical unit costs for this image-gen use case, simpler integration (same vendor for image + video), and task/status flows that fit n8n polling perfectly.
  > Always check your KIE.ai dashboard for current pricing/limits.

Quick setup (Step-by-Step)

1. Accounts/credentials: create a KIE.ai account & API key; set up Google Sheets access; create a Telegram bot with @BotFather (copy token & get Chat ID); enable X (Twitter) API (OAuth).
2. Import the n8n template and connect credentials (KIE.ai header: Authorization: Bearer {{ $env.KIE_API_KEY }}).
3. Point the Google Sheets Trigger at your sheet/tab; use status=pending as the starting condition.
4. Verify the Prompt Generator (short, brand-safe prompt + negative prompt).
5. Test Image Gen → ensure image_url is written back to the sheet.
6. Test Telegram approval (image + tweet text).
7. On approve, confirm the tweet posts and tweet_url + status update in the sheet.

Quick usage (Step-by-Step)

1. Add a row in your sheet with title, blogpost_summary, (status=pending).
2. Wait for the bot: you’ll get image + tweet text in Telegram.
3. Approve to post to X, or Reject/Regenerate to try a new style.
4. Find tweet_url and status updated in your sheet.

Questions? Email: [email protected]