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Onchