Pixazo APIModelsAce Step
Pixazo APIModelsAce Step

Ace Step 1.5 XL API, Ace Step 1.5 API - AI Music Generation APIs

by ACE Studio

Ace Step 1.5 XL API, developers can generate high-quality custom soundtracks, background music, and audio content with ease. The API enables creators to produce professional-grade music compositions suitable for videos, games, podcasts, and multimedia projects without traditional music production expertise.

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Ace Step Music API

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Ace Step 1.5 XL Text to Song (Lyrics to Song) API Documentation

https://gateway.pixazo.ai/ace-step-xl/v1

Authentication

All requests require an API key passed via header.

HeaderTypeRequiredDescription
Ocp-Apim-Subscription-KeystringYesYour API subscription key

Submit Music Generation Request - ACE Step 1.5 XL API

Request Code

POST https://gateway.pixazo.ai/ace-step-xl/v1/generate
Content-Type: application/json
Cache-Control: no-cache
Ocp-Apim-Subscription-Key: YOUR_SUBSCRIPTION_KEY

{
  "prompt": "Uplifting pop song with acoustic guitar and bright piano",
  "lyrics": "[verse]\nWoke up to a sky painted gold\n\n[chorus]\nYou are my sunshine after the rain",
  "duration": 60
}
import requests

API_KEY = "your-api-key-here"
BASE_URL = "https://gateway.pixazo.ai/ace-step-xl/v1"

response = requests.post(
    f"{BASE_URL}/ace-step-xl/generate",
    headers={
        "Content-Type": "application/json",
        "Ocp-Apim-Subscription-Key": API_KEY
    },
    json={
  "prompt": "Uplifting pop song with acoustic guitar and bright piano",
  "lyrics": "[verse]\nWoke up to a sky painted gold\n\n[chorus]\nYou are my sunshine after the rain",
  "duration": 60
}
)

result = response.json()
print(result)
async function generateImage() {
  const response = await fetch(
    'https://gateway.pixazo.ai/ace-step-xl/v1/generate',
    {
      method: 'POST',
      headers: {
        'Content-Type': 'application/json',
        'Ocp-Apim-Subscription-Key': process.env.API_KEY
      },
      body: JSON.stringify({
        prompt: 'A peaceful village in the mountains at sunset, ACE Step XL style'
      })
    }
  );
  
  const result = await response.json();
  console.log(result);
}

generateImage();
curl -v -X POST "https://gateway.pixazo.ai/ace-step-xl/v1/generate" \
  -H "Content-Type: application/json" \
  -H "Cache-Control: no-cache" \
  -H "Ocp-Apim-Subscription-Key: YOUR_SUBSCRIPTION_KEY" \
  --data-raw '{
  "prompt": "Uplifting pop song with acoustic guitar and bright piano",
  "lyrics": "[verse]\nWoke up to a sky painted gold\n\n[chorus]\nYou are my sunshine after the rain",
  "duration": 60
}'

Output

{
  "request_id": "ace-step-xl_019dxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx",
  "status": "QUEUED",
  "polling_url": "https://gateway.pixazo.ai/v2/requests/status/ace-step-xl_019dxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx"
}

Webhook (Optional)

Add the X-Webhook-URL header to your generate request to receive a POST callback instead of polling.

X-Webhook-URL: https://your-server.com/webhook/callback

Request Parameters - Submit Music Generation Request

Parameter Required Type Description
promptYesstringGenre, instruments, mood, vocals description (e.g., "Uplifting pop song with acoustic guitar, bright piano")
lyricsNostringSong lyrics with structure tags: [verse], [chorus], [bridge], [outro]. Default: empty
durationNonumberAudio duration in seconds, max 600 (10 min). Default: 30
seedNointegerFixed seed for reproducible output. Default: -1 (random)
bpmNonumberBeats per minute. Default: auto
keyNostringMusical key (e.g., "C major", "B minor"). Default: auto
time_signatureNostringTime signature (e.g., "4/4", "3/4"). Default: auto
batch_sizeNointegerNumber of variations to generate (1-4). Default: 1
thinkingNobooleanLM "thinks" about prompt before generating for better quality. Default: false

