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Type a vibe, get a track. Your agent turns a one-line brief into a rich music prompt with Claude, then pays Stable Audio 2.5 to render the actual audio — a real, commercial-use .wav you can play and sell. ~$0.42, no API keys, no subscriptions.
This recipe is the creation half of the Audric Store demo “Make me a lo-fi beat called Midnight Rain and sell it for $5.” The store half — persisting to Walrus, capping supply, and the 92%-to-creator USDC sale — lands with Audric Store.Why pay for a model when a capable client could DIY? An agent with a code sandbox (e.g. Claude Desktop) can synthesize a basic beat with numpy/ffmpeg for free — and will, if you let it. But that’s a hand-built waveform, not generative music. When the point is a real, sellable track (“AI made the music”), you want a generative model — that’s what MPP buys here. For clients without a code sandbox (a browser/zkLogin app like Audric), the model endpoint is the only path. Phrase the prompt to ask for model generation when quality matters.

The prompt

Use Stable Audio to generate a mellow lo-fi beat called "Midnight Rain" —
rainy-night vibe, ~30 seconds. Give me the audio to play.

What runs

  1. POST /anthropic/v1/messages — Claude turns the brief into a vivid music prompt (~$0.02)
  2. POST /fal/fal-ai/stable-audio-25/text-to-audio — Stable Audio 2.5 renders the track (~$0.40)

Run it

Claude Desktop (MCP)

npm install -g @t2000/cli && t2 init && t2 receive && t2 mcp install
Paste the prompt. Naming Stable Audio explicitly steers the agent to the model instead of synthesizing a waveform itself.

SDK

import { T2000 } from '@t2000/sdk';
import { writeFileSync } from 'fs';

const agent = await T2000.create();
const brief = 'A mellow lo-fi hip-hop beat called "Midnight Rain", rainy-night mood, ~75 BPM';

// 1. Claude expands the brief into a richer music prompt.
const promptGen = await agent.pay({
  url: 'https://mpp.t2000.ai/anthropic/v1/messages',
  method: 'POST',
  headers: { 'anthropic-version': '2023-06-01' },
  body: JSON.stringify({
    model: 'claude-sonnet-4-5',
    max_tokens: 150,
    messages: [{
      role: 'user',
      content: `Write a single vivid text-to-music prompt (instruments, tempo, mood) for: ${brief}. Output ONLY the prompt.`,
    }],
  }),
});
const musicPrompt = (promptGen.body as { content: { text: string }[] }).content[0].text.trim();

// 2. Render with Stable Audio 2.5 — returns a hosted audio URL.
const track = await agent.pay({
  url: 'https://mpp.t2000.ai/fal/fal-ai/stable-audio-25/text-to-audio',
  method: 'POST',
  body: JSON.stringify({ prompt: musicPrompt, seconds_total: 30 }),
});

const { audio } = track.body as { audio: string };
const wav = await fetch(audio).then((res) => res.arrayBuffer());
writeFileSync('./midnight-rain.wav', Buffer.from(wav));
console.log('Track:', audio);

Expected output

2 calls · ~$0.42 · ~10s · 0 taps
./midnight-rain.wav  (commercial-use, hosted)

Extend it

  • Need a cheaper take? MusicGen via Replicate (/replicate/v1/predictions, $0.04) runs the open MusicGen model — pass its version + { prompt, duration } and poll /replicate/v1/predictions/status for long renders
  • Chain fal.ai Flux (/fal/fal-ai/flux/dev) for matching cover art and ElevenLabs (/elevenlabs/v1/text-to-speech/:voiceId) for a spoken intro
  • Persist the track + cover to Walrus and mint it for sale — that’s the upcoming Audric Store flow (creation → storage → capped USDC sale, 92% to the creator)