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Endpoints

MethodEndpointDescription
POST/api/v1/generateTask/nano-bananaCreate generation task
GET/api/v1/statusTask/nano-bananaQuery task status

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Authentication

All requests require an API Key in the header: 
Authorization: Bearer YOUR_API_KEY

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Request Body

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

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Parameters

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request_type
string
default:"async"
async (polling) or callback (webhook)
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callback_url
string
Callback URL, required when request_type=callback (conditional)
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provider
string
default:"auto"
Routing strategy: auto, value, or official
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input
object
required
Model input parameters
Mode Options:
  • text-to-image — Generate from text description
  • image-to-image — Generate with reference images

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Example

Text-to-Image 
curl -X POST "https://api.apixo.ai/api/v1/generateTask/nano-banana" \
  -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",
      "aspect_ratio": "3:2",
      "output_format": "png"
    }
  }'
Image-to-Image 
curl -X POST "https://api.apixo.ai/api/v1/generateTask/nano-banana" \
  -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": "make this scene look like sunrise with warm golden light",
      "aspect_ratio": "4:5",
      "image_urls": ["https://example.com/ref1.jpg"],
      "output_format": "jpeg"
    }
  }'

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Response

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POST /api/v1/generateTask/nano-banana

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
}

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GET /api/v1/statusTask/nano-banana

Query task execution status and results via taskId. 
curl -X GET "https://api.apixo.ai/api/v1/statusTask/nano-banana?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"
  }
}

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Status Response Fields

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taskId
string
Unique task identifier.
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state
string
Current task state: pending, processing, success, or failed.
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resultJson
string
JSON string containing resultUrls array. Only present on success. Parse with JSON.parse().
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failCode
string
Error code. Only present when state is failed. See Error Codes.
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failMsg
string
Human-readable error message. Only present when state is failed.
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createTime
integer
Task creation timestamp (Unix milliseconds).
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completeTime
integer
Task completion timestamp (Unix milliseconds).
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costTime
integer
Processing duration in milliseconds.

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Error Codes

CodeDescription
400Invalid parameters or request error
401Invalid or missing API Key
429Rate limit exceeded
Fail CodeDescription
CONTENT_VIOLATIONContent violates safety guidelines
INVALID_IMAGE_URLCannot access provided image URL

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Rate Limits

LimitValue
Requests10000 / minute
Concurrent tasks1000
Exceeding limits returns 429 error. Wait and retry.

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Tips

  • Generation time: Average ~15-20 seconds. Submit task, wait 10 seconds, then poll every 3 seconds.
  • Fast and affordable: Nano Banana excels at speed and cost-effectiveness, ideal for rapid prototyping and batch generation.
  • Callback mode: For high-concurrency scenarios, use callback mode to avoid frequent polling.
  • 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.
  • Aspect ratio selection:
    • 1:1: Square, for avatars and social media
    • 3:2/4:3: Landscape, for traditional photos
    • 2:3/3:4: Portrait, for mobile screens
    • 16:9/21:9: Ultra-wide, for banners and backgrounds
    • auto: Automatically select best ratio
  • Format selection:
    • png: Lossless, supports transparency, larger file size (default)
    • jpeg: Lossy compression, smaller file, good for fast transfer
  • Multiple references: image-to-image mode supports up to 5 reference images, model combines all styles and content.
  • Image formats: image_urls supports JPG, PNG, WebP, max 10MB per image.
Result URLs expire after 15 days. Download and store important outputs promptly. For high-concurrency scenarios, use callback mode to avoid frequent polling.