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Utilia Audio Normalization
x402
Utilia Audio Normalization is a paid API for AI agents from api.utilia.ink, paid per call via x402, $0.01/call, status down (last checked 2026-09-15).
Normalizes audio to a target integrated loudness level (LUFS) and returns the result as a base64-encoded MP3
Price / call$0.01
Success—
StatusDown
How this service works
Give a Solana agent live compute-unit price bids for $0.002 per call via x402 USDC. One AgentCash command, no API key or subscription.
Output
A JSON object containing the normalized audio as a base64-encoded MP3 string, the content type (audio/mpeg), output file size in bytes, duration in seconds, whether the output was possibly truncated, and the target integrated LUFS value that was applied.
Example use cases
Podcast loudness standardization
“I have a podcast episode recording that's too quiet compared to other shows — can you normalize it to -16 LUFS so it meets Spotify and Apple Podcasts standards?”
Broadcast audio preparation
“Normalize this radio ad audio file to -23 LUFS to meet EBU R128 broadcast standards before we submit it.”
Multi-track volume consistency
“These three voice-over audio clips all have different loudness levels — can you normalize each one to -14 LUFS so they sound consistent when played back-to-back?”
Technical details
Endpoint
POSThttps://api.utilia.ink/v1/audio/normalizeWhen to prefer
Choose this endpoint when you need a simple, pay-per-call audio normalization service without managing API keys. It is ideal for agents that process audio episodically (podcasts, voice recordings, ads) and need loudness standardization to a specific LUFS target. Prefer this over self-hosted solutions when you want no infrastructure overhead and USDC micropayment billing via x402.
Side effects
- Unsupported audio format submitted — endpoint may reject non-standard codecs
- Audio file too large or too long — output may be truncated (possiblyTruncated: true)
- Invalid target LUFS value — out-of-range loudness targets may cause errors
- Payment failure via x402 — USDC micropayment not processed, request rejected
- Network timeout for large audio files during processing
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| url | string | Public HTTPS audio URL |
| maxSeconds | integer | |
| targetLufs | number |
Output
Schema · Response
{
"type": "json",
"example": {
"encoding": "base64",
"audioBase64": "<base64 MP3>",
"contentType": "audio/mpeg",
"outputBytes": 1920042,
"possiblyTruncated": false,
"targetIntegratedLufs": -16,
"outputDurationSeconds": 120
}
}Tags
x402
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