Flux Vision Upscaler

POST/v1/run

Flux Vision Upscaler by BFL - AI-powered image editing, style transfer, and transformation. Edit photos with natural language instructions, remove backgrounds, change styles, and enhance images effortlessly.

Request body

Submit an async generation request. The model field selects the model; other fields are model-specific input parameters.

stringmodelrequired

Model identifier. Set to bfl/flux-vision-upscaler.

Default: bfl/flux-vision-upscaler

stringimagerequired

The URL of the image to upscale.

Optional<number>upscale_factor

The upscale factor (1-4x).

Range: 1 to 4

Default: 2

Optional<integer>steps

Number of inference steps (4-50).

Range: 4 to 50

Default: 20

Optional<number>creativity

The creativity of the model. The higher the creativity, the more the model will deviate from the original. Refers to the denoise strength of the sampling.

Range: 0 to 1

Default: 0.3

Optional<number>guidance

CFG/guidance scale (1-4). Controls how closely the model follows the prompt.

Range: 1 to 4

Default: 1

Optional<integer>seed

The seed to use for the upscale. If not provided, a random seed will be used.

Response Schema

The submit endpoint returns a run response. If its status is pending or running, poll GET /v1/run/{id} with the returned opaque ID until it reaches a terminal state.

stringidrequired

Opaque SandBase run identifier. Use it exactly as returned; no prefix is guaranteed.

stringstatusrequired

Current public run status.

Allowed values: pending, running, completed, failed, timeout

Optional<string>model

Public SandBase model name used for this run.

Optional<array<object>>outputs

Present only for completed runs. Each object is capability-specific; inspect the selected model schema for its fields.

Optional<object>error

Present only for failed or timeout runs. Contains a public error type and sanitized message.

Optional<string>error.type

Stable public error category.

Optional<string>error.message

Sanitized error message safe to show to clients.

Optional<object>usage

Usage details when available.

Model capabilities

array<string>capability_tagsrequired

Capabilities declared by the model registry.

Default: image-to-image

stringexecution_moderequired

Execution mode declared by the model registry.

Default: async

# 1. Submit a generation request
curl -X POST https://api.sandbase.ai/v1/run \
  -H "Authorization: Bearer $SANDBASE_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "model": "bfl/flux-vision-upscaler",
  "image": "https://static.sandbase.ai/examples/bfl/flux-vision-upscaler/input_image_0.jpg"
}'

# 2. If the response is still running, poll the returned id
curl https://api.sandbase.ai/v1/run/f3d2e8a1-7c4b-4a12-9d2e-123456789abc \
  -H "Authorization: Bearer $SANDBASE_API_KEY"

Response202 Accepted

{
  "id": "f3d2e8a1-7c4b-4a12-9d2e-123456789abc",
  "model": "bfl/flux-vision-upscaler",
  "status": "running"
}