FLUX.1 Dev LoRA API reference
Classic FLUX.1 Dev with up to three of your LoRAs
Call FLUX.1 Dev 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
- 2.7 credits per image ($0.027)
- Typical time
- about 15 s
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-lora/text-to-image
Price
| Option | Credits (per image) | US dollars |
|---|---|---|
Default | 2.7 | $0.027 |
Parameters
| Field | Type | Default | Allowed | What it does |
|---|---|---|---|---|
promptRequired | string | — | up to 5,000 characters | Describe the subject, composition and lighting. If a LoRA has a trigger word, put it first. |
aspect_ratioOptional | string | 1:1 | 1:1, 16:9, 9:16, 4:3, 3:4, 3:2, 2:3, 21:9, 9:21 | Output aspect ratio. |
lorasOptional | array<object> | [] | up to 3 items | Up to three LoRA weight files, each with its own strength. |
guidance_scaleOptional | number | 3.5 | 0 to 20 | How closely the image follows the prompt, from 0 to 20. |
stepsOptional | integer | 28 | 1 to 50 | Denoising steps, from 1 to 50. Fewer steps return faster and a little softer. |
output_formatOptional | string | jpeg | jpeg, png, webp | Container of the returned image. |
seedOptional | 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.
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-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"
}
}'The response carries a taskId straight away. Read the result with GET /api/v1/jobs/recordInfo, or add callBackUrl to be notified.
curl "https://api.popnow.ai/api/v1/jobs/recordInfo?taskId=TASK_ID_FROM_CREATE_TASK" \
-H "Authorization: Bearer $POPNOW_API_KEY"Edit Image
black-forest-labs/flux-1-dev-lora/edit
Price
| Option | Credits (per image) | US dollars |
|---|---|---|
Default | 2.7 | $0.027 |
Parameters
| Field | Type | Default | Allowed | What it does |
|---|---|---|---|---|
promptRequired | string | — | up to 5,000 characters | Describe the whole image you want back; with a mask, describe what belongs in the white area. |
image_urlRequired | string (uri) | — | — | Source image to edit. The result keeps its shape. |
mask_urlOptional | string (uri) | — | — | Optional black-and-white mask the size of the source: white areas are redrawn, black areas are kept. |
strengthOptional | number | 0.8 | 0 to 1 | How far to move away from the source, from 0 to 1. |
lorasOptional | array<object> | [] | up to 3 items | Up to three LoRA weight files, each with its own strength. |
guidance_scaleOptional | number | 3.5 | 0 to 20 | How closely the image follows the prompt, from 0 to 20. |
stepsOptional | integer | 28 | 1 to 50 | Denoising steps, from 1 to 50. Fewer steps return faster and a little softer. |
output_formatOptional | string | jpeg | jpeg, png, webp | Container of the returned image. |
seedOptional | 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 image_url. Replace them with your own public HTTPS links, uploads or saved assets.
curl -X POST "https://api.popnow.ai/api/v1/jobs/createTask?wait=60" \
-H "Authorization: Bearer $POPNOW_API_KEY" \
-H "Content-Type: application/json" \
-H "Idempotency-Key: $(uuidgen)" \
-d '{
"model": "black-forest-labs/flux-1-dev-lora/edit",
"input": {
"prompt": "Change the orange jacket to deep forest green and add soft golden-hour light; keep the face, pose and background unchanged",
"image_url": "https://media.popnow.ai/influencer/examples/marco.webp"
}
}'The response carries a taskId straight away. Read the result with GET /api/v1/jobs/recordInfo, or add callBackUrl to be notified.
curl "https://api.popnow.ai/api/v1/jobs/recordInfo?taskId=TASK_ID_FROM_CREATE_TASK" \
-H "Authorization: Bearer $POPNOW_API_KEY"