Flux 2 LoRA Edit: Precision Image-to-Image Editing AI on playground and API | RunComfy
Transform and edit your images using the Black Forest Labs Flux 2 LoRA model to apply custom styles, characters, or details via LoRA adapters on RunComfy.
Table of contents
1. Get started
Use RunComfy's API to run blackforestlabs/flux-2/lora/edit. For accepted inputs and outputs, see the model's schema.
curl --request POST \
--url https://model-api.runcomfy.net/v1/models/blackforestlabs/flux-2/lora/edit \
--header "Content-Type: application/json" \
--header "Authorization: Bearer <token>" \
--data '{
"prompt": "<sks> back view shot",
"image_urls": [
"https://playgrounds-storage-public.runcomfy.net/tools/7242/media-files/input-1-1.png"
]
}'2. Authentication
Set the YOUR_API_TOKEN environment variable with your API key (manage keys in your Profile) and include it on every request as a Bearer token via the Authorization header: Authorization: Bearer $YOUR_API_TOKEN.
3. API reference
Submit a request
Submit an asynchronous generation job and immediately receive a request_id plus URLs to check status, fetch results, and cancel.
curl --request POST \
--url https://model-api.runcomfy.net/v1/models/blackforestlabs/flux-2/lora/edit \
--header "Content-Type: application/json" \
--header "Authorization: Bearer <token>" \
--data '{
"prompt": "<sks> back view shot",
"image_urls": [
"https://playgrounds-storage-public.runcomfy.net/tools/7242/media-files/input-1-1.png"
]
}'Monitor request status
Fetch the current state for a request_id ("in_queue", "in_progress", "completed", or "cancelled").
curl --request GET \
--url https://model-api.runcomfy.net/v1/requests/{request_id}/status \
--header "Authorization: Bearer <token>"Retrieve request results
Retrieve the final outputs and metadata for the given request_id; if the job is not complete, the response returns the current state so you can continue polling.
curl --request GET \
--url https://model-api.runcomfy.net/v1/requests/{request_id}/result \
--header "Authorization: Bearer <token>"Cancel a request
Cancel a queued job by request_id, in-progress jobs cannot be cancelled.
curl --request POST \
--url https://model-api.runcomfy.net/v1/requests/{request_id}/cancel \
--header "Authorization: Bearer <token>"4. File inputs
Hosted file (URL)
Provide a publicly reachable HTTPS URL. Ensure the host allows server‑side fetches (no login/cookies required) and isn't rate‑limited or blocking bots. Recommended limits: images ≤ 50 MB (~4K), videos ≤ 100 MB (~2–5 min @ 720p). Prefer stable or pre‑signed URLs for private assets.
5. Schema
Input schema
{
"type": "object",
"title": "Input",
"required": [
"prompt",
"image_urls"
],
"properties": {
"prompt": {
"title": "Prompt",
"description": "",
"type": "string",
"default": "<sks> back view shot"
},
"image_urls": {
"title": "Image URLs",
"description": "URLs of up to 3 images for editing. If more are provided, only the first 3 will be used.",
"type": "array",
"items": {
"type": "string",
"format": "image_uri"
},
"maxItems": 3,
"minItems": 0,
"default": [
"https://playgrounds-storage-public.runcomfy.net/tools/7242/media-files/input-1-1.png"
]
},
"loras": {
"title": "LoRAs",
"description": "List of LoRA weights to apply (maximum 3). Each LoRA can be a URL, HuggingFace repo ID, or local path.",
"type": "array",
"default": [
{
"path": "lovis93/Flux-2-Multi-Angles-LoRA-v2",
"scale": 1
}
],
"items": {
"path": {
"title": "LoRA Path",
"description": "URL, HuggingFace repo ID (owner/repo), or local path to LoRA weights.",
"type": "string",
"format": "str",
"default": ""
},
"scale": {
"title": "LoRA Scale",
"description": "Scale factor for LoRA application (0.0 to 4.0). ",
"type": "float",
"format": "float_slider_with_range",
"minimum": 0,
"maximum": 4,
"default": 1
}
},
"maxItems": 3,
"minItems": 0
},
"guidance_scale": {
"title": "Guidance Scale",
"description": "How closely the model should follow the prompt.",
"type": "float",
"default": 2.5,
"minimum": 0,
"maximum": 20
},
"seed": {
"title": "Seed",
"description": "",
"type": "integer",
"default": null
},
"num_inference_steps": {
"title": "Number of Inference Steps",
"description": "The number of inference steps to perform.",
"type": "integer",
"default": 28,
"minimum": 4,
"maximum": 50
},
"image_size": {
"title": "Image Size",
"description": "Choose a preset size or select Custom to specify width and height between 512 and 2048 pixels.",
"type": "string",
"enum": [
"square_hd",
"square",
"portrait_4_3",
"portrait_16_9",
"landscape_4_3",
"landscape_16_9"
],
"default": "square_hd"
},
"output_format": {
"title": "Output Format",
"description": "The format of the generated image.",
"type": "string",
"enum": [
"jpeg",
"png",
"webp"
],
"default": "png"
}
}
}Output schema
{
"output": {
"type": "object",
"properties": {
"image": {
"type": "string",
"format": "uri",
"description": "single image URL"
},
"video": {
"type": "string",
"format": "uri",
"description": "single video URL"
},
"images": {
"type": "array",
"description": "multiple image URLs",
"items": { "type": "string", "format": "uri" }
},
"videos": {
"type": "array",
"description": "multiple video URLs",
"items": { "type": "string", "format": "uri" }
}
}
}
}RunComfy is the premier ComfyUI platform, offering ComfyUI online environment and services, along with ComfyUI workflows featuring stunning visuals. RunComfy also provides AI Models, enabling artists to harness the latest AI tools to create incredible art.