Flux.1 Image To Image Serverless API

Flux Image-To-Image model by Black Forest Labs is an advanced deep learning tool designed for transforming images based on specific textual prompts.

~24.99s
POST /v2/flux-img2img · 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-img2img",
 9    prompt="anime style",
10    image="https://segmind-sd-models.s3.amazonaws.com/display_images/flux-i2i-ip.png",
11    steps=20,
12    seed=46588,
13    denoise=0.75,
14    scheduler="simple",
15    sampler_name="euler",
16    base64=False,
17)
18print(result["status"])                      # COMPLETED
19print(result.get("output"))                  # model output (e.g. media URL)
20print(result["metrics"]["inference_time"])   # server compute seconds
21
22# --- Or submit + poll manually (track request_id, control the cadence) ---
23from segmind import SegmindClient, InferenceFailed, InferenceTimeout
24
25client = SegmindClient()                      # reads SEGMIND_API_KEY
26payload = {
27    "prompt": "anime style",
28    "image": "https://segmind-sd-models.s3.amazonaws.com/display_images/flux-i2i-ip.png",
29    "steps": 20,
30    "seed": 46588,
31    "denoise": 0.75,
32    "scheduler": "simple",
33    "sampler_name": "euler",
34    "base64": False,
35}
36job = client.submit_async("flux-img2img", **payload)
37print(job.request_id)                         # available immediately
38try:
39    result = job.wait(timeout=600, interval=1.0)
40except InferenceTimeout as e:
41    print("still running:", e.request_id)
42except InferenceFailed as e:
43    print("failed:", e.detail)

API Endpoint

POSThttps://api.segmind.com/v1/flux-img2img

Parameters

denoiserequired
number

Denoising strength

Default: 0.75Range: 0 - 1
imagerequired
string (uri)

URL of the input image

Default: "https://segmind-sd-models.s3.amazonaws.com/display_images/flux-i2i-ip.png"
promptrequired
string

Text prompt describing the desired image style

Default: "3d pixar style"
sampler_namerequired
string

Sampler name

Default: "euler"
Allowed values (26 total):
"euler""euler_cfg_pp""euler_ancestra""leuler_ancestral_cfg_pp""heun""heunpp2""dpm_2""dpm_2_ancestral""lms""dpm_fast"+16 more
schedulerrequired
string

Scheduler type

Default: "simple"
Allowed values :
"normal""karras""exponential""sgm_uniform""simple""ddim_uniform""beta"
stepsrequired
integer

Number of inference steps

Default: 20Range: 1 - 50
base64optional
boolean

Output as base64 encoded string

Default: false
seedoptional
integer

Seed for random number generation

Default: 46588

Response 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. 1
    POST /v2/flux-img2img

    Submitreturns request_id, status_url, response_url

  2. 2
    GET /v2/requests/{id}/status

    Polluntil COMPLETED or FAILED

  3. 3
    GET /v2/requests/{id}

    Resultfinal response body

Status states

QUEUEDAccepted, waiting for a worker
PROCESSINGRunning on a worker
COMPLETEDDone — result body is ready
FAILEDErrored (incl. content/RAI blocks)
  • 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.

400

Bad Request

Invalid parameters or request format

401

Unauthorized

Missing or invalid API key

403

Forbidden

Insufficient permissions

404

Not Found

Model or endpoint not found

406

Insufficient Credits

Not enough credits to process request

429

Rate Limited

Too many requests

500

Server Error

Internal server error

502

Bad Gateway

Service temporarily unavailable

504

Timeout

Request timed out