Nano Banana Skill

Nano Banana Skill

Nano Banana is Google's cutting-edge AI image generation model series designed for AI agents. Part of the Monet AI unified API platform.

When to Use

Use this skill when:

• Character Consistent Image Series: Create images with consistent characters using reference images
  • nano-banana-1: Up to 5 reference images for character consistency
  • nano-banana-1-pro: Up to 14 reference images with 1K-4K resolution
  • nano-banana-2: Latest Gemini model with extreme aspect ratio support
• High-Resolution Output: Generate professional-grade images with 1K, 2K, or 4K resolution
• Ultra-Wide Formats: Create panoramic images with extreme aspect ratios (21:9, 8:1)
• Style Transfer: Use multiple reference images to guide style and character

Getting API Key

1. Visit https://monet.vision to register an account
2. After login, go to https://monet.vision/skills/keys to create an API Key
3. Configure the API Key in environment variables or code

If you don't have an API Key, ask your owner to apply at monet.vision.

Quick Start

Create an Image Generation Task

curl -X POST https://monet.vision/api/v1/tasks/async \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer $MONET_API_KEY" \
  -d '{
    "type": "image",
    "input": {
      "model": "nano-banana-1",
      "prompt": "A cute cat in a garden",
      "aspect_ratio": "16:9"
    },
    "idempotency_key": "unique-key-123"
  }'

⚠️ Important: idempotency_key is required. Use a unique value (e.g., UUID) to prevent duplicate task creation if the request is retried.

Response:

{
  "id": "task_abc123",
  "status": "pending",
  "type": "image",
  "created_at": "2026-02-27T10:00:00Z"
}

Get Task Status and Result

Task processing is asynchronous. You need to poll the task status until it becomes success or failed. Recommended polling interval: 5 seconds.

curl https://monet.vision/api/v1/tasks/task_abc123 \
  -H "Authorization: Bearer $MONET_API_KEY"

Response when completed:

{
  "id": "task_abc123",
  "status": "success",
  "type": "image",
  "outputs": [
    {
      "model": "nano-banana-1",
      "status": "success",
      "progress": 100,
      "url": "https://files.monet.vision/..."
    }
  ],
  "created_at": "2026-02-27T10:00:00Z",
  "updated_at": "2026-02-27T10:01:30Z"
}

Example: Poll until completion

const TASK_ID = "task_abc123";
const MONET_API_KEY = process.env.MONET_API_KEY;

async function pollTask() {
  while (true) {
    const response = await fetch(
      `https://monet.vision/api/v1/tasks/${TASK_ID}`,
      {
        headers: {
          Authorization: `Bearer ${MONET_API_KEY}`,
        },
      },
    );

    const data = await response.json();
    const status = data.status;

    if (status === "success") {
      console.log("Task completed successfully!");
      console.log(JSON.stringify(data, null, 2));
      break;
    } else if (status === "failed") {
      console.log("Task failed!");
      console.log(JSON.stringify(data, null, 2));
      break;
    } else {
      console.log(`Task status: ${status}, waiting...`);
      await new Promise((resolve) => setTimeout(resolve, 5000));
    }
  }
}

pollTask();

Supported Models

nano-banana-1

nano-banana-1 - Google Nano Banana

Ultra-high character consistency

• 🎯 Use Cases: Image series requiring consistent character appearance
• 📐 Max Reference Images: 5

{
  model: "nano-banana-1",
  prompt: string,                // Required
  images?: string[],             // Optional: Up to 5 reference images
  aspect_ratio?: "1:1" | "2:3" | "3:2" | "4:3" | "3:4" | "16:9" | "9:16"
}

nano-banana-1-pro

nano-banana-1-pro - Nano Banana Pro

Google flagship generation model

• 🎯 Use Cases: Professional-grade high-quality image generation
• 📐 Max Reference Images: 14
• 🖥️ Resolution: 1K, 2K, 4K

