Suno Extend-Music
Use the extend music endpoint to create an asynchronous Task.
Overview
Use the extend music endpoint with a supported model. Use the returned Task ID to retrieve its state, or provide callback_url for the deliveries documented below.
Quick start
- Create an API key and set it as RUNAPI_API_KEY.
- Choose a supported model and send a POST request whose body matches that model's schema.
- Store the returned task ID, then poll until a terminal state or handle the callbacks documented below.
Endpoint
- Base URL
https://runapi.ai- API version
v1- Authentication
Authorization: Bearer YOUR_API_TOKEN
Supported models
Open a model page for current pricing, rate limits, and commercial-usage details.
Request schema
Fields and allowed values depend on the selected model. When supplied, callback_url receives the Task deliveries documented below.
suno-v420 fields
audio_idstringSource audio ID to extend. Provide one of task_id, audio_id, audio_url, or upload_url.
audio_urlstringSource audio URL to extend. Provide one of task_id, audio_id, audio_url, or upload_url.
audio_weightnumberAudio weight (0-1).
Range:0 - 1
callback_urlstringWebhook URL for async notifications.
continue_atnumberSeconds into the source to continue from. Required in custom parameter mode.
instrumentalbooleanWhen true, generate without vocals.
lyricsstringExact lyrics. Only allowed when extending uploaded audio in custom parameter mode.
Bound:5000
modelstringModel slug.
negative_tagsstringStyles to avoid.
parameter_modestringInherit the source track's parameters (source) or supply custom ones (custom).
Allowed values:source, custom
persona_idstringPersona ID.
persona_typestringPersona type.
Allowed values:style, voice
promptstringExtension brief. Cannot be combined with lyrics.
Bound:5000
stylestringStyle preset. Required in custom parameter mode.
Bound:1000
style_weightnumberStyle adherence weight (0-1).
Range:0 - 1
task_idstringSource task ID to extend. Provide one of task_id, audio_id, audio_url, or upload_url.
titlestringSong title. Required in custom parameter mode.
Bound:80
upload_urlstringUploaded source audio URL to extend. Provide one of task_id, audio_id, audio_url, or upload_url.
vocal_genderstringVocal gender.
Allowed values:male, female
weirdness_constraintnumberWeirdness constraint (0-1).
Range:0 - 1
suno-v4.520 fields
audio_idstringSource audio ID to extend. Provide one of task_id, audio_id, audio_url, or upload_url.
audio_urlstringSource audio URL to extend. Provide one of task_id, audio_id, audio_url, or upload_url.
audio_weightnumberAudio weight (0-1).
Range:0 - 1
callback_urlstringWebhook URL for async notifications.
continue_atnumberSeconds into the source to continue from. Required in custom parameter mode.
instrumentalbooleanWhen true, generate without vocals.
lyricsstringExact lyrics. Only allowed when extending uploaded audio in custom parameter mode.
Bound:5000
modelstringModel slug.
negative_tagsstringStyles to avoid.
parameter_modestringInherit the source track's parameters (source) or supply custom ones (custom).
Allowed values:source, custom
persona_idstringPersona ID.
persona_typestringPersona type.
Allowed values:style, voice
promptstringExtension brief. Cannot be combined with lyrics.
Bound:5000
stylestringStyle preset. Required in custom parameter mode.
Bound:1000
style_weightnumberStyle adherence weight (0-1).
Range:0 - 1
task_idstringSource task ID to extend. Provide one of task_id, audio_id, audio_url, or upload_url.
titlestringSong title. Required in custom parameter mode.
Bound:80
upload_urlstringUploaded source audio URL to extend. Provide one of task_id, audio_id, audio_url, or upload_url.
vocal_genderstringVocal gender.
Allowed values:male, female
weirdness_constraintnumberWeirdness constraint (0-1).
Range:0 - 1
suno-v4.5-all20 fields
audio_idstringSource audio ID to extend. Provide one of task_id, audio_id, audio_url, or upload_url.
audio_urlstringSource audio URL to extend. Provide one of task_id, audio_id, audio_url, or upload_url.
audio_weightnumberAudio weight (0-1).
Range:0 - 1
callback_urlstringWebhook URL for async notifications.
continue_atnumberSeconds into the source to continue from. Required in custom parameter mode.
instrumentalbooleanWhen true, generate without vocals.
lyricsstringExact lyrics. Only allowed when extending uploaded audio in custom parameter mode.
