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POST
cURL
Use Upload Extend when you already have a public audio URL and want to continue it without calling Upload and Extend separately.
  • Submit a publicly accessible audio_url. Recommended duration is 8 minutes or less.
  • continue_at must be >= 1 and less than the uploaded audio duration.
  • This endpoint always runs in custom mode. If prompt is empty, the extension is treated as instrumental.
  • Store the returned jobId and retrieve the result through Suno Fetch V2 or your hookUrl callback.

Authorizations

TT-API-KEY
string
header
required

You can obtain your API key from the TTAPI Dashboard.

Body

application/json
audio_url
string
required

Publicly accessible audio URL to upload and extend. Recommended duration: 8 minutes or less.

continue_at
number
required

Timestamp, in seconds, where the audio extension should begin. Must be >= 1 and less than the uploaded audio duration.

Example:

10

mv
enum<string>
default:chirp-v5

Model to use.

Available options:
chirp-v5-5,
chirp-v5,
chirp-v4-5+,
chirp-v4-5,
chirp-v4-5-all,
chirp-v4,
chirp-v3-5,
chirp-v3-0
prompt
string

Lyrics.

Used in custom mode (custom=true). Required when instrumental is false. The lyrics will be used and sung in the generated track. Maximum length: 5000 characters.

title
string

Music title.

Used in custom mode (custom=true). Maximum length: 80 characters.

tags
string

Music style or genre.

Used in custom mode (custom=true). Maximum length: 1000 characters.

Example:

"rock, blues, hip-hop, r&b"

negative_tags
string

Music styles or genres that should be excluded from generation.

Used in custom mode (custom=true).

style_weight
number

Music style weight, range: 0.00–1.00.

Used in custom mode. Valid range: 0 <= x <= 1.

Example:

0.5

weirdness_constraint
number

Audio creativity (weirdness) weight, range: 0.00–1.00.

Used in custom mode. Valid range: 0 <= x <= 1.

Example:

0.5

audio_weight
number

Audio weight, range: 0.00–1.00.

Used in custom mode. Valid range: 0 <= x <= 1.

Example:

0.5

duration
int

Audio duration, in seconds

Used in custom mode. Valid range: 10 <= x <= 360.

Example:

120

auto_lyrics
boolean
default:false

Whether to automatically generate lyrics. Custom mode only.

  • true: The input lyrics will be creatively rewritten, similar to the inspiration mode prompt effect
  • false: Use the provided lyrics directly to generate the music
vocal_gender
enum<string>

Vocal gender.

  • Male: Male voice

  • Female: Female voice

Available options:
Male,
Female
persona_id
string

Music style ID. Custom mode only.

Use this parameter to generate music with a specific style.

isStorage
boolean
default:true

Whether to store the generated audio.

  • true: The audio will be stored and a TTAPI CDN URL will be returned
  • false: The original source URL will be returned
hookUrl
string

Callback notification URL

Response

Request successful

status
string
required
Example:

"SUCCESS"

message
string
required
Example:

"success"

data
object
required
Example:
Last modified on August 25, 2026