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POST
https://toapis.com
/
v1
/
images
/
generations
curl --request POST \
  --url https://toapis.com/v1/images/generations \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '{
    "model": "gemini-3-pro-image-preview",
    "prompt": "Futuristic city skyline with neon lights",
    "size": "16:9",
    "n": 1,
    "resolution": "1K"
  }'

{
  "id": "task_img_abc123def456",
  "object": "generation.task",
  "model": "gemini-3-pro-image-preview",
  "status": "queued",
  "progress": 0,
  "created_at": 1703884800,
  "metadata": {}
}
  • Google Gemini 3 Pro powerful image generation model (Nano banana2)
  • Use model parameter to select gemini-3-pro-image-preview model
  • Supports text-to-image generation
  • Async task management, query results by task ID

​
Authorizations

​
Authorization
string
required
All endpoints require Bearer Token authenticationGet your API Key from the API Key Management PageAdd to request header:
Authorization: Bearer YOUR_API_KEY

​
Body

​
model
string
default:"gemini-3-pro-image-preview"
required
Image generation model nameModel alias: nano-banana-proExample: "gemini-3-pro-image-preview"
​
prompt
string
required
Text description for image generationMaximum 1000 characters
​
size
string
Image generation aspect ratioSupported formats:
  • Ratios: 1:1, 2:3, 3:2, 3:4, 4:3, 4:5, 5:4, 9:16, 16:9, 21:9
​
n
integer
default:1
Number of images to generateFixed at 1⚠️ Note: Must be a pure number (e.g. 1), do not add quotes, otherwise it will error
​
resolution
string
default:"1K"
Output image resolutionSupported values:
  • 1K - 1K resolution (default)
  • 2K - 2K resolution
  • 4K - 4K resolution
⚠️ Note: Generating 4K images with base64 format takes longer processing time
​
image_urls
object[]
List of reference image URLs for image-to-image or image editing💡 Quick Fill (Try it area):
  1. Click ”+ Add an item” to add an image URL
  2. Enter the complete image URL address or base64 data
Limit: Maximum 14 images
​
mask_url
string
Mask image URL
  • Must be PNG format
  • Size must match reference image
  • Must not exceed 4MB

​
Response

​
id
string
Unique task identifier for status queries
​
object
string
Object type, always generation.task
​
model
string
Model name used
​
status
string
Task status
  • queued - Queued for processing
  • in_progress - Processing
  • completed - Successfully completed
  • failed - Failed
​
progress
integer
Task progress percentage (0-100)
​
created_at
integer
Task creation timestamp (Unix timestamp)
​
metadata
object
Task metadata
curl --request POST \
  --url https://toapis.com/v1/images/generations \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '{
    "model": "gemini-3-pro-image-preview",
    "prompt": "Futuristic city skyline with neon lights",
    "size": "16:9",
    "n": 1,
    "resolution": "1K"
  }'

{
  "id": "task_img_abc123def456",
  "object": "generation.task",
  "model": "gemini-3-pro-image-preview",
  "status": "queued",
  "progress": 0,
  "created_at": 1703884800,
  "metadata": {}
}