Bound:5000
modelstringModel slug.
negative_tagsstringStyles to avoid.
parameter_modestringInherit the source track's parameters (source) or supply custom ones (custom).
Allowed values:source, custom
persona_idstringPersona ID.
persona_typestringPersona type.
Allowed values:style, voice
promptstringExtension brief. Cannot be combined with lyrics.
Bound:5000
stylestringStyle preset. Required in custom parameter mode.
Bound:1000
style_weightnumberStyle adherence weight (0-1).
Range:0 - 1
task_idstringSource task ID to extend. Provide one of task_id, audio_id, audio_url, or upload_url.
titlestringSong title. Required in custom parameter mode.
Bound:80
upload_urlstringUploaded source audio URL to extend. Provide one of task_id, audio_id, audio_url, or upload_url.
vocal_genderstringVocal gender.
Allowed values:male, female
weirdness_constraintnumberWeirdness constraint (0-1).
Range:0 - 1
suno-v4.5-plus20 fields
audio_idstringSource audio ID to extend. Provide one of task_id, audio_id, audio_url, or upload_url.
audio_urlstringSource audio URL to extend. Provide one of task_id, audio_id, audio_url, or upload_url.
audio_weightnumberAudio weight (0-1).
Range:0 - 1
callback_urlstringWebhook URL for async notifications.
continue_atnumberSeconds into the source to continue from. Required in custom parameter mode.
instrumentalbooleanWhen true, generate without vocals.
lyricsstringExact lyrics. Only allowed when extending uploaded audio in custom parameter mode.
Bound:5000
modelstringModel slug.
negative_tagsstringStyles to avoid.
parameter_modestringInherit the source track's parameters (source) or supply custom ones (custom).
Allowed values:source, custom
persona_idstringPersona ID.
persona_typestringPersona type.
Allowed values:style, voice
promptstringExtension brief. Cannot be combined with lyrics.
Bound:5000
stylestringStyle preset. Required in custom parameter mode.
Bound:1000
style_weightnumberStyle adherence weight (0-1).
Range:0 - 1
task_idstringSource task ID to extend. Provide one of task_id, audio_id, audio_url, or upload_url.
titlestringSong title. Required in custom parameter mode.
Bound:80
upload_urlstringUploaded source audio URL to extend. Provide one of task_id, audio_id, audio_url, or upload_url.
vocal_genderstringVocal gender.
Allowed values:male, female
weirdness_constraintnumberWeirdness constraint (0-1).
Range:0 - 1
suno-v520 fields
audio_idstringSource audio ID to extend. Provide one of task_id, audio_id, audio_url, or upload_url.
audio_urlstringSource audio URL to extend. Provide one of task_id, audio_id, audio_url, or upload_url.
audio_weightnumberAudio weight (0-1).
Range:0 - 1
callback_urlstringWebhook URL for async notifications.
continue_atnumberSeconds into the source to continue from. Required in custom parameter mode.
instrumentalbooleanWhen true, generate without vocals.
lyricsstringExact lyrics. Only allowed when extending uploaded audio in custom parameter mode.
Bound:5000
modelstringModel slug.
negative_tagsstringStyles to avoid.
parameter_modestringInherit the source track's parameters (source) or supply custom ones (custom).
Allowed values:source, custom
persona_idstringPersona ID.
persona_typestringPersona type.
Allowed values:style, voice
promptstringExtension brief. Cannot be combined with lyrics.
Bound:5000
stylestringStyle preset. Required in custom parameter mode.
Bound:1000
style_weightnumberStyle adherence weight (0-1).
Range:0 - 1
task_idstringSource task ID to extend. Provide one of task_id, audio_id, audio_url, or upload_url.
titlestringSong title. Required in custom parameter mode.
Bound:80
upload_urlstringUploaded source audio URL to extend. Provide one of task_id, audio_id, audio_url, or upload_url.
vocal_genderstringVocal gender.
Allowed values:male, female
weirdness_constraintnumberWeirdness constraint (0-1).
