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POST
Submit Flux Schnell Task
  1. After submission, a task_id will be returned. If you provided a callback_url, when the task status becomes finished or failed, a POST request will be sent to the callback_url.
  2. Regardless of whether callback_url is provided, you can retrieve the response result through the unified Query Task Status endpoint.

Flux Schnell Image Generation

Generate images with flux-schnell from a prompt. Use input.size for output size, input.n for output image count, and input.output_format for the returned image format. Supported size values are 1:1, 1:1 HD, 4:3, 3:4, 16:9, and 9:16; 1:1 HD is the high-definition square option. Custom WIDTHxHEIGHT values such as 1024x1536 are also supported. Billing is based on output image size and output image count.

Available Models

  • flux-schnell - Fast text-to-image generation

Authorizations

Authorization
string
header
required

All API endpoints require Bearer Token authentication

Get your API Key:

Visit the API Key Management Page to get your API Key

Add it to the request header:

Body

application/json
model
enum<string>
required

Flux Schnell model identifier

Available options:
flux-schnell
input
object
required

Input parameters for text-to-image generation.

callback_url
string<uri>

Webhook callback URL for result notifications

Example:

"https://your-domain.com/callback"

Response

200 - application/json

Task submitted successfully

code
integer
required

HTTP status code

Example:

200

data
object
required