Nano Banana MCP Server

Compose new images using multiple reference images with Nano Banana Pro.

Use up to 14 reference images to:

• Create group compositions

• Transfer styles between images

• Maintain character consistency across scenes

• Combine objects from different images

Limits:

• Up to 6 images of objects for high-fidelity inclusion

• Up to 5 images of humans for character consistency

• Total maximum: 14 images

Args:

• prompt (string, required): Description of how to compose the images

• images (array, required): Array of image objects with:

  • base64 (string): Base64-encoded image data

  • mime_type (string): Image MIME type

• model (string): Must be Nano Banana Pro (gemini-3-pro-image-preview)

• aspect_ratio (string): Output aspect ratio

• resolution (string): Output resolution (1K, 2K, 4K)

Returns:

• success (boolean): Whether composition succeeded

• imageData (string): Base64-encoded composed image

• mimeType (string): Image MIME type

• text (string): Any accompanying text

• error (string): Error message if failed

Examples:

• "Create a group photo of these 5 people at a beach"

• "Apply the style of the first image to the subject in the second"

• "Combine these product images into a catalog layout"