{
  model: "nano-banana-1-pro",
  prompt: string,                // Required
  images?: string[],             // Optional: Up to 14 reference images
  aspect_ratio?: "1:1" | "2:3" | "3:2" | "4:3" | "3:4" | "4:5" | "5:4" | "16:9" | "9:16" | "21:9",
  resolution?: "1K" | "2K" | "4K"
}

nano-banana-2

nano-banana-2 - Nano Banana 2

Google Gemini latest model

• 🎯 Use Cases: Latest technology for high-quality image generation
• 📐 Max Reference Images: 14
• 🖥️ Resolution: 1K, 2K, 4K
• 🌍 Special: Ultra-wide aspect ratios including 8:1

{
  model: "nano-banana-2",
  prompt: string,                // Required
  images?: string[],             // Optional: Up to 14 reference images
  aspect_ratio?: "1:1" | "2:3" | "3:2" | "4:3" | "3:4" | "4:5" | "5:4" | "16:9" | "9:16" | "21:9" | "4:1" | "1:4" | "8:1" | "1:8",
  resolution?: "1K" | "2K" | "4K"
}

API Reference

Create Task (Async)

POST /api/v1/tasks/async - Create an async task. Returns immediately with task ID.

Request:

curl -X POST https://monet.vision/api/v1/tasks/async \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer $MONET_API_KEY" \
  -d '{
    "type": "image",
    "input": {
      "model": "nano-banana-1",
      "prompt": "A cute cat"
    },
    "idempotency_key": "unique-key-123"
  }'

⚠️ Important: idempotency_key is required. Use a unique value (e.g., UUID) to prevent duplicate task creation if the request is retried.

Response:

{
  "id": "task_abc123",
  "status": "pending",
  "type": "image",
  "created_at": "2026-02-27T10:00:00Z"
}

Create Task (Streaming)

POST /api/v1/tasks/sync - Create a task with SSE streaming. Waits for completion and streams progress.

Request:

curl -X POST https://monet.vision/api/v1/tasks/sync \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer $MONET_API_KEY" \
  -N \
  -d '{
    "type": "image",
    "input": {
      "model": "nano-banana-1",
      "prompt": "A cute cat"
    },
    "idempotency_key": "unique-key-123"
  }'

Get Task

GET /api/v1/tasks/{taskId} - Get task status and result.

Request:

curl https://monet.vision/api/v1/tasks/task_abc123 \
  -H "Authorization: Bearer $MONET_API_KEY"

Response:

{
  "id": "task_abc123",
  "status": "success",
  "type": "image",
  "outputs": [
    {
      "model": "nano-banana-1",
      "status": "success",
      "progress": 100,
      "url": "https://files.monet.vision/..."
    }
  ],
  "created_at": "2026-02-27T10:00:00Z",
  "updated_at": "2026-02-27T10:01:30Z"
}

List Tasks

GET /api/v1/tasks/list - List tasks with pagination.

Request:

curl "https://monet.vision/api/v1/tasks/list?page=1&pageSize=20" \
  -H "Authorization: Bearer $MONET_API_KEY"

Response:

{
  "tasks": [
    {
      "id": "task_abc123",
      "status": "success",
      "type": "image",
      "outputs": [
        {
          "model": "nano-banana-1",
          "status": "success",
          "progress": 100,
          "url": "https://files.monet.vision/..."
        }
      ],
      "created_at": "2026-02-27T10:00:00Z",
      "updated_at": "2026-02-27T10:01:30Z"
    }
  ],
  "page": 1,
  "pageSize": 20,
  "total": 100
}

Upload File

POST /api/v1/files - Upload a file to get an online access URL.

📁 File Storage: Uploaded files are stored for 24 hours and will be automatically deleted after expiration.

Request:

curl -X POST https://monet.vision/api/v1/files \
  -H "Authorization: Bearer $MONET_API_KEY" \
  -F "file=@/path/to/your/image.jpg" \
  -v

Response:

{
  "id": "file_xyz789",
  "url": "...",
  "filename": "image.jpg",
  "size": 1048576,
  "content_type": "image/jpeg",
  "created_at": "2026-02-27T10:00:00Z"
}

Configuration

Environment Variables

export MONET_API_KEY="monet_xxx"

Authentication

All API requests require authentication via the Authorization header:

Authorization: Bearer monet_xxx