Apiframe’s Flux 3 endpoint converts text prompts, image storyboards, or an existing MP4 into videos lasting 5–20 seconds. One image sets the opening frame, two define the start and end, and up to 10 images become evenly spaced storyboard keyframes. Developers can choose 720p or 1080p, several aspect ratios, explicit duration, audio generation, and draft mode. Audio includes synchronized ambient sound, speech, and effects, with no additional charge. Existing clips can be continued through the start_video parameter, allowing chained sequences beyond the single-generation limit. Requests use POST /v2/videos/generate and return a job ID for polling or webhook delivery. Apiframe also provides a browser playground, API documentation, credit-based pricing, and one balance shared across its media models.