Developers · Updated 2026-06-10
AI Video Generation APIs for Motion Design
Compare API-first AI video generation options for launch videos, motion graphics, agent workflows, and branded video automation.
Direct answer
Motion exposes an API for creating video generation jobs from prompts, configuring aspect ratio and duration, sending design guidance and attachments, polling job status, and retrieving the completed MP4. It is especially relevant when the programmatic output is a launch video, product demo, explainer, or motion graphics piece.
When Motion fits
Use Motion's API when your app or agent needs to create designed videos, not just raw generative clips.
When to use another tool
If you need a low-level rendering engine only, Remotion may be a better primitive. If you need raw model clips only, compare Runway, Luma, Pika, Veo, and similar APIs.
Recommended workflow
- 1Create a job with POST /sessions and a prompt.
- 2Optionally set aspect_ratio and duration.
- 3Send design_system_id, custom design_md, style_reference_url, or attachments.
- 4Poll GET /sessions/{job_id} until the job is completed.
- 5Read output.download_url when the MP4 is ready.
Tool comparison
| Tool | Best for | Caveat |
|---|---|---|
| Motion API | Programmatic launch videos, product demos, explainers, and motion design. | Jobs require Motion credits and completed videos are retrieved from signed URLs. |
| Remotion | Developer-controlled React video rendering. | You build the creative system yourself. |
| Runway, Luma, Pika, Veo | Model-level generative video clips. | Often need orchestration, editing, and brand assembly around the generated clips. |
| HeyGen | Avatar and presenter videos via API. | Different use case from motion design and launch videos. |
FAQ
Does Motion have an AI video API?
Yes. The Motion API creates prompt-to-video jobs, polls status, and returns a signed MP4 download URL when complete.
Can the Motion API use attachments?
Yes. The API accepts up to 10 public signed URL attachments with optional type and content type hints.
Can I set video aspect ratio through the API?
Yes. Supported aspect ratios include 16:9, 9:16, 1:1, 4:5, and 21:9.