Nano Banana
Enables image generation using Google Gemini models like Gemini 2.0 Flash and Imagen 3.0 with support for custom aspect ratios and negative prompts. It also allows users to list and manage generated images stored in local directories.
README
@saroby/nanobanana-mcp
Google Gemini image generation MCP server (Nano Banana).
Features
- generate_image - Generate images using Google Gemini models
flashmode: gemini-2.0-flash-exp (fast, ~2-3s)promode: imagen-3.0-generate-002 (high quality, ~5-8s)
- list_images - List generated images in a directory
Setup
Get API Key
- Go to Google AI Studio
- Create an API key
Install in Claude Code
claude mcp add nanobanana -e GEMINI_API_KEY=your-key-here -- npx -y @saroby/nanobanana-mcp
Manual Usage
GEMINI_API_KEY=your-key-here npx @saroby/nanobanana-mcp
Tools
generate_image
| Parameter | Type | Required | Description |
|---|---|---|---|
prompt |
string | Yes | Image description (1-8192 chars) |
model |
"flash" | "pro" |
No | Model selection (default: flash) |
aspect_ratio |
enum | No | 1:1, 16:9, 9:16, 4:3, 3:4 |
negative_prompt |
string | No | Elements to exclude |
output_dir |
string | No | Save directory (default: ./nanobanana-images) |
count |
number | No | Number of images 1-4 (default: 1) |
list_images
| Parameter | Type | Required | Description |
|---|---|---|---|
directory |
string | No | Directory to search (default: ./nanobanana-images) |
Development
npm install
npm run build
npm run dev # watch mode
License
MIT
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