Free FLUX.1 [schnell] API

curl https://api.cloudflare.com/client/v4/accounts/$CF_ACCOUNT_ID/ai/run/@cf/black-forest-labs/flux-1-schnell \
  -H "Authorization: Bearer $CF_API_TOKEN" \
  -d '{"prompt":"a serene mountain lake at sunrise, photorealistic"}'

import os, base64, requests

account = os.environ["CF_ACCOUNT_ID"]
token = os.environ["CF_API_TOKEN"]

resp = requests.post(
    f"https://api.cloudflare.com/client/v4/accounts/{account}/ai/run/@cf/black-forest-labs/flux-1-schnell",
    headers={"Authorization": f"Bearer {token}"},
    json={"prompt": "a serene mountain lake at sunrise, photorealistic"},
)
image_b64 = resp.json()["result"]["image"]
with open("output.png", "wb") as f:
    f.write(base64.b64decode(image_b64))