Example Request

{
  "prompt": "Uplifting pop song with acoustic guitar, bright piano, and energetic drums. Female vocals, 120 BPM, key of C major",
  "lyrics": "[verse]\nWoke up to a sky painted gold\nSoft light dancing on my window\n\n[chorus]\nYou are my sunshine after the rain\nRunning wild through every vein",
  "duration": 180,
  "seed": 42,
  "bpm": 120,
  "key": "C major",
  "time_signature": "4/4",
  "batch_size": 4,
  "thinking": true
}

Response

{
  "request_id": "ace-step-xl_019dxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx",
  "status": "QUEUED",
  "polling_url": "https://gateway.pixazo.ai/v2/requests/status/ace-step-xl_019dxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx"
}

Request Headers

Header Value
Content-Typeapplication/json
Cache-Controlno-cache
Ocp-Apim-Subscription-KeyYOUR_SUBSCRIPTION_KEY

Response Handling

Common status codes.

CodeMeaning
202Accepted — Request queued
Bad Request
401Unauthorized
402Insufficient Balance
403Forbidden
Too Many Requests
500Internal Server Error

Error Responses

Queue system errors and model validation errors.

Queue System Errors

// 402 — Insufficient balance
{
  "error": "Insufficient Balance",
  "message": "Your wallet does not have enough balance. Required: $0.01"
}
// 400 — Model not found
{
  "error": "Model not found",
  "message": "Model 'ace-step-xl' not found or is disabled"
}

Error via Status/Webhook

{
  "request_id": "ace-step-xl_019dxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx",
  "status": "ERROR",
  "model_id": "ace-step-xl",
  "error": "Description of the error",
  "output": null
}

Retrieving Results

Poll the universal status endpoint to check progress and retrieve results.

Endpoint

GET https://gateway.pixazo.ai/v2/requests/status/{request_id}
Ocp-Apim-Subscription-Key: YOUR_API_KEY

cURL Example

curl -H "Ocp-Apim-Subscription-Key: YOUR_API_KEY" \
  "https://gateway.pixazo.ai/v2/requests/status/ace-step-xl_019d42ce-946d-7739-f812-6875c434cb790"

Response (Completed)

{
  "request_id": "ace-step-xl_019d42ce-946d-7739-f812-6875c434cb790",
  "status": "COMPLETED",
  "model_id": "ace-step-xl",
  "error": null,
  "output": {
    "media_url": [
      "https://pub-582b7213209642b9b995c96c95a30381.r2.dev/v1/ace-step-xl_019d42ce-946d-7739-f812-6875c434cb790/output_0.wav"
    ],
    "media_type": "audio/wav"
  },
  "created_at": "2026-03-31T07:32:03.749Z",
  "updated_at": "2026-03-31T07:32:20.000Z",
  "completed_at": "2026-03-31T07:32:20.000Z"
}

Response Fields

FieldTypeDescription
request_idstringUnique request identifier
statusstringQUEUED, PROCESSING, COMPLETED, FAILED, or ERROR
model_idstringModel that processed the request
errorstring|nullError message if failed
output.media_urlarrayURLs to generated media (R2 CDN)
output.media_typestringMIME type (audio/wav)
created_atstringWhen request was created
completed_atstring|nullWhen request completed
polling_urlstringStatus URL (initial response only)

Status Values

StatusDescription
QUEUEDRequest accepted, waiting to be processed
PROCESSINGBeing processed by the model
COMPLETEDDone — output contains the result
FAILEDFailed — check error field
ERRORSystem error — not charged

Status Flow

QUEUED → PROCESSING → COMPLETED
                    → FAILED
                    → ERROR

Typical Workflow

  1. Send a generate request to the API endpoint
  2. Save the request_id from the response
  3. Poll every 5-10 seconds: GET /v2/requests/status/{request_id}
  4. When status is "COMPLETED", download from output.media_url

Tip: Use X-Webhook-URL header to get a callback instead of polling.

