Fast Flux.1 Schnell Serverless API
Fast Flux.1 Schnell by Segmind is an optimized text-to-image model designed for developers needing faster image generation. It offers high efficiency without compromising quality. Perfect for startups and engineers seeking quick, resource-efficient AI models.
POST /v2/fast-flux-schnell · 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 "fast-flux-schnell",
9 prompt="A wallpaper image of sports car with 'Flux' written on it, motion blur, side view, long shot",
10 steps=4,
11 seed=1184522,
12 aspect_ratio="1:1",
13 base64=False,
14)
15print(result["status"]) # COMPLETED
16print(result.get("output")) # model output (e.g. media URL)
17print(result["metrics"]["inference_time"]) # server compute seconds
18
19# --- Or submit + poll manually (track request_id, control the cadence) ---
20from segmind import SegmindClient, InferenceFailed, InferenceTimeout
21
22client = SegmindClient() # reads SEGMIND_API_KEY
23payload = {
24 "prompt": "A wallpaper image of sports car with 'Flux' written on it, motion blur, side view, long shot",
25 "steps": 4,
26 "seed": 1184522,
27 "aspect_ratio": "1:1",
28 "base64": False,
29}
30job = client.submit_async("fast-flux-schnell", **payload)
31print(job.request_id) # available immediately
32try:
33 result = job.wait(timeout=600, interval=1.0)
34except InferenceTimeout as e:
35 print("still running:", e.request_id)
36except InferenceFailed as e:
37 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 "fast-flux-schnell",
9 prompt="A wallpaper image of sports car with 'Flux' written on it, motion blur, side view, long shot",
10 steps=4,
11 seed=1184522,
12 aspect_ratio="1:1",
13 base64=False,
14)
15print(result["status"]) # COMPLETED
16print(result.get("output")) # model output (e.g. media URL)
17print(result["metrics"]["inference_time"]) # server compute seconds
18
19# --- Or submit + poll manually (track request_id, control the cadence) ---
20from segmind import SegmindClient, InferenceFailed, InferenceTimeout
21
22client = SegmindClient() # reads SEGMIND_API_KEY
23payload = {
24 "prompt": "A wallpaper image of sports car with 'Flux' written on it, motion blur, side view, long shot",
25 "steps": 4,
26 "seed": 1184522,
27 "aspect_ratio": "1:1",
28 "base64": False,
29}
30job = client.submit_async("fast-flux-schnell", **payload)
31print(job.request_id) # available immediately
32try:
33 result = job.wait(timeout=600, interval=1.0)
34except InferenceTimeout as e:
35 print("still running:", e.request_id)
36except InferenceFailed as e:
37 print("failed:", e.detail)API Endpoint
https://api.segmind.com/v1/fast-flux-schnellParameters
promptrequiredstringText prompt for generating the image
"A wallpaper image of sports car with 'Flux' written on it, motion blur, side view, long shot"aspect_ratiooptionalstringaspect ratio of the output image
"1:1""1:1""16:9""21:9""2:3""3:2""4:5""5:4""9:16""9:21"base64optionalbooleanBase64 encoding of the output image.
falseseedoptionalintegerSeed for random number generation
1184522stepsoptionalintegerNumber of inference steps for image generation
4Range: 1 - 8Response Type
Returns: Text/JSON
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/fast-flux-schnellSubmit — 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