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BlockRun Audio Generation
x402
BlockRun Audio Generation is a paid API for AI agents from blockrun.ai, paid per call via x402, $0.105/call, status unknown (last checked 2026-09-15).
Generates AI music tracks from a text prompt and optional lyrics, with configurable duration and instrumental mode, billed per-call in USDC.
Price / call$0.105
Success—
StatusUnknown
How this service works
Pay for the outcome. One endpoint for every model, tool and data source an agent needs — each call priced before it runs, at the best value per dollar. 103 models and 100 data and tool APIs.
Output
An AI-generated audio file (music track) matching the requested style, lyrics, and duration. The call is billed at $0.105 USDC per generation, settled on Base or Solana.
Example use cases
Example prompt
“Generate a 60-second upbeat electronic instrumental track with a futuristic synthwave vibe — no vocals, just pure background music for a product demo video.”
Technical details
Endpoint
POSThttps://blockrun.ai/api/v1/audio/generationsWhen to prefer
Choose this endpoint when you need pay-per-call AI music generation without managing API keys, and want settlement in USDC on Base or Solana. Ideal for agents that need to generate music tracks on demand from style prompts or lyrics, especially within a crypto-native or x402-compatible payment workflow.
Side effects
- Invalid or unsupported model ID returns an error
- Duration outside the 5–240 second range is rejected
- Missing required prompt field causes a validation error
- Insufficient USDC balance or failed x402 payment results in 402 Payment Required
- Overly long or malformed lyrics may cause generation failure
Input
{
"model": "minimax/music-2.5+",
"prompt": "upbeat electronic dance music with synthesizers",
"instrumental": true,
"duration_seconds": 30
}Schema · Request body
| Field | Type | Description |
|---|---|---|
| model | string | Audio model ID (e.g., minimax/music-2.5+) |
| lyrics | string | Optional lyrics for the track |
| prompt | string | Music style or description prompt |
| instrumental | boolean | Generate instrumental (no vocals) |
| duration_seconds | integer | Target duration in seconds (5-240, default 30) |
Output
{
"data": [
{
"url": "https://minimax-algeng-chat-tts-us.oss-us-east-1.aliyuncs.com/music%2Fprod%2Ftts-20260612130250-NeirSDEMsOHsARsJ.mp3?Expires=1781326974&OSSAccessKeyId=LTAI5tCpJNKCf5EkQHSuL9xg&Signature=qSipNy7vdOc0h0aGFwVML87UpFQ%3D",
"duration_seconds": 158
}
],
"model": "minimax/music-2.5+",
"created": 1781240575
}Tags
x402
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