FLUX.2 Klein 4B Turbo Edit API: AI Image Editing

FLUX.2 Klein 4B Turbo Edit API Reference

Endpoint

POST https://api.muapi.ai/api/v1/flux-2-klein-4b-turbo-edit

Submit a job with your MuApi API key in the x-api-key header, then poll https://api.muapi.ai/api/v1/predictions/{request_id}/result until status is completed.

Parameters

Name	Type	Required	Description
prompt	string	Yes	Text prompt describing the image, what you want the final edited image to look like.
images_list	array	Yes	List of URLs of input images for editing.
aspect_ratio	string	No	The aspect ratio of the generated imageOptions: 16:9, 9:16, 1:1, 3:4, 4:3, 21:9, 9:21Default: "1:1"

cURL example

REQUEST_ID=$(curl -s -X POST https://api.muapi.ai/api/v1/flux-2-klein-4b-turbo-edit \
  -H "x-api-key: $MUAPI_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"prompt":"<prompt>","images_list":[]}' | jq -r .request_id)

curl -s https://api.muapi.ai/api/v1/predictions/$REQUEST_ID/result -H "x-api-key: $MUAPI_API_KEY"

Python example

import os, time, requests

API = "https://api.muapi.ai/api/v1"
headers = {"x-api-key": os.environ["MUAPI_API_KEY"]}

r = requests.post(f"{API}/flux-2-klein-4b-turbo-edit", headers=headers, json={"prompt":"<prompt>","images_list":[]})
request_id = r.json()["request_id"]

while True:
    res = requests.get(f"{API}/predictions/{request_id}/result", headers=headers).json()
    if res["status"] == "completed":
        print(res["outputs"]); break
    if res["status"] == "failed":
        raise RuntimeError(res.get("error"))
    time.sleep(3)

Full docs and agent/MCP integration: llms.txt. Get an API key at muapi.ai/access-keys.