FLUX.1 Kontext [dev] Serverless API
FLUX.1 Kontext [dev] creates coherent and editable images by integrating text and visual cues for iterative design.
POST /v2/flux-kontext-dev · submit + poll 1# pip install "segmind>=1.1.0"
2# export SEGMIND_API_KEY="YOUR_API_KEY"
3import segmind
4
5# Async (v2): submit to the queue and block until COMPLETED.
6# run() returns the final result dict (600s deadline, 1.0s poll by default).
7result = segmind.run(
8 "flux-kontext-dev",
9 seed=42,
10 prompt="Replace the background with a bokeh light effect, zooming in on the subject, keeping the person’s pose, position, scale, and camera angle identical. Only change the surrounding environment. ",
11 guidance=7,
12 input_image="https://images.segmind.com/generations/901b78cd-381a-4284-8391-306d4c7409e1/6852c6602b5db2d623cc373cfa699b55.webp",
13 aspect_ratio="match_input_image",
14 output_format="png",
15 output_quality=90,
16 num_inference_steps=35,
17 disable_safety_checker=False,
18)
19print(result["status"]) # COMPLETED
20print(result.get("output")) # model output (e.g. media URL)
21print(result["metrics"]["inference_time"]) # server compute seconds
22
23# --- Or submit + poll manually (track request_id, control the cadence) ---
24from segmind import SegmindClient, InferenceFailed, InferenceTimeout
25
26client = SegmindClient() # reads SEGMIND_API_KEY
27payload = {
28 "seed": 42,
29 "prompt": "Replace the background with a bokeh light effect, zooming in on the subject, keeping the person’s pose, position, scale, and camera angle identical. Only change the surrounding environment. ",
30 "guidance": 7,
31 "input_image": "https://images.segmind.com/generations/901b78cd-381a-4284-8391-306d4c7409e1/6852c6602b5db2d623cc373cfa699b55.webp",
32 "aspect_ratio": "match_input_image",
33 "output_format": "png",
34 "output_quality": 90,
35 "num_inference_steps": 35,
36 "disable_safety_checker": False,
37}
38job = client.submit_async("flux-kontext-dev", **payload)
39print(job.request_id) # available immediately
40try:
41 result = job.wait(timeout=600, interval=1.0)
42except InferenceTimeout as e:
43 print("still running:", e.request_id)
44except InferenceFailed as e:
45 print("failed:", e.detail) 1# pip install "segmind>=1.1.0"
2# export SEGMIND_API_KEY="YOUR_API_KEY"
3import segmind
4
5# Async (v2): submit to the queue and block until COMPLETED.
6# run() returns the final result dict (600s deadline, 1.0s poll by default).
7result = segmind.run(
8 "flux-kontext-dev",
9 seed=42,
10 prompt="Replace the background with a bokeh light effect, zooming in on the subject, keeping the person’s pose, position, scale, and camera angle identical. Only change the surrounding environment. ",
11 guidance=7,
12 input_image="https://images.segmind.com/generations/901b78cd-381a-4284-8391-306d4c7409e1/6852c6602b5db2d623cc373cfa699b55.webp",
13 aspect_ratio="match_input_image",
14 output_format="png",
15 output_quality=90,
16 num_inference_steps=35,
17 disable_safety_checker=False,
18)
19print(result["status"]) # COMPLETED
20print(result.get("output")) # model output (e.g. media URL)
21print(result["metrics"]["inference_time"]) # server compute seconds
22
23# --- Or submit + poll manually (track request_id, control the cadence) ---
24from segmind import SegmindClient, InferenceFailed, InferenceTimeout
25
26client = SegmindClient() # reads SEGMIND_API_KEY
27payload = {
28 "seed": 42,
29 "prompt": "Replace the background with a bokeh light effect, zooming in on the subject, keeping the person’s pose, position, scale, and camera angle identical. Only change the surrounding environment. ",
30 "guidance": 7,
31 "input_image": "https://images.segmind.com/generations/901b78cd-381a-4284-8391-306d4c7409e1/6852c6602b5db2d623cc373cfa699b55.webp",
32 "aspect_ratio": "match_input_image",
33 "output_format": "png",
34 "output_quality": 90,
35 "num_inference_steps": 35,
36 "disable_safety_checker": False,
37}
38job = client.submit_async("flux-kontext-dev", **payload)
39print(job.request_id) # available immediately
40try:
41 result = job.wait(timeout=600, interval=1.0)
42except InferenceTimeout as e:
43 print("still running:", e.request_id)
44except InferenceFailed as e:
45 print("failed:", e.detail)API Endpoint
https://api.segmind.com/v1/flux-kontext-devParameters
input_imagerequiredstring (uri)Reference image for context. Use jpeg, png, gif, or webp for varied image integrations.
"https://images.segmind.com/generations/901b78cd-381a-4284-8391-306d4c7409e1/6852c6602b5db2d623cc373cfa699b55.webp"promptrequiredstringDescribe generation task or image edits. Use clear and specific instructions for best results.
"Replace the background with a bokeh light effect, zooming in on the subject, keeping the person’s pose, position, scale, and camera angle identical. Only change the surrounding environment. "aspect_ratiooptionalstringSelect aspect ratio. Match input for consistency; use fixed for specific dimensions.
"match_input_image""1:1""16:9""21:9""3:2""2:3""4:5""5:4""3:4""4:3""9:16"+2 moredisable_safety_checkeroptionalbooleanTurn off NSFW filter. Use with caution if needing unrestricted content.
falseguidanceoptionalnumberDetermines adherence to prompt. Use higher values for more precision.
7Range: 0 - 10num_inference_stepsoptionalintegerSpecify number of processing steps. Use more steps for complex images and fewer for faster results.
35Range: 4 - 50output_formatoptionalstringSpecify output format. Use webp for compressibility; jpg or png for compatibility.
"png""webp""jpg""png"output_qualityoptionalintegerDetermine output image quality. Use high values for detailed images and adjustments for jpg outputs.
90Range: 0 - 100seedoptionalintegerSet a random seed for reproducibility. Use for consistent results; leave blank for randomness.
42Response Type
Returns: Image
Asynchronous requests (v2)
Use Async for video, long-running (>~60s), or high-concurrency workloads; Sync is simplest for fast image & LLM calls. Async submits a request and you poll it to completion.
- 1
POST /v2/flux-kontext-devSubmit — returns request_id, status_url, response_url
- 2
GET /v2/requests/{id}/statusPoll — until COMPLETED or FAILED
- 3
GET /v2/requests/{id}Result — final response body
Status states
- A FAILED request is served as HTTP 422 — the body still carries the error detail.
- An unknown or expired request_id returns HTTP 404.
- Results are retained for 1 hour, then expire.
- Content / RAI blocks surface as FAILED, not a separate state.
- Track completion by polling the status endpoint.
Common Error Codes
The API returns standard HTTP status codes. Detailed error messages are provided in the response body.
Bad Request
Invalid parameters or request format
Unauthorized
Missing or invalid API key
Forbidden
Insufficient permissions
Not Found
Model or endpoint not found
Insufficient Credits
Not enough credits to process request
Rate Limited
Too many requests
Server Error
Internal server error
Bad Gateway
Service temporarily unavailable
Timeout
Request timed out