Returns measured evidence about a recording, not a verdict on it
Returns measured evidence about a recording, not a verdict on it. The spectral cut-off says which lossy stages the file has already been through, since every encoder discards everything above its own ceiling. The room tone measurement compares the noise floor across the silent stretches: a microphone in a room produces a floor that differs between pauses, and a level identical to the hundredth of a decibel across every pause means the silence was inserted rather than recorded.
Paid test badge: not yet. The checks above are free: we call the tool without paying and read the payment request it sends back. The Verified badge needs paid calls whose answers match the promised output, and nobody can buy a badge.
Endpoint
POST https://audio.halowerk.com/voice-evidence
| Category | Image and media |
|---|---|
| Provider host | audio.halowerk.com |
| Networks | eip155:8453 |
| Payment schemes | exact |
| Self-reported calls, 30 days | 2 from 2 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-09-24 | valid payment request | 402 | $0.006 | 893 ms |
Example input (from the provider)
{
"body": {
"audio": {
"url": "https://audio.halowerk.com/examples/voice.wav"
}
},
"bodyType": "json",
"method": "POST",
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"additionalProperties": false,
"properties": {
"audio": {
"additionalProperties": false,
"description": "The recording. Either url or content_base64, not both.",
"properties": {
"content_base64": {
"description": "The file inline, base64. A data: prefix is accepted.",
"maxLength": 12000000,
"type": "string"
},
"url": {
"description": "Public http(s) URL of the audio file. Private and local addresses are refused.",
"maxLength": 2048,
"type": "string"
}
},
"type": "object"
},
"silence_threshold_db": {
"default": -35,
"description": "Level below which a stretch counts as a pause, for the room tone measurement.",
"maximum": -20,
"minimum": -70,
"type": "integer"
}
},
"required": [
"audio"
],
"type": "object"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
},
"method": {
"enum": [
"POST",
"PUT",
"PATCH"
],
"type": "string"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method",
"bodyType",
"body"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}