To put the Seedance 2.5 website API into production, make every generation a durable job: validate its settings, obtain a quote, enforce a cost cap, save its submission identity, and download the output after success. A working first request is only the beginning. Your application also needs a clear response to timeouts, repeated submissions, and expired download links.
Last verified: 2026-10-26
This guide covers the API documented on this website. Start with the API overview; the recommendations below explain how to organize an application around that contract. They are implementation guidance, not a report of a live integration test.
Compare a prototype with a production workflow
| Concern | Prototype shortcut | Production behavior to implement |
|---|---|---|
| Request settings | Copy a sample and leave it unchanged | Validate the chosen model and settings against the current catalog |
| Cost | Display a fixed estimate | Request a quote and enforce an approved maximum |
| Submission | Keep the result only in browser memory | Persist the local job and returned generation ID |
| Timeout | Submit again as a new job | Recover the original submission identity before retrying |
| Completion | Treat an accepted request as finished | Track the remote state until a terminal result |
| Delivery | Embed the temporary output URL | Copy the completed media into controlled storage |
1. Establish the API contract before writing the worker
The documented base URL is https://seedance2-5.com/api/v1. Business endpoints use Bearer authentication, and generation calls belong on your server. API generation and image uploads require an active paid subscription or remaining purchased credits. See the API overview.
Use seedance-2.5 as the model identifier, then query GET /models for its current supported combinations. For Seedance 2.5, keep resolution choices to 480p, 720p, or 1080p, subject to the selected mode's catalog entry. Do not infer API fields from a browser control. The models and pricing reference defines the request parameters.
Keep credentials in server-managed secrets. Let the frontend send your application an internal job request, rather than passing a provider key to the client.
2. Separate a quote from permission to spend
The documented POST /quotes response includes cost_credits. Quoting does not itself generate a video or charge generation credits. Set max_cost_credits on the generation request to reject a price above the approved maximum. Consult models and pricing.
Your own application should record which exact payload the user approved. If they change the duration, resolution, prompt, or input assets, obtain a fresh quote before submitting the changed job. Keep the accepted configuration immutable so support can reconstruct the request later.
A useful local record is:
local_job_id
payload_version
approved_cost_cap
idempotency_key
remote_generation_id
last_remote_status
output_storage_key
last_error_summary
These are suggested application fields, not API response properties. Keep secrets and temporary download URLs out of ordinary logs.
3. Make retries refer to the same intended job
The quickstart documents an Idempotency-Key header for submission. Use a distinct key for each intended generation. After a timeout, reuse the original API key, idempotency key, and request body for that same job.
Persist the local record before sending the request. Otherwise, a worker crash can erase the information needed to identify a submission that the service already accepted.
A useful failure drill is to simulate losing the response after submission. The recovery path should retrieve the saved job record and retry consistently, rather than construct a new generation. Run that drill in your integration's test environment; this article does not claim that it has been executed.
4. Distinguish remote completion from application delivery
A 202 response means the request was accepted or replayed, not that the video is finished. Save its id and poll GET /generations/{id} using the original API key, no more frequently than once every ten seconds while active. The submission and polling steps appear in the quickstart.
| Remote state | Application response |
|---|---|
pending or processing |
Keep the job active and schedule the next status check |
success |
Start output retrieval |
failed or canceled |
Record the terminal result and show an actionable message |
expired |
Mark the retained output unavailable |
After remote success, use a separate local delivery state. A storage failure should trigger another download attempt while the source remains available, not another video generation.
5. Store the file before presenting a permanent result
Successful responses expose outputs[].url and expires_at. Signed links last at most fifteen minutes, and generated media is retained for fourteen days. While the asset remains retained, another status query can obtain a fresh link. See async generations.
Download promptly into your own storage. Verify that the download completed and that the saved object is readable before marking the local job delivered. Use your stored asset as the application result. This keeps a user's project from depending on a temporary link.
For rollout, begin with a bounded worker queue and review the current account limits in models and pricing. Monitor accepted jobs, terminal failures, and delivery failures separately so a download issue does not look like a generation failure.
FAQ
Is this the same account balance as the website?
Yes. The API documentation states that it uses the website balance and pricing. API generation still has its documented access conditions and limits.
Does signing up give me a free first video?
Signing up provides free credits, enough for one video in the browser workflow. Do not treat those trial credits as proof of API generation eligibility: API generation requires an active paid subscription or remaining purchased credits.
Can I use a new idempotency key after a timeout?
For a retry of the same intended generation, preserve the original submission identity and exact body. A new key identifies a new intended generation and can lead to another charge.
Can the API send me a completion webhook?
The documented API version does not provide webhooks. Build the workflow around its status endpoint. See the API overview.
Should I regenerate when the output link expires?
First check whether the asset remains within retention. The documented status query can return a fresh signed link while the asset is retained. Regeneration is a separate creative and billing decision.
What should I test before enabling a larger queue?
Test invalid input, an over-budget request, a lost submission response, an active job across a worker restart, and a failed output download. Confirm that each case leads to the correct local state without an accidental replacement generation.
Prepare the creative brief, then automate it
Open Seedance 2.5 to establish a clear scene brief, then implement the documented API workflow with durable job records and explicit delivery handling. Keep creative review and operational success as separate acceptance checks: a downloaded file still needs to meet the project's visual requirements.
