Nano Banana Pro

Professional version with up to 4K resolution and extended reference image support

Endpoints

Method	Endpoint	Description
POST	`/api/v1/generateTask/nano-banana-pro`	Create generation task
GET	`/api/v1/statusTask/nano-banana-pro`	Query task status

Authentication

All requests require an API Key in the header:

Authorization: Bearer YOUR_API_KEY

Request Body

{
  "request_type": "async",
  "callback_url": "https://...",
  "provider": "auto",
  "input": {
    "mode": "text-to-image",
    "prompt": "...",
    "aspect_ratio": "16:9",
    "resolution": "2K",
    "image_urls": ["..."],
    "output_format": "png"
  }
}

Parameters

Parameter

Required

Default

Description

request_typestring

—

async

async (polling) or callback (webhook)

callback_urlstring

✱

—

Callback URL, required when request_type=callback

providerstring

—

auto

Routing strategy: auto, value, or official

inputobject

✓

—

Model input parameters

Mode Options:

text-to-image — Generate from text description
image-to-image — Generate with reference images

Example

Text-to-Image

curl -X POST "https://api.apixo.ai/api/v1/generateTask/nano-banana-pro" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "request_type": "async",
    "provider": "value",
    "input": {
      "mode": "text-to-image",
      "prompt": "a cozy cyberpunk cafe with neon lights, ultra detailed",
      "aspect_ratio": "3:2",
      "resolution": "2K",
      "output_format": "png"
    }
  }'

Image-to-Image (Multiple References)

curl -X POST "https://api.apixo.ai/api/v1/generateTask/nano-banana-pro" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "request_type": "callback",
    "callback_url": "https://your-server.com/callback",
    "provider": "official",
    "input": {
      "mode": "image-to-image",
      "prompt": "combine these styles into a futuristic cityscape",
      "aspect_ratio": "16:9",
      "resolution": "4K",
      "image_urls": [
        "https://example.com/ref1.jpg",
        "https://example.com/ref2.jpg",
        "https://example.com/ref3.jpg"
      ],
      "output_format": "jpeg"
    }
  }'

Response

POST /api/v1/generateTask/nano-banana-pro

Returns taskId on success for subsequent status queries.

Success:

{
  "code": 200,
  "message": "success",
  "data": {
    "taskId": "task_12345678"
  }
}

Error:

{
  "code": 400,
  "message": "Insufficient credits",
  "data": null
}

GET /api/v1/statusTask/nano-banana-pro

Query task execution status and results via taskId.

curl -X GET "https://api.apixo.ai/api/v1/statusTask/nano-banana-pro?taskId=task_12345678" \
  -H "Authorization: Bearer YOUR_API_KEY"

Success:

{
  "code": 200,
  "message": "success",
  "data": {
    "taskId": "task_12345678",
    "state": "success",
    "resultJson": "{\"resultUrls\":[\"https://r2.apixo.ai/image.png\"]}",
    "createTime": 1767965610929,
    "completeTime": 1767965652317,
    "costTime": 41388
  }
}

Failed:

{
  "code": 200,
  "message": "success",
  "data": {
    "taskId": "task_12345678",
    "state": "failed",
    "failCode": "CONTENT_VIOLATION",
    "failMsg": "Content does not meet safety guidelines"
  }
}

Status Response Fields

Field	Type	Description
`taskId`	string	Unique task identifier
`state`	string	`pending` `processing` `success` `failed`
`resultJson`	string	JSON containing `resultUrls` array (on success)
`failCode`	string	Error code (on failure)
`failMsg`	string	Error message (on failure)
`createTime`	integer	Task creation timestamp (ms)
`completeTime`	integer	Task completion timestamp (ms)
`costTime`	integer	Processing duration (ms)

Error Codes

Code	Description
400	Invalid parameters or request error
401	Invalid or missing API Key
429	Rate limit exceeded

Fail Code	Description
`CONTENT_VIOLATION`	Content violates safety guidelines
`INVALID_IMAGE_URL`	Cannot access provided image URL

Rate Limits

Limit	Value
Requests	10000 / minute
Concurrent tasks	1000

Exceeding limits returns 429 error. Wait and retry.

Tips

Generation time:
- 1K resolution: ~20-30 seconds
- 2K resolution: ~30-45 seconds
- 4K resolution: ~45-60 seconds
- Submit task, wait 20 seconds, then poll every 3 seconds
Pro advantages:
- Up to 4K resolution output
- Up to 10 reference images
- Richer details, higher quality
Callback mode: For high-concurrency or high-resolution generation, use callback mode.
Image expiration: Result URLs are valid for 15 days. Download and store important outputs promptly.
Content moderation: Prompts must comply with content safety guidelines. Violations return CONTENT_VIOLATION.
Resolution selection:
- 1K: Fast generation, for previews and social media
- 2K: Balanced quality and speed, for most scenarios
- 4K: Highest quality, for printing and professional use
Aspect ratio selection:
- 1:1: Square, for avatars
- 16:9: Landscape, for desktop wallpapers
- 9:16: Portrait, for mobile wallpapers
- 21:9: Ultra-wide, for banner ads
Format selection:
- png: Lossless, supports transparency, larger file (default)
- jpeg: Lossy compression, smaller file; use for 4K to reduce file size
Multiple reference fusion:
- Supports up to 10 reference images
- Model intelligently combines style, composition, and color
- More references = more complex fusion
- 2-5 references recommended for best results
Image formats: image_urls supports JPG, PNG, WebP, max 10MB per image.
Prompt tips: For high-resolution output, add "ultra detailed", "high quality" to prompts for better details.

Nano Banana Pro

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