Proprietary AI Music Engine · Differson LLC

The AI music API you can actually ship.

Generate original, studio-quality music from a single call. Built on our own models — license-clean output, an official REST API, and a fraction of the cost of grey-market wrappers.

Get API access Read the docs ↓

— Our own models— Commercial license included— Official REST API

License-clean by design

Trained on our own data — no unauthorized third-party catalog. Every track ships with a commercial license.

Official & stable

A real REST API with keys you control — not a reverse-engineered workaround that breaks when an upstream account is banned.

Genre-tuned quality

Purpose-built for Rock, Hip-Hop, Post Punk, and Indie — vocal or instrumental, at studio-quality resolution.

Priced to ship

Proprietary tech means no third-party markup — a fraction of the per-track cost of grey-market wrappers.

	Grey-market wrappers	McRock API
Official API & keys	Reverse-engineered	Official
IP & training data	Model in active litigation	Our own models
Output license	Unclear / borrowed	Commercial license
Reliability	Breaks on account bans	Stable keys you own
Per-track cost	$$	A fraction of it

API v1 — Live

McRock API

Generate AI music programmatically. Integrate McRock's engine directly into your app, game, or platform.

Base URLhttps://us-central1-mcrock-music.cloudfunctions.net

Authentication

All requests require an API key in the x-api-key header. Get your key in Settings → API Access (Enterprise plan only).

http

POST /apiV1Generate HTTP/1.1
Content-Type: application/json
x-api-key: YOUR_API_KEY

Keep your key secret. Never expose it in client-side code or public repos. Use environment variables server-side only.

Generate a Song

POST/apiV1Generate

Submits a song generation job. Returns a jobId immediately — poll /apiV1Status to track progress.

Simple mode — context in, song out.Pass a context string (user story, conversation, or any text) and McRock auto-generates the track title, lyrics, and music in one call. No need to write lyrics yourself.

Request Body

Parameter	Type	Description
`context`required	string	Any text — user story, conversation, emotions, a situation. McRock extracts a track title and writes lyrics automatically.
`genre`	string	`hiphop` `rnb` `postpunk` Default: auto-detected from context
`voiceType`	string	`"male"` `"female"` Default: male
`musicIntensity`	string	`"low"` `"medium"` `"high"` `"max"` Default: medium

Example Request

bash

curl -X POST \
  https://us-central1-mcrock-music.cloudfunctions.net/apiV1Generate \
  -H "Content-Type: application/json" \
  -H "x-api-key: YOUR_API_KEY" \
  -d '{
    "context": "I've been feeling like I don't fit in anywhere lately. Just tired of pretending.",
    "genre": "hiphop",
    "voiceType": "male",
    "musicIntensity": "high"
  }'

Response

json

{
  "jobId": "abc123def456",
  "status": "queued",
  "pollUrl": "https://us-central1-mcrock-music.cloudfunctions.net/apiV1Status?jobId=abc123def456",
  "quotaRemaining": 9517,
  "title": "Don't Fit In",
  "lyrics": "[Verse 1]\nTired of pretending, done with the game..."
}

Poll Job Status

GET/apiV1Status?jobId={jobId}

Poll this endpoint every 10 seconds until status is "complete" or "failed". The pollUrl from the generate response is the pre-built URL to call.

bash

curl \
  "https://us-central1-mcrock-music.cloudfunctions.net/apiV1Status?jobId=abc123def456" \
  -H "x-api-key: YOUR_API_KEY"

json

// Queued — job accepted, waiting for GPU slot
{ "status": "queued" }

// Generating — music is being composed
{ "status": "generating", "message": "generating" }
{ "status": "generating", "message": "mixing" }

// Encoding — longest phase, can take several minutes
{ "status": "generating", "message": "encoding audio" }

// Complete — audioUrl is a direct .wav download link (no auth required)
{
  "status": "complete",
  "audioUrl": "https://storage.googleapis.com/mcrock-music.firebasestorage.app/ace-step-temp/ace_abc123.wav"
}

// Failed
{ "status": "failed", "error": "Generation failed" }

Generation Stages

`queued`	Job accepted, waiting for a GPU slot
`generating / mixing`	Music composition in progress
`encoding audio`	Audio encoding — the longest phase, can take several minutes. Do not cancel.
`complete`	Done — audioUrl is available (.wav, Firebase Storage direct link, no expiry)

Transient polling errors are expected.

During active generation, /apiV1Status may occasionally return a non-2xx response or malformed body. This is normal — treat it as generating and continue polling. Only abort after 5 or more consecutive errors.

Timing: Total generation is typically 3–5 minutes, but can reach 8–10 minutes for longer tracks (the encoding audio phase is the variable). Set your client timeout to at least 12 minutes to avoid aborting a healthy job.

Error Codes

Status	Error	Meaning
401	`Missing x-api-key header`	x-api-key header not present in request
401	`Invalid or revoked API key`	Key is incorrect, expired, or was revoked
403	`API access requires Enterprise plan`	Your account is not on the Enterprise plan
429	`Monthly quota exceeded`	You have used all 10,000 songs this billing cycle
400	`lyrics and title are required`	Request body missing required fields
405	`POST only`	Use POST method, not GET or others
502	`Engine unreachable`	Generation backend temporarily unavailable — retry
500	`Generation timed out`	Song generation took too long — retry the request

Limits

10,000

Monthly Songs

Enterprise plan — resets each billing cycle

3–10 min

Generation Time

Typical 3–5 min; encoding phase can extend to 10 min

10s

Poll Interval

Recommended — abort only after 5+ consecutive errors

12 min

Client Timeout

Minimum recommended before giving up on a job

Ready to integrate?

Your API key is in Settings on the Enterprise plan.

View my API key →Get Enterprise plan