Use RunComfy's API to run blackforestlabs/flux-3/edit. For accepted inputs and outputs, see the model's schema.
curl --request POST \
--url https://model-api.runcomfy.net/v1/models/blackforestlabs/flux-3/edit \
--header "Content-Type: application/json" \
--header "Authorization: Bearer <token>" \
--data '{
"images": [
"https://playgrounds-storage-public.runcomfy.net/tools/7463/media-files/promo-input.webp"
],
"prompt": "Turn image 1 into a furniture campaign advertisement. Keep the same ceramic table lamp: the round speckled white base and the oatmeal linen shade. Switch the lamp on so warm light glows through the shade. Place it on a low oak side table in a dim evening living room, with a soft pool of light on the wall and a blurred window showing blue dusk. Add the headline \"AFTER HOURS\" in cream serif at the upper left, and \"CERAMIC LAMP\" in small spaced capitals beneath it. Do not change the lamp's shape."
}'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.
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-3/edit \
--header "Content-Type: application/json" \
--header "Authorization: Bearer <token>" \
--data '{
"images": [
"https://playgrounds-storage-public.runcomfy.net/tools/7463/media-files/promo-input.webp"
],
"prompt": "Turn image 1 into a furniture campaign advertisement. Keep the same ceramic table lamp: the round speckled white base and the oatmeal linen shade. Switch the lamp on so warm light glows through the shade. Place it on a low oak side table in a dim evening living room, with a soft pool of light on the wall and a blurred window showing blue dusk. Add the headline \"AFTER HOURS\" in cream serif at the upper left, and \"CERAMIC LAMP\" in small spaced capitals beneath it. Do not change the lamp's shape."
}'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 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 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>"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.
{
"type": "object",
"title": "Input schema",
"required": [
"images",
"prompt"
],
"properties": {
"images": {
"title": "Images",
"description": "One to ten source images, in the order the instruction names them. Each side must be at least 256 pixels, and each image must be no larger than 4 megapixels.",
"type": "array",
"items": {
"type": "string",
"format": "image_uri"
},
"minItems": 1,
"maxItems": 10,
"default": [
"https://playgrounds-storage-public.runcomfy.net/tools/7463/media-files/promo-input.webp"
]
},
"prompt": {
"title": "Prompt",
"description": "What should change, and what should stay. Name uploads in order, such as image 1 and image 2. Put exact on-image wording in quotes.",
"type": "string",
"default": "Turn image 1 into a furniture campaign advertisement. Keep the same ceramic table lamp: the round speckled white base and the oatmeal linen shade. Switch the lamp on so warm light glows through the shade. Place it on a low oak side table in a dim evening living room, with a soft pool of light on the wall and a blurred window showing blue dusk. Add the headline \"AFTER HOURS\" in cream serif at the upper left, and \"CERAMIC LAMP\" in small spaced capitals beneath it. Do not change the lamp's shape."
},
"aspect_ratio": {
"title": "Aspect Ratio",
"description": "Output frame. auto follows the first image.",
"type": "string",
"enum": [
"auto",
"21:9",
"2:1",
"16:9",
"3:2",
"7:5",
"4:3",
"5:4",
"1:1",
"4:5",
"3:4",
"5:7",
"2:3",
"9:16",
"1:2"
],
"default": "auto"
},
"resolution": {
"title": "Resolution",
"description": "Output size tier. This is the only setting that changes the price.",
"type": "string",
"enum": [
"1k",
"2k",
"4k"
],
"default": "1k"
},
"enable_prompt_expansion": {
"title": "Enable Prompt Expansion",
"description": "Expand a short instruction while keeping the intended edit and the role of each image.",
"type": "boolean",
"default": false
},
"output_format": {
"title": "Output Format",
"description": "File type of the returned still. png avoids extra JPEG compression.",
"type": "string",
"enum": [
"jpeg",
"png"
],
"default": "jpeg"
}
}
}{
"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.