Nano Banana MCP Server

Generate high-quality images from text descriptions using Google's Nano Banana models.

This tool creates images from natural language prompts. For best results, be descriptive about:

• Subject and composition

• Style (photorealistic, illustration, painting, etc.)

• Lighting and atmosphere

• Colors and mood

• Camera angle and lens (for photorealistic images)

Args:

• prompt (string, required): Text description of the image to generate

• model (string): Model to use. Options:

  • 'gemini-3-pro-image-preview' (Nano Banana Pro) - Best quality, 4K, text rendering

  • 'gemini-2.5-flash-image' (Nano Banana) - Fast generation Default: Nano Banana Pro

• aspect_ratio (string): Image aspect ratio. Options: 1:1, 2:3, 3:2, 3:4, 4:3, 4:5, 5:4, 9:16, 16:9, 21:9

• resolution (string): Image resolution (Pro only). Options: 1K, 2K, 4K

• use_google_search (boolean): Enable real-time information grounding (Pro only)

Returns:

• success (boolean): Whether generation succeeded

• imageData (string): Base64-encoded image data

• mimeType (string): Image MIME type (usually image/png)

• text (string): Any accompanying text from the model

• error (string): Error message if generation failed

Examples:

• "A photorealistic portrait of an astronaut on Mars at sunset"

• "Kawaii-style sticker of a happy corgi with a transparent background"

• "Minimalist logo for 'TechStart' in blue and white, modern sans-serif font"

Error Handling:

• Returns error if GEMINI_API_KEY is not set

• Returns error if API rate limit exceeded (try again later)

• Returns error if content policy violated