# Sift Audio Analyze

> Sift Audio Analyze is a paid API for AI agents from sift.srv1996466.hstgr.cloud, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-23).

Analyzes an audio file URL for integrated loudness (LUFS), true peak, loudness range, and per-target gain recommendations (podcast, streaming, broadcast)

## Facts

- Endpoint: GET https://sift.srv1996466.hstgr.cloud/v1/audio/analyze?utm_source=zero.xyz
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-23
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/sift-audio-analyze-824a2d7e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_8CQ2GLY3Ej7YMVJXK_Adx

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability sift-audio-analyze-824a2d7e
```

Example prompt: Can you analyze the loudness of this audio file — https://example.com/episode42.mp3 — and tell me the integrated LUFS, true peak, and how much gain I'd need to hit podcast and streaming targets?

## When to prefer this

Use this endpoint when you need objective loudness measurements (LUFS, true peak, LR) and actionable per-platform gain recommendations for an audio file accessible via URL, without needing to normalize the file itself — pair with /v1/audio/normalize when you need the actual corrected file.

## Known failure modes

- Unreachable or invalid audio URL returns an error — ensure the URL is publicly accessible
- Non-audio file URL (e.g. HTML page) returns a format error
- Very large audio files may time out — use direct CDN links rather than redirect chains
- Corrupt or unsupported codec files return a decoding error

## How this service works

Measure audio loudness (EBU R 128 LUFS, true peak, loudness range). Two-pass EBU R 128 measurement of any audio or video file URL (up to 100 MB, 30 min): integrated LUFS, true peak, loudness range, and the gain needed for 11 named delivery targets.

## Output

Returns a JSON object with integrated_lufs (overall loudness in LUFS), true_peak_dbtp (maximum true peak in dBTP), loudness_range_lu (dynamic range in LU), and a targets object with per-platform entries (e.g. podcast, streaming, broadcast) each containing the target LUFS level and the gain_needed_db to reach it.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "url"
     ],
     "properties": {
      "url": {
       "type": "string",
       "description": "Audio or video file URL"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "targets": {
   "podcast": {
    "lufs": -16,
    "gain_needed_db": 10.1
   }
  },
  "true_peak_dbtp": -8.3,
  "integrated_lufs": -26.1,
  "loudness_range_lu": 0
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/sift-audio-analyze-824a2d7e/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from sift.srv1996466.hstgr.cloud](https://www.zero.xyz/host/sift.srv1996466.hstgr.cloud/llms.txt)