Ace Step 1.5 XL Text to Song (Lyrics to Song) API Pricing

ResolutionPrice (USD)
Per Generation$0.015
2. Ace Step 1.5

Ace Step 1.5 Text to Song (Lyrics to Song) API Documentation

https://gateway.pixazo.ai/ace-step/v1

Authentication

All requests require an API key passed via header.

HeaderTypeRequiredDescription
Ocp-Apim-Subscription-KeystringYesYour API subscription key

Generate Music - Ace step

Request Code

POST https://gateway.pixazo.ai/ace-step/v1/generate
Content-Type: application/json
Cache-Control: no-cache
Ocp-Apim-Subscription-Key: YOUR_SUBSCRIPTION_KEY

{
  "prompt": "A cinematic Hans Zimmer style orchestral piece, building tension with heavy percussion and brass, epic atmosphere",
  "lyrics": "",
  "instrumental": true,
  "duration": 120,
  "bpm": 140,
  "infer_steps": 25,
  "guidance_scale": 7.5,
  "seed": 42
}
import requests

url = "https://gateway.pixazo.ai/ace-step/v1/generate"
headers = {
    "Content-Type": "application/json",
    "Cache-Control": "no-cache",
    "Ocp-Apim-Subscription-Key": "YOUR_SUBSCRIPTION_KEY"
}
data = {
    "prompt": "A cinematic Hans Zimmer style orchestral piece, building tension with heavy percussion and brass, epic atmosphere",
    "lyrics": "",
    "instrumental": True,
    "duration": 120,
    "bpm": 140,
    "infer_steps": 25,
    "guidance_scale": 7.5,
    "seed": 42
}

response = requests.post(url, json=data, headers=headers)
print(response.json())
const url = 'https://gateway.pixazo.ai/ace-step/v1/generate';

const data = {
  prompt: "A cinematic Hans Zimmer style orchestral piece, building tension with heavy percussion and brass, epic atmosphere",
  lyrics: "",
  instrumental: true,
  duration: 120,
  bpm: 140,
  infer_steps: 25,
  guidance_scale: 7.5,
  seed: 42
};

fetch(url, {
  method: 'POST',
  headers: {
    'Content-Type': 'application/json',
    'Cache-Control': 'no-cache',
    'Ocp-Apim-Subscription-Key': 'YOUR_SUBSCRIPTION_KEY'
  },
  body: JSON.stringify(data)
})
.then(response => response.json())
.then(data => console.log(data))
.catch(error => console.error('Error:', error));
curl -v -X POST "https://gateway.pixazo.ai/ace-step/v1/generate" \
  -H "Content-Type: application/json" \
  -H "Cache-Control: no-cache" \
  -H "Ocp-Apim-Subscription-Key: YOUR_SUBSCRIPTION_KEY" \
  --data-raw '{
    "prompt": "A cinematic Hans Zimmer style orchestral piece, building tension with heavy percussion and brass, epic atmosphere",
    "lyrics": "",
    "instrumental": true,
    "duration": 120,
    "bpm": 140,
    "infer_steps": 25,
    "guidance_scale": 7.5,
    "seed": 42
  }'

Output

{
  "request_id": "ace-step_019dxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx",
  "status": "QUEUED",
  "polling_url": "https://gateway.pixazo.ai/v2/requests/status/ace-step_019dxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx"
}

Webhook (Optional)

Add the X-Webhook-URL header to your generate request to receive a POST callback instead of polling.

X-Webhook-URL: https://your-server.com/webhook/callback

Request Parameters - Generate Music

Parameter Required Type Description
promptYesstringDescribes the overall musical style, genre, mood, instrumentation, and atmosphere.
lyricsNostringTemporal script of the song. Controls structure, sections, vocal style, instrumental breaks, and lyrical content.
instrumentalNobooleanIf true, generates instrumental-only music (no vocals).
durationNointegerTarget duration in seconds.
bpmNointegerTarget tempo in beats per minute.
infer_stepsNointegerNumber of inference steps; higher values may increase quality but take longer.
guidance_scaleNofloatControls how strongly the model follows the prompt.
seedNointegerUsed for reproducibility. Same seed and parameters produce similar outputs.

