FLUX 3 Max API

# Text-to-video (prompt only; aspect_ratio "auto" = 16:9)
curl -X POST https://api.apimodels.app/v1/video/generations \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "flux-3-max",
    "prompt": "A street drummer plays on an upturned bucket at dusk, crowd clapping along, warm streetlights, handheld camera",
    "duration": 5,
    "resolution": "720p"
  }'

# Image-to-video: first frame (+ optional last frame); "auto" follows the first image
curl -X POST https://api.apimodels.app/v1/video/generations \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "flux-3-max",
    "prompt": "The camera pushes in slowly as the lanterns light up one by one",
    "first_frame_url": "https://example.com/first.jpg",
    "last_frame_url": "https://example.com/last.jpg",
    "duration": 8,
    "resolution": "1080p"
  }'

# Keyframes-to-video: up to 10 images pinned to moments (time in seconds, or frame_index at 24 fps)
curl -X POST https://api.apimodels.app/v1/video/generations \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "flux-3-max",
    "prompt": "A paper airplane flies from the desk, out of the window and over the rooftops",
    "keyframes": [
      { "image_url": "https://example.com/desk.jpg", "time": 0 },
      { "image_url": "https://example.com/window.jpg", "time": 4 },
      { "image_url": "https://example.com/rooftops.jpg", "frame_index": 240 }
    ],
    "duration": 10,
    "resolution": "720p",
    "aspect_ratio": "16:9",
    "generate_audio": false
  }'

# Response (async — a task is created):
# { "code": 200, "msg": "success", "data": { "taskId": "clxxx", "state": "pending" } }

# Poll until completed (result files are kept 30 days)
curl "https://api.apimodels.app/v1/video/generations?task_id=TASK_ID" \
  -H "Authorization: Bearer YOUR_API_KEY"
# { "code": 200, "data": { "state": "completed",
#     "resultUrls": ["https://r2.apimodels.app/videos/clxxx.mp4"] } }