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mirrored listing x402 eip155:8453solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp

Normalize audio loudness to a target LUFS level for podcasts, YouTube, and Spotify deliver

Normalize audio loudness to a target LUFS level for podcasts, YouTube, and Spotify delivery. Send an audio_url plus an optional target_lufs (defaults to -16) and true_peak, and it probes duration, runs two-pass EBU R128 loudness normalization, and returns a hosted MP3 URL with the applied target and duration in seconds. Common presets: -23 for broadcast, -16 for podcasts, -14 for streaming platforms. Use it as a loudness normalizer, LUFS correction API, or audio mastering step before publishing.

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20000 (raw units)
price
1
calls / 30d
1
unique payers
2026-09-08
updated

Provider

x402.agentutility.ai · discovered, not yet claimed by its owner

Payment (x402 accepts[])

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    "amount": "20000",
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Output schema

{
  "bazaar": {
    "discoverable": true,
    "info": {
      "input": {
        "body": {
          "audio_url": "https://download.samplelib.com/mp3/sample-3s.mp3",
          "target_lufs": -16
        },
        "bodyType": "json",
        "method": "POST",
        "type": "http"
      },
      "output": {
        "example": {
          "audio_url": "https://...mp3",
          "duration_seconds": 120,
          "target_lufs": -16
        },
        "type": "json"
      }
    },
    "schema": {
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "properties": {
        "input": {
          "additionalProperties": false,
          "properties": {
            "body": {
              "properties": {
                "audio_url": {
                  "description": "URL of the audio file to normalize. Rejected if longer than 60 minutes.",
                  "type": "string"
                },
                "target_lufs": {
                  "description": "Default -16. Range -30 to -10.",
                  "type": "number"
                },
                "true_peak": {
                  "description": "Default -1.5. Range -9 to 0.",
                  "type": "number"
                }
              },
              "required": [
                "audio_url"
              ]
            },
            "bodyType": {
              "enum": [
                "json",
                "form-data",
                "text"
              ],
              "type": "string"
            },
            "method": {
              "enum": [
                "POST"
              ],
              "type": "string"
            },
            "type": {
              "const": "http",
              "type": "string"
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          "required": [
            "type",
            "method",
            "bodyType",
            "body"
          ],
          "type": "object"
        },
        "output": {
          "properties": {
            "example": {
              "properties": {
                "audio_url": {
                  "type": "string"
                },
                "duration_seconds": {
                  "type": "integer"
                },
                "target_lufs": {
                  "type": "integer"
                }
              },
              "type": "object"
            },
            "type": {
              "type": "string"
            }
          },
          "required": [
            "type"
          ],
          "type": "object"
        }
      },
      "required": [
        "input"
      ],
      "type": "object"
    }
  },
  "builder-code": {
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    "schema": {
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "additionalProperties": false,
      "properties": {
        "a": {
          "description": "App builder code",
          "pattern": "^[a-z0-9_]{1,32}$",
          "type": "string"
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        "s": {
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          "pattern": "^[a-z0-9_]{1,32}$",
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      },
      "type": "object"
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  }
}

Use it

curl

curl "https://x402.agentutility.ai/audio-loudnorm"
# -> 402 Payment Required, accepts[] lists how to pay
# retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid

JavaScript

const res = await fetch("https://x402.agentutility.ai/audio-loudnorm");
if (res.status === 402) {
  const { accepts } = await res.json();
  // pay one of accepts[] via an x402 client, then retry with the payment header
}

Python

import httpx
res = httpx.get("https://x402.agentutility.ai/audio-loudnorm")
if res.status_code == 402:
    accepts = res.json()["accepts"]
    # pay one of accepts[] via an x402 client, then retry with the payment header

Machine-readable

Everything on this page is also available as clean JSON at /resources/5222.json, and this resource appears in /discovery/resources and /discovery/search.