Pay-per-use AI audio transcription API
Pay-per-use AI audio transcription API. Transcribe short MP3 and WAV audio files using Whisper Large V3 Turbo. No account or API key required. Pay with USDC on Base. 0.02 USDC per request. Maximum 120 seconds and 2 MB; MP3 and uncompressed PCM WAV only. Returns JSON: text, detected language, duration and timestamped segments. Charged only when a transcript is returned.
Answeringour last check, 2026-10-18
1 of 1checks answered this week
1140 msmedian answer time
$0.02listed price per call
$0.02price it asked us
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
GET https://x402-transcribe-mainnet.hustlescan-media.workers.dev/api/transcribe
| Category | Image and media |
|---|---|
| Provider host | x402-transcribe-mainnet.hustlescan-media.workers.dev |
| Networks | eip155:8453 |
| Payment schemes | exact |
| Self-reported calls, 30 days | 2 from 1 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-10-18 | valid payment request | 402 | $0.02 | 1140 ms |
Example input (from the provider)
{
"method": "GET",
"queryParams": {
"url": "https://raw.githubusercontent.com/ggml-org/whisper.cpp/master/samples/jfk.wav"
},
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"properties": {
"url": {
"description": "Direct https:// link to an MP3 or uncompressed PCM WAV file: at most 2 MB and 120 seconds. No credentials, IP addresses or custom ports in the URL.",
"maxLength": 2048,
"pattern": "^https://",
"type": "string"
}
},
"required": [
"url"
],
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"duration_seconds": {
"type": "number"
},
"language": {
"description": "ISO 639-1 code where known",
"type": "string"
},
"segments": {
"items": {
"properties": {
"end": {
"type": "number"
},
"start": {
"type": "number"
},
"text": {
"type": "string"
}
},
"required": [
"start",
"end",
"text"
],
"type": "object"
},
"type": "array"
},
"success": {
"type": "boolean"
},
"text": {
"type": "string"
}
},
"required": [
"success",
"text"
],
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}