Gemini Nano Banana

OneKey Gateway

Use One Access Key to connect to various commercial APIs. Please visit the OneKey Gateway Keys and read the docs OneKey MCP Router Doc and OneKey Gateway Doc.

gemini Skill

Use the OneKey Gateway to access tools for this server via a unified access key.

Quick Start

Set your OneKey access key:

export DEEPNLP_ONEKEY_ROUTER_ACCESS=YOUR_API_KEY

Common settings:

• unique_id: gemini/gemini
• api_id: one of the tools listed below

Tools

generate_image_gemini

Generates an image using the Gemini Image API. Supported Models (aliases are internal): The model parameter allows selection between available image generation models. - "gemini-2.5-flash-image" (recommended default for stable, fast response). - "gemini-3-pro-image-preview". - "gemini-3-flash"

        Aliases for these models are 'nano-banana 2.5' and 'nano-banana 3 Pro' respectively.
        Please use 'gemini-2.5-flash-image' unless the user specifically requests the Gemini 3 model.

    Args:
        model: The image generation model to use (see supported models above). Defaults to "gemini-2.5-flash-image". Supports: 'gemini-3-flash', 'gemini-3-pro-image-preview', 'gemini-2.5-flash-image'
        prompt: A detailed text description for the image to be generated.
        image_name: The filename for the output image, can be a relative path. Defaults to "gemini_output_images.png".
        output_folder: The optional absolute folder path provided by the user where the image will be saved. Do not use default server locations.
        aspect_ratio: The aspect ratio of the generated image (e.g., '16:9', '1:1', '4:3'). Defaults to '16:9'.
        image_size: The size/resolution of the generated image (e.g., '1K', '2K', '4K'). Defaults to '1K'.

    Return:
        Dict: Result dictionary containing image path, message, and success status.
        output_result["image_path"]: str
        output_result["image_url"]: str
        output_result["message"]: str
        output_result["success"]: bool

Parameters:

• model (string, optional):
• prompt (string, optional):
• image_name (string, optional):
• output_folder (object, optional):
• aspect_ratio (string, optional):
• image_size (string, optional):

generate_image_nano_banana

Generate Image With Nano Banana

    Args:
        model: The image generation model to use. Defaults to "gemini-2.5-flash-image". Supported Models such as follows Google Gemini Doc, such as 'gemini-3-flash', "gemini-3-pro-image-preview", "gemini-2.5-flash-image", note that nano-banana is the alias name of the Gemini Image Model. Nano banana 3 Pro refers to Gemini 3 pro preview, and Nono Banana 2.5 refers to Gemini 2.5. Unless specified by user to use Gemini 3 model preview, general 'Neno Banana' image models, please use 'gemini-2.5-flash-image' for more stable and fast response.
        prompt: A detailed text description for the image to be generated.
        image_name: The filename for the output image, can be a relative path, such as "./new_gemini_image.png", etc. Defaults to "gemini_output_images.png".
        output_folder: The optional absolute folder path provided by the user where the image will be saved. Do not use default server locations.
        aspect_ratio: The aspect ratio of the generated image (e.g., '16:9', '1:1', '4:3'), defaults to '16:9'.
        image_size: The size/resolution of the generated image (e.g., '1K', '2K', '4K'), defaults to '1K'.

    Return:
        Dict:  output_result is the result dict of MCP returned
        output_result["image_path"] = full_path: str
        output_result["message"] = output_message: str
        output_result["success"] = success: bool

Parameters:

• model (string, optional):
• prompt (string, optional):
• image_name (string, optional):
• output_folder (object, optional):
• aspect_ratio (string, optional):
• image_size (string, optional):

Usage

CLI

generate_image_gemini

npx onekey agent gemini-nano-banana/gemini-nano-banana generate_image_gemini '{"model": "gemini-2.5-flash-image", "prompt": "sunrise over mountains", "aspect_ratio": "16:9", "image_size": "1K"}'

generate_image_nano_banana

npx onekey agent gemini-nano-banana/gemini-nano-banana generate_image_nano_banana '{"model": "gemini-2.5-flash-image", "prompt": "robot reading book", "aspect_ratio": "16:9", "image_size": "1K"}'

generate_image_nano_banana_with_reference

npx onekey agent gemini-nano-banana/gemini-nano-banana generate_image_nano_banana_with_reference '{"model": "gemini-3-pro-image-preview", "prompt": "winter coat style", "images": ["https://avatars.githubusercontent.com/u/242328252"], "aspect_ratio": "1:1"}'

ocr_extract_text_from_image

npx onekey agent gemini-nano-banana/gemini-nano-banana ocr_extract_text_from_image '{"images": ["https://avatars.githubusercontent.com/u/242328252"], "model": "gemini-3-flash-preview"}'

list_items_from_image

npx onekey agent gemini-nano-banana/gemini-nano-banana list_items_from_image '{"images": ["https://avatars.githubusercontent.com/u/242328252"], "model": "gemini-3-flash-preview", "output_json": true}'

Scripts

Each tool has a dedicated script in this folder:

• skills/gemini/scripts/generate_image_gemini.py
• skills/gemini/scripts/generate_image_nano_banana.py

Example

python3 scripts/<tool_name>.py --data '{"key": "value"}'

Related DeepNLP OneKey Gateway Documents

AI Agent Marketplace
Skills Marketplace AI Agent A2Z Deployment
PH AI Agent A2Z Infra
GitHub AI Agent Marketplace

Dependencies

CLI Dependency

Install onekey-gateway from npm

npm install @aiagenta2z/onekey-gateway

Script Dependency

Install the required Python package before running any scripts.

pip install ai-agent-marketplace

Alternatively, install dependencies from the requirements file:

pip install -r requirements.txt

If the package is already installed, skip installation.

Agent rule

Before executing command lines or running any script in the scripts/ directory, ensure the dependencies are installed. Use the npx onekey CLI as the preferred method to run the skills.