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n8n-nodes-gen-img-ver-tex-ai
n8n-nodes-gen-img-ver-tex-ai/dist/index.js

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Readme

gen-img-ver-tex-ai 🍌

Custom n8n node for Gemini Vertex AI (aka Nano Banana) via Google Cloud.

Supports:

✅ Text-to-image generation
✅ Single image editing
✅ Multi-image fusion (combine multiple images)
✅ Clean binary image output

Installation

In your self-hosted n8n:

# Go to your n8n custom nodes folder
cd ~/.n8n/custom

# Install the node
npm install gen-img-ver-tex-ai

Then restart n8n.

Or install via Settings → Community Nodes in the n8n UI.

Setup

Add Google Service Account credentials in n8n
Make sure your service account has Vertex AI User role
Enable Vertex AI API in your GCP project

Node Parameters

Parameter	Description
GCP Project ID	Your Google Cloud project ID
Model ID	The ID of the model (default: `gemini-2.5-flash-image-preview`)
Prompt	Text describing what to generate or how to edit
Input Images	Optional: binary fields of images to edit/combine
Output Binary Field	Name of the output binary field (default: `image`)
Output Filename	Filename for the generated image

Usage Examples

Text-to-Image

Leave Input Images empty
Set prompt: "A black cat sitting by a window at sunset, photorealistic"

Edit an Image

Add one image in Input Images pointing to your binary field
Set prompt: "Make this cat wear a wizard hat"

Multi-Image Fusion

Add multiple images in Input Images
Set prompt: "Combine these two products into one marketing photo"

Pricing

Each image costs ~$0.039 (1290 tokens at $30/1M tokens) from your Vertex AI credits.