Range:0 - 1
suno-v5.520 fields
audio_idstringSource audio ID to extend. Provide one of task_id, audio_id, audio_url, or upload_url.
audio_urlstringSource audio URL to extend. Provide one of task_id, audio_id, audio_url, or upload_url.
audio_weightnumberAudio weight (0-1).
Range:0 - 1
callback_urlstringWebhook URL for async notifications.
continue_atnumberSeconds into the source to continue from. Required in custom parameter mode.
instrumentalbooleanWhen true, generate without vocals.
lyricsstringExact lyrics. Only allowed when extending uploaded audio in custom parameter mode.
Bound:5000
modelstringModel slug.
negative_tagsstringStyles to avoid.
parameter_modestringInherit the source track's parameters (source) or supply custom ones (custom).
Allowed values:source, custom
persona_idstringPersona ID.
persona_typestringPersona type.
Allowed values:style, voice
promptstringExtension brief. Cannot be combined with lyrics.
Bound:5000
stylestringStyle preset. Required in custom parameter mode.
Bound:1000
style_weightnumberStyle adherence weight (0-1).
Range:0 - 1
task_idstringSource task ID to extend. Provide one of task_id, audio_id, audio_url, or upload_url.
titlestringSong title. Required in custom parameter mode.
Bound:80
upload_urlstringUploaded source audio URL to extend. Provide one of task_id, audio_id, audio_url, or upload_url.
vocal_genderstringVocal gender.
Allowed values:male, female
weirdness_constraintnumberWeirdness constraint (0-1).
Range:0 - 1
suno-v620 fields
audio_idstringSource audio ID to extend. Provide one of task_id, audio_id, audio_url, or upload_url.
audio_urlstringSource audio URL to extend. Provide one of task_id, audio_id, audio_url, or upload_url.
audio_weightnumberAudio weight (0-1).
Range:0 - 1
callback_urlstringWebhook URL for async notifications.
continue_atnumberSeconds into the source to continue from. Required in custom parameter mode.
instrumentalbooleanWhen true, generate without vocals.
lyricsstringExact lyrics. Only allowed when extending uploaded audio in custom parameter mode.
Bound:5000
modelstringModel slug.
negative_tagsstringStyles to avoid.
parameter_modestringInherit the source track's parameters (source) or supply custom ones (custom).
Allowed values:source, custom
persona_idstringPersona ID.
persona_typestringPersona type.
Allowed values:style, voice
promptstringExtension brief. Cannot be combined with lyrics.
Bound:5000
stylestringStyle preset. Required in custom parameter mode.
Bound:1000
style_weightnumberStyle adherence weight (0-1).
Range:0 - 1
task_idstringSource task ID to extend. Provide one of task_id, audio_id, audio_url, or upload_url.
titlestringSong title. Required in custom parameter mode.
Bound:80
upload_urlstringUploaded source audio URL to extend. Provide one of task_id, audio_id, audio_url, or upload_url.
vocal_genderstringVocal gender.
Allowed values:male, female
weirdness_constraintnumberWeirdness constraint (0-1).
Range:0 - 1
suno-v6-mini20 fields
audio_idstringSource audio ID to extend. Provide one of task_id, audio_id, audio_url, or upload_url.
audio_urlstringSource audio URL to extend. Provide one of task_id, audio_id, audio_url, or upload_url.
audio_weightnumberAudio weight (0-1).
Range:0 - 1
callback_urlstringWebhook URL for async notifications.
continue_atnumberSeconds into the source to continue from. Required in custom parameter mode.
instrumentalbooleanWhen true, generate without vocals.
lyricsstringExact lyrics. Only allowed when extending uploaded audio in custom parameter mode.
Bound:5000
modelstringModel slug.
negative_tagsstringStyles to avoid.
parameter_modestringInherit the source track's parameters (source) or supply custom ones (custom).
Allowed values:source, custom
persona_idstringPersona ID.
persona_typestringPersona type.
Allowed values:style, voice
promptstringExtension brief. Cannot be combined with lyrics.
Bound:5000
stylestringStyle preset. Required in custom parameter mode.
Bound:1000
style_weightnumberStyle adherence weight (0-1).
Range:0 - 1
task_idstringSource task ID to extend. Provide one of task_id, audio_id, audio_url, or upload_url.
titlestringSong title. Required in custom parameter mode.
Bound:80
upload_urlstringUploaded source audio URL to extend. Provide one of task_id, audio_id, audio_url, or upload_url.
vocal_genderstringVocal gender.
