API reference

Submit a Fal.ai task

Universal submission interface, path format POST /fal-ai/{model}. The request body is different for different models.

POST/fal-ai/*model

Body Parametersapplication/json

guidance_scale number

Guidance scale

image_size string

Output size, such as square_hd, landscape_4_3

num_images integer

Number of images to generate

num_inference_steps integer

Number of inference steps

prompt* string

Text prompt words (commonly used by image/video models)

seed integer

Random seed; same seed makes results reproducible

200 OK application/json

response-200 object

400 Bad request or validation failed application/json

response-400 object

properties

error* object

401 Missing or invalid API Key application/json

response-401 object

Request Body Example FLUX-1 Dev

2"guidance_scale": 3.5,

3"image_size": "landscape_4_3",

4"num_inference_steps": 28,

5"prompt": "A serene mountain landscape"

Code Sample cURL

1curl -X POST "https://api.digislash.com/fal-ai/*model" \

2-H "Authorization: Bearer <API Key>" \

3-H "Content-Type: application/json" \

4-d '{

5"guidance_scale": 3.5,

6"image_size": "landscape_4_3",

7"num_inference_steps": 28,

8"prompt": "A serene mountain landscape"

9}'

Response

1▼{

2"request_id": "req_example",

3"status": "OK"