Seedance 2.0 API Guide: Access, Inputs, and Parameters
May 14, 2026By Bilal Azhar
Understand Seedance 2.0 API access, text-to-video, image-to-video, reference-to-video inputs, key parameters, pricing tradeoffs, and no-code alternatives.
The Seedance 2.0 API is useful when you need programmatic video generation, but most creators do not need to manage provider keys or webhooks. Use Seedance 2.0 on Morphed for no-code generation, or use API access when you need to automate text-to-video, image-to-video, or reference-to-video at scale.
Seedance 2.0 API access matters for teams that need to generate video inside an app, queue batches, or connect generation to a creative pipeline. For everyone else, a no-code UI is usually faster.
The practical question is not "does an API exist?" It does. The better question is whether you need to own provider credentials, file uploads, webhook handling, result storage, retries, moderation, and credit accounting. If you just want to create videos, use Morphed's Seedance 2.0 model page. If you need automation, this guide explains the core API concepts.
The API is not just a prompt box with an endpoint. Video generation behaves more like a small render pipeline: upload files, submit a job, wait for completion, store the result, handle failure, and decide what to do when the model output is technically complete but creatively unusable. That is where most teams underestimate the work.
Who Actually Needs The API?
Use API access when Seedance is part of a product or repeatable backend workflow. If the work is creative exploration, a UI is usually better because people need to see, compare, and revise outputs quickly.
| User Type | Better Path | Reason |
|---|---|---|
| Solo creator | Morphed UI | Faster prompt testing, no key management |
| Agency creative team | Morphed UI first, API later | Build prompt templates before automation |
| SaaS product | API | Generation happens inside your app |
| Ecommerce catalog team | API for batches | Many similar product clips from structured data |
| Internal marketing team | Morphed UI | Human review matters more than automation |
The safest path for most teams is to prototype prompts manually, then automate only the workflows that prove repeatable.
What Endpoints Matter?
Most Seedance 2.0 API access falls into three workflows.
| Workflow | Input | Best For |
|---|---|---|
| Text-to-video | Prompt only | Concept exploration, b-roll, general scenes |
| Image-to-video | Image plus prompt | Product animation, portrait motion, still-photo animation |
| Reference-to-video | Text plus images, videos, or audio | Brand consistency, character continuity, beat-synced edits |
The most important implementation detail is file discipline. Reference-to-video is powerful because images can define identity, videos can define motion, and audio can define timing. It becomes unreliable when every reference is expected to do everything.
For example, a product launch workflow might use one image for the exact product, one short video for camera movement, and one audio clip for beat timing. The API can pass all of that, but your application still has to make the creative hierarchy clear.
What Parameters Should Developers Expose?
Expose the parameters that change output quality and cost. Hide provider-specific options unless your users understand them.
| Parameter | Why It Matters |
|---|---|
| Prompt | Defines action, camera, sound, and cuts |
| Duration | Controls pacing and cost; Seedance supports 4-15s in common provider flows |
| Aspect ratio | Match platform: 9:16 for TikTok, 16:9 for YouTube, 1:1 for feeds |
| Resolution | Standard supports up to 1080p; Fast is better for draft work |
| Audio generation | Useful for synced ambience, Foley, and dialogue-adjacent scenes |
| References | Identity, product shape, camera rhythm, beat timing |
Do not expose every raw provider field by default. More toggles usually make generation worse for non-technical users.
If you are building a UI on top of the API, name controls by creative intent instead of provider jargon. "Draft quality" and "Final quality" are easier to understand than raw resolution/cost combinations. "Add synced ambience" is clearer than exposing a bare generate_audio switch without context.
API Access vs Morphed UI
Use the API when generation is part of your product. Use Morphed when generation is the creative task.
| Need | Better Choice |
|---|---|
| Generate one-off clips | Morphed UI |
| Compare Seedance with Kling, Veo, Sora, and Wan | Morphed UI |
| Batch-generate from CMS rows | API |
| Add video generation to your own app | API |
| Avoid key management and webhooks | Morphed UI |
| Custom moderation, billing, and storage | API |
Morphed is also useful for prompt development before automation. Draft prompts in the UI, identify the settings that work, then move stable templates into an API workflow.
That workflow mirrors how creative teams actually behave. Nobody knows the final prompt before seeing output. The UI is where you discover the shot. The API is where you repeat it.
Cost Planning
Video API costs scale by seconds, resolution, and rerolls. A 15-second failed output costs more than a 4-second failed output, and 1080p final renders cost more than 480p drafts.
On Morphed today, Seedance 2.0 Standard is priced by resolution: 13.5 credits/s at 480p, 30.5 credits/s at 720p, and 68.5 credits/s at 1080p. Seedance 2.0 Fast is 11 credits/s at 480p and 24.5 credits/s at 720p.
| Workflow | Practical Cost Strategy |
|---|---|
| Prompt testing | Fast, 480p or 720p, 4-6s |
| Social draft variants | Fast, 720p, 6-8s |
| Final product clip | Standard, 1080p, 8-10s |
| Multi-shot ad | Standard, 720p or 1080p, 10-15s |
For API planning, budget for rerolls. A perfect spreadsheet that assumes one request equals one usable video will be wrong on day one. For production workflows, plan around usable output, not raw job count.
Security Notes
Never put provider API keys in browser code. Route requests through your server, apply moderation before the provider call, store outputs in your own storage if you need durability, and log provider request IDs for support.
For app builders, the hardest part is usually not the first successful API call. It is handling failed jobs, expired result URLs, refunds, user quotas, and provider-specific webhook shapes. That is why a provider-neutral generation layer matters once you support more than one model.
A Practical API Flow
A solid Seedance implementation usually looks like this:
- Validate the prompt and uploaded files.
- Apply moderation before spending provider credits.
- Upload or proxy source media through a controlled storage path.
- Submit the generation request with duration, aspect ratio, resolution, and audio settings.
- Store the provider request ID.
- Receive webhook or poll status until completion.
- Copy the result into your own storage before temporary URLs expire.
- Mark credits spent, refunded, or failed according to your product rules.
That sounds less exciting than the model demo, but it is what separates a toy integration from a product feature.