Allowed values:male, female
weirdness_constraintnumberWeirdness constraint (0-1).
Range:0 - 1
suno-v6-wild20 fields
audio_idstringSource audio ID to extend. Provide one of task_id, audio_id, audio_url, or upload_url.
audio_urlstringSource audio URL to extend. Provide one of task_id, audio_id, audio_url, or upload_url.
audio_weightnumberAudio weight (0-1).
Range:0 - 1
callback_urlstringWebhook URL for async notifications.
continue_atnumberSeconds into the source to continue from. Required in custom parameter mode.
instrumentalbooleanWhen true, generate without vocals.
lyricsstringExact lyrics. Only allowed when extending uploaded audio in custom parameter mode.
Bound:5000
modelstringModel slug.
negative_tagsstringStyles to avoid.
parameter_modestringInherit the source track's parameters (source) or supply custom ones (custom).
Allowed values:source, custom
persona_idstringPersona ID.
persona_typestringPersona type.
Allowed values:style, voice
promptstringExtension brief. Cannot be combined with lyrics.
Bound:5000
stylestringStyle preset. Required in custom parameter mode.
Bound:1000
style_weightnumberStyle adherence weight (0-1).
Range:0 - 1
task_idstringSource task ID to extend. Provide one of task_id, audio_id, audio_url, or upload_url.
titlestringSong title. Required in custom parameter mode.
Bound:80
upload_urlstringUploaded source audio URL to extend. Provide one of task_id, audio_id, audio_url, or upload_url.
vocal_genderstringVocal gender.
Allowed values:male, female
weirdness_constraintnumberWeirdness constraint (0-1).
Range:0 - 1
Create acceptance
POST /api/v1/suno/extend_music
Response schema
{
"properties": {
"billing": {
"properties": {
"refund": {
"oneOf": [
{
"properties": {
"refunded_at": {
"type": "string"
}
},
"required": [
"refunded_at"
],
"type": "object",
"unevaluatedProperties": false
},
{
"enum": [
null
]
}
]
},
"reservation": {
"oneOf": [
{
"properties": {
"amount_cents": {
"type": "integer"
}
},
"required": [
"amount_cents"
],
"type": "object",
"unevaluatedProperties": false
},
{
"enum": [
null
]
}
]
},
"settlement": {
"oneOf": [
{
"properties": {
"amount_micro_cents": {
"type": "integer"
},
"charged_amount_cents": {
"type": "integer"
}
},
"required": [
"charged_amount_cents",
"amount_micro_cents"
],
"type": "object",
"unevaluatedProperties": false
},
{
"enum": [
null
]
}
]
}
},
"required": [
"reservation",
"settlement",
"refund"
],
"type": "object",
"unevaluatedProperties": false
},
"id": {
"type": "string"
},
"status": {
"enum": [
"processing"
],
"type": "string"
},
"task_replayed": {
"type": "boolean"
}
},
"required": [
"id",
"status",
"billing"
],
"type": "object",
"unevaluatedProperties": false
}Response example
{
"billing": {
"refund": null,
"reservation": null,
"settlement": null
},
"id": "tsk_reference_demo",
"status": "processing"
}Polling processing
GET /api/v1/suno/extend_music/:id
Response schema
{
"properties": {
"audios": {
"items": {
"properties": {
"audio_url": {
"type": "string",
"x-runapi-generated-media": true
},
"duration": {
"type": "number"
},
"id": {
"type": "string"
},
"image_url": {
"type": "string",
"x-runapi-generated-media": true
},
"lyrics": {
"type": "string"
},
"model_name": {
"type": "string"
},
"stream_audio_url": {
"type": "string",
"x-runapi-generated-media": true
},
"tags": {
"items": {
"type": "string"
},
"type": "array"
},
"title": {
"type": "string"
}
},
"required": [
"id"
],
"type": "object",
"unevaluatedProperties": false
},
"type": "array"
},
"billing": {
"properties": {
"refund": {
"oneOf": [
{
"properties": {
"refunded_at": {
"type": "string"
}
},
"required": [
"refunded_at"
],
"type": "object",
"unevaluatedProperties": false
},
