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POST
cURL

Authorizations

Authorization
string
header
required

Bearer token authentication. Format Bearer <token> where <token> is your API Key.

Body

model
enum<string>
required

Use volc-asset-audio. For specific content requests, select volc-asset-audio-nsfw under the Direct resource group.

Available options:
volc-asset-audio,
volc-asset-audio-nsfw
Example:

"volc-asset-audio"

GroupId
string
required

Asset group ID.

Example:

"group-20260319072926-rrnmg"

AssetType
enum<string>
required

Asset type. Fixed value Audio. Supported formats: WAV and MP3. Each clip must be 2–30 seconds and no larger than 15 MB.

Available options:
Audio
Example:

"Audio"

URL
string
required

Audio source. AnyFast accepts a publicly accessible URL, Data URI, or raw Base64 string. The audio must be WAV or MP3, 2–30 seconds, and no larger than 15 MB. Avoid Base64 for large files.

Example:

"https://example.com/audio.mp3"

Name
string

Asset name, up to 64 characters. Used only for fuzzy search in ListAssets and not passed to model inference.

Maximum string length: 64
Example:

"background-music"

ProjectName
string
default:default

Project that owns the asset. Must match the ProjectName of the target asset group; omit it for the default project.

Example:

"default"

Response

The audio was accepted for asynchronous processing. Poll GetAsset until Status becomes Active or Failed; upload-time SLA is not guaranteed. Audio activation is typically 3–6 seconds in ideal conditions and may take about 10 seconds to 2 minutes when the review queue is congested.

Id
string

Asset ID. After Status becomes Active, use asset://<ID> in Seedance requests instead of the temporary GetAsset URL.

Example:

"asset-20260320120147-pqwhc"