Example Request

{
  "prompt": "A cinematic Hans Zimmer style orchestral piece, building tension with heavy percussion and brass, epic atmosphere",
  "lyrics": "",
  "instrumental": true,
  "duration": 120,
  "bpm": 140,
  "infer_steps": 25,
  "guidance_scale": 7.5,
  "seed": 42
}

Response

{
  "request_id": "ace-step_019dxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx",
  "status": "QUEUED",
  "polling_url": "https://gateway.pixazo.ai/v2/requests/status/ace-step_019dxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx"
}

Request Headers

Header Value
Content-Typeapplication/json
Cache-Controlno-cache
Ocp-Apim-Subscription-KeyYOUR_SUBSCRIPTION_KEY

Response Handling

Common status codes.

CodeMeaning
202Accepted — Request queued
Bad Request
401Unauthorized
402Insufficient Balance
403Forbidden
Too Many Requests
500Internal Server Error

Error Responses

Queue system errors and model validation errors.

Queue System Errors

// 402 — Insufficient balance
{
  "error": "Insufficient Balance",
  "message": "Your wallet does not have enough balance."
}
// 400 — Model not found
{
  "error": "Model not found",
  "message": "Model 'ace-step' not found or is disabled"
}

Error via Status/Webhook

{
  "request_id": "ace-step_019dxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx",
  "status": "ERROR",
  "model_id": "ace-step",
  "error": "Description of the error",
  "output": null
}

Retrieving Results

Poll the universal status endpoint to check progress and retrieve results.

Endpoint

GET https://gateway.pixazo.ai/v2/requests/status/{request_id}
Ocp-Apim-Subscription-Key: YOUR_API_KEY

cURL Example

curl -H "Ocp-Apim-Subscription-Key: YOUR_API_KEY" \
  "https://gateway.pixazo.ai/v2/requests/status/ace-step_019dxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx"

Response (Completed)

{
  "request_id": "ace-step_019dxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx",
  "status": "COMPLETED",
  "model_id": "ace-step",
  "error": null,
  "output": {
    "media_url": [
      "https://pub-582b7213209642b9b995c96c95a30381.r2.dev/v1/ace-step_019dxxxx-xxxx/output.ext"
    ],
    "media_type": "application/octet-stream"
  },
  "created_at": "2026-03-31T10:00:00.000Z",
  "updated_at": "2026-03-31T10:00:15.000Z",
  "completed_at": "2026-03-31T10:00:15.000Z"
}

Response Fields

FieldTypeDescription
request_idstringUnique request identifier
statusstringQUEUED, PROCESSING, COMPLETED, FAILED, or ERROR
model_idstringModel that processed the request
errorstring|nullError message if failed
output.media_urlarrayURLs to generated media (R2 CDN)
output.media_typestringMIME type of the output
created_atstringWhen request was created
completed_atstring|nullWhen request completed
polling_urlstringStatus URL (initial response only)

Status Values

StatusDescription
QUEUEDRequest accepted, waiting to be processed
PROCESSINGBeing processed by the model
COMPLETEDDone — output contains the result
FAILEDFailed — check error field
ERRORSystem error — not charged

Status Flow

QUEUED → PROCESSING → COMPLETED
                    → FAILED
                    → ERROR

Typical Workflow

  1. Send a generate request to the API endpoint
  2. Save the request_id from the response
  3. Poll every 5-10 seconds: GET /v2/requests/status/{request_id}
  4. When status is "COMPLETED", download from output.media_url

Tip: Use X-Webhook-URL header to get a callback instead of polling.

Ace Step 1.5 Text to Song (Lyrics to Song) API Pricing

ResolutionPrice (USD)
All$0.01