{
"enum": [
null
]
}
]
},
"reservation": {
"oneOf": [
{
"properties": {
"amount_cents": {
"type": "integer"
}
},
"required": [
"amount_cents"
],
"type": "object",
"unevaluatedProperties": false
},
{
"enum": [
null
]
}
]
},
"settlement": {
"oneOf": [
{
"properties": {
"amount_micro_cents": {
"type": "integer"
},
"charged_amount_cents": {
"type": "integer"
}
},
"required": [
"charged_amount_cents",
"amount_micro_cents"
],
"type": "object",
"unevaluatedProperties": false
},
{
"enum": [
null
]
}
]
}
},
"required": [
"reservation",
"settlement",
"refund"
],
"type": "object",
"unevaluatedProperties": false
},
"generation_stage": {
"enum": [
"text_generated",
"first_audio_ready"
],
"type": "string"
},
"id": {
"type": "string"
},
"status": {
"enum": [
"processing"
],
"type": "string"
}
},
"required": [
"id",
"status",
"billing"
],
"type": "object",
"unevaluatedProperties": false
}Response example
{
"billing": {
"refund": null,
"reservation": null,
"settlement": null
},
"generation_stage": "text_generated",
"id": "tsk_reference_demo",
"status": "processing"
}Polling completed
GET /api/v1/suno/extend_music/:id
Response schema
{
"properties": {
"audios": {
"items": {
"properties": {
"audio_url": {
"type": "string",
"x-runapi-generated-media": true
},
"duration": {
"type": "number"
},
"id": {
"type": "string"
},
"image_url": {
"type": "string",
"x-runapi-generated-media": true
},
"lyrics": {
"type": "string"
},
"model_name": {
"type": "string"
},
"stream_audio_url": {
"type": "string",
"x-runapi-generated-media": true
},
"tags": {
"items": {
"type": "string"
},
"type": "array"
},
"title": {
"type": "string"
}
},
"required": [
"id"
],
"type": "object",
"unevaluatedProperties": false
},
"type": "array"
},
"billing": {
"properties": {
"refund": {
"oneOf": [
{
"properties": {
"refunded_at": {
"type": "string"
}
},
"required": [
"refunded_at"
],
"type": "object",
"unevaluatedProperties": false
},
{
"enum": [
null
]
}
]
},
"reservation": {
"oneOf": [
{
"properties": {
"amount_cents": {
"type": "integer"
}
},
"required": [
"amount_cents"
],
"type": "object",
"unevaluatedProperties": false
},
{
"enum": [
null
]
}
]
},
"settlement": {
"oneOf": [
{
"properties": {
"amount_micro_cents": {
"type": "integer"
},
"charged_amount_cents": {
"type": "integer"
}
},
"required": [
"charged_amount_cents",
"amount_micro_cents"
],
"type": "object",
"unevaluatedProperties": false
},
{
"enum": [
null
]
}
]
}
},
"required": [
"reservation",
"settlement",
"refund"
],
"type": "object",
"unevaluatedProperties": false
},
"generation_stage": {
"enum": [
"text_generated",
"first_audio_ready",
"all_audios_ready",
"failed"
],
"type": "string"
},
"id": {
"type": "string"
},
"status": {
"enum": [
"completed"
],
"type": "string"
}
},
"required": [
"id",
"status",
"audios",
"billing"
],
"type": "object",
"unevaluatedProperties": false
}Response example
{
"audios": [
{
"audio_url": "https://file.runapi.ai/reference-audio.mp3",
"id": "audio_reference"
}
],
"billing": {
"refund": null,
"reservation": null,
"settlement": null
},
"id": "tsk_reference_demo",
"status": "completed"
}Polling failed
GET /api/v1/suno/extend_music/:id
Response schema
{
"properties": {
"billing": {
"properties": {
"refund": {
"oneOf": [
{
"properties": {
"refunded_at": {
"type": "string"
}
},
"required": [
"refunded_at"
],
"type": "object",
"unevaluatedProperties": false
},
{
"enum": [
null
]
}
]
},
"reservation": {
"oneOf": [
{
"properties": {
"amount_cents": {
"type": "integer"
}
},
"required": [
"amount_cents"
],
"type": "object",
"unevaluatedProperties": false
},
{
"enum": [
null
]
}
]
},
"settlement": {
"oneOf": [
{
"properties": {
"amount_micro_cents": {
"type": "integer"
