FLUX.1 Dev ControlNet LoRA API reference

Call FLUX.1 Dev ControlNet LoRA from your own code with one PopNow API key. Below are the exact model IDs to send, every input field the model accepts, what each request costs in credits, and a request you can paste into a terminal.

At a glance

Made by: Black Forest Labs
Output: Image
From: 5.4 credits per image ($0.054)
Model IDs: black-forest-labs/flux-1-dev-controlnet-lora/text-to-image

1 credit = $0.01. A task holds the highest possible charge when it is accepted and settles the real amount when it finishes, rounded up to whole credits; failed tasks are not charged. Ask POST /api/v1/jobs/quote for the exact figure before you run.

Create Image

black-forest-labs/flux-1-dev-controlnet-lora/text-to-image

Price

Option	Credits (per image)	US dollars
`Default`	5.4	$0.054

Parameters

Field	Type	Default	Allowed	What it does
`prompt`Required	`string`	—	up to 5,000 characters	Describe the picture you want: subject, clothing, setting and light. The control image only sets the layout.
`control_image_url`Required	`string (uri)`	—	—	Control image: a pose skeleton, depth map, canny or soft-edge line map, or a grayscale or plain photo. The result keeps its aspect ratio.
`control_strength`Optional	`number`	`0.7`	0 to 1	How strongly the result follows the control image, from 0 to 1.
`control_guidance_start`Optional	`number`	`0`	0 to 1	Fraction of the denoising steps at which the control image starts to apply, from 0 to 1.
`control_guidance_end`Optional	`number`	`0.8`	0 to 1	Fraction of the denoising steps at which the control image stops applying, from 0 to 1; not before the start.
`resolution`Optional	`string`	`1k`	1k, 1.5k	Length of the output's long side: 1k is 1024 pixels, 1.5k is 1536. The control image's aspect ratio is kept.
`num_outputs`Optional	`integer`	`1`	1 to 4	How many images to generate in one run, from 1 to 4.
`loras`Optional	`array<object>`	`[]`	up to 3 items	Up to three LoRA weight files trained for FLUX.1 dev, each with its own strength.
`guidance_scale`Optional	`number`	`3.5`	0 to 20	How closely the image follows the prompt, from 0 to 20.
`steps`Optional	`integer`	`28`	1 to 50	Denoising steps, from 1 to 50. Fewer steps return faster and a little softer.
`output_format`Optional	`string`	`jpeg`	jpeg, png, webp	Container of the returned image.
`seed`Optional	`integer`	—	0 to 2147483647	Random seed for controlled comparisons.

Example request

This request runs as it is; any field you leave out uses its default. Put your key in POPNOW_API_KEY first.

The example uses PopNow sample files in control_image_url. Replace them with your own public HTTPS links, uploads or saved assets.

POST /api/v1/jobs/createTask

curl -X POST "https://api.popnow.ai/api/v1/jobs/createTask" \
  -H "Authorization: Bearer $POPNOW_API_KEY" \
  -H "Content-Type: application/json" \
  -H "Idempotency-Key: $(uuidgen)" \
  -d '{
  "model": "black-forest-labs/flux-1-dev-controlnet-lora/text-to-image",
  "input": {
    "prompt": "A cozy reading nook beside a rain-streaked window, warm lamp light, a sleeping orange cat on a knitted blanket, soft film grain",
    "control_image_url": "https://media.popnow.ai/influencer/examples/marco.webp",
    "num_outputs": 1
  }
}'

The response carries a taskId straight away. Read the result with GET /api/v1/jobs/recordInfo, or add callBackUrl to be notified.

GET /api/v1/jobs/recordInfo

curl "https://api.popnow.ai/api/v1/jobs/recordInfo?taskId=TASK_ID_FROM_CREATE_TASK" \
  -H "Authorization: Bearer $POPNOW_API_KEY"