},
"charged_amount_cents": {
"type": "integer"
}
},
"required": [
"charged_amount_cents",
"amount_micro_cents"
],
"type": "object",
"unevaluatedProperties": false
},
{
"enum": [
null
]
}
]
}
},
"required": [
"reservation",
"settlement",
"refund"
],
"type": "object",
"unevaluatedProperties": false
},
"error": {
"type": "string"
},
"id": {
"type": "string"
},
"status": {
"enum": [
"failed"
],
"type": "string"
}
},
"required": [
"id",
"status",
"error",
"billing"
],
"type": "object",
"unevaluatedProperties": false
}Response example
{
"billing": {
"refund": null,
"reservation": null,
"settlement": null
},
"error": "Task processing failed.",
"id": "tsk_reference_demo",
"status": "failed"
}Customer callback: processing
POST callback_url
Response schema
{
"properties": {
"audios": {
"items": {
"properties": {
"audio_url": {
"type": "string",
"x-runapi-generated-media": true
},
"duration": {
"type": "number"
},
"id": {
"type": "string"
},
"image_url": {
"type": "string",
"x-runapi-generated-media": true
},
"lyrics": {
"type": "string"
},
"model_name": {
"type": "string"
},
"stream_audio_url": {
"type": "string",
"x-runapi-generated-media": true
},
"tags": {
"items": {
"type": "string"
},
"type": "array"
},
"title": {
"type": "string"
}
},
"required": [
"id"
],
"type": "object",
"unevaluatedProperties": false
},
"type": "array"
},
"generation_stage": {
"enum": [
"text_generated",
"first_audio_ready"
],
"type": "string"
},
"id": {
"type": "string"
},
"status": {
"enum": [
"processing"
],
"type": "string"
}
},
"required": [
"id",
"status"
],
"type": "object",
"unevaluatedProperties": false
}Response example
{
"generation_stage": "text_generated",
"id": "tsk_reference_demo",
"status": "processing"
}Customer callback: completed
POST callback_url
Response schema
{
"properties": {
"audios": {
"items": {
"properties": {
"audio_url": {
"type": "string",
"x-runapi-generated-media": true
},
"duration": {
"type": "number"
},
"id": {
"type": "string"
},
"image_url": {
"type": "string",
"x-runapi-generated-media": true
},
"lyrics": {
"type": "string"
},
"model_name": {
"type": "string"
},
"stream_audio_url": {
"type": "string",
"x-runapi-generated-media": true
},
"tags": {
"items": {
"type": "string"
},
"type": "array"
},
"title": {
"type": "string"
}
},
"required": [
"id"
],
"type": "object",
"unevaluatedProperties": false
},
"type": "array"
},
"generation_stage": {
"enum": [
"text_generated",
"first_audio_ready",
"all_audios_ready",
"failed"
],
"type": "string"
},
"id": {
"type": "string"
},
"status": {
"enum": [
"completed"
],
"type": "string"
}
},
"required": [
"id",
"status",
"audios"
],
"type": "object",
"unevaluatedProperties": false
}Response example
{
"audios": [
{
"audio_url": "https://file.runapi.ai/reference-audio.mp3",
"id": "audio_reference"
}
],
"id": "tsk_reference_demo",
"status": "completed"
}Customer callback: failed
POST callback_url
Response schema
{
"properties": {
"error": {
"oneOf": [
{
"type": "string"
},
{
"properties": {
"code": {
"type": "string"
},
"limit_cents": {
"type": "integer"
},
"message": {
"type": "string"
},
"reset_at": {
"format": "date-time",
"type": [
"string",
"null"
]
},
"used_cents": {
"type": "integer"
},
"window": {
"enum": [
"1h",
"1d",
"7d",
"daily",
"weekly",
"monthly",
"lifetime"
],
"type": "string"
}
},
"required": [
"code",
"message"
],
"type": "object",
"unevaluatedProperties": false
}
]
},
"id": {
"type": "string"
},
"status": {
"enum": [
"failed"
],
"type": "string"
}
},
"required": [
"id",
"status",
"error"
],
"type": "object",
"unevaluatedProperties": false
}Response example
{
"error": {
"code": "generation_failed",
"message": "Task processing failed."
},
"id": "tsk_reference_demo",
"status": "failed"
}Errors
POST /api/v1/suno/extend_music
Response schema
{
"properties": {
"error": {
"description": "Human-readable error message.",
"type": "string"
}
},
"required": [
"error"
],
"type": "object",
"unevaluatedProperties": false
}Response example
{
"error": "Authentication required"
}Errors
GET /api/v1/suno/extend_music/:id
Response schema
{
"properties": {
"error": {
"description": "Human-readable error message.",
"type": "string"
}
},
"required": [
"error"
],
"type": "object",
"unevaluatedProperties": false
}Response example
{
"error": "Authentication required"
}Errors
POST /api/v1/suno/extend_music
Response schema
{
"oneOf": [
{
"properties": {
"error": {
"description": "Human-readable error message.",
"type": "string"
}
},
"required": [
"error"
],
"type": "object",
"unevaluatedProperties": false
},
{
"properties": {
"error": {
"description": "Human-readable validation summary.",
"type": "string"
},
"errors": {
"additionalProperties": {
"items": {
"type": "string"
},
"type": "array"
},
"description": "Validation messages keyed by public request field, with an array of human-readable strings for each field.",
"type": "object"
}
},
"required": [
"error",
"errors"
],
"type": "object",
"unevaluatedProperties": false
}
]
}Response example
{
"error": "model must be one of: suno-v4, suno-v4.5, suno-v4.5-all, suno-v4.5-plus, suno-v5, suno-v5.5, suno-v6, suno-v6-mini, suno-v6-wild"
}Errors
POST /api/v1/suno/extend_music
Response schema
{
"properties": {
"error": {
"description": "Human-readable error message.",
"type": "string"
}
},
"required": [
"error"
],
"type": "object",
"unevaluatedProperties": false
}Response example
{
"error": "Insufficient balance"
}Errors
POST /api/v1/suno/extend_music
Response schema
{
"properties": {
"error": {
"description": "Human-readable error message.",
"type": "string"
}
},
"required": [
"error"
],
"type": "object",
"unevaluatedProperties": false
}Response example
{
"error": "API key credit limit exceeded"
}Errors
POST /api/v1/suno/extend_music
Response schema
{
"properties": {
"error": {
"description": "Human-readable error message.",
"type": "string"
}
},
"required": [
"error"
],
"type": "object",
"unevaluatedProperties": false
}Response example
{
"error": "The request uses features that are not supported for the selected model"
}Errors
POST /api/v1/suno/extend_music
Response schema
{
"properties": {
"error": {
"description": "Human-readable error message.",
"type": "string"
}
},
"required": [
"error"
],
"type": "object",
"unevaluatedProperties": false
}Response example
{
"error": "Rate limit reached. Please retry later."
}Errors
POST /api/v1/suno/extend_music
Response schema
{
"properties": {
"error": {
"description": "Human-readable error message.",
"type": "string"
}
},
"required": [
"error"
],
"type": "object",
"unevaluatedProperties": false
}Response example
{
"error": "Service under maintenance, please try again later"
}Errors
POST /api/v1/suno/extend_music
Response schema
{
"properties": {
"error": {
"description": "Human-readable error message.",
"type": "string"
}
},
"required": [
"error"
],
"type": "object",
"unevaluatedProperties": false
}Response example
{
"error": "The request timed out"
}Errors
GET /api/v1/suno/extend_music/:id
Response schema
{
"properties": {
"error": {
"description": "Human-readable error message.",
"type": "string"
}
},
"required": [
"error"
],
"type": "object",
"unevaluatedProperties": false
}Response example
{
"error": "Task with id 'tsk_reference_demo' not found"
}Generated Code Samples
Use cURL directly, or install an SDK for your language. Each sample submits the validated request shown in this reference.
Install
pip install runapi-sunoimport os
from runapi.suno import SunoClient
client = SunoClient(api_key=os.environ["RUNAPI_API_KEY"])
task = client.extend_music.create(
model="suno-v5",
upload_url="https://cdn.runapi.ai/public/samples/music.mp3",
parameter_mode="custom",
instrumental=False,
prompt="Continue the arrangement with a brighter chorus.",
style="Acoustic pop with warm piano.",
title="Brighter Chorus",
continue_at=60,
persona_id="persona_reference",
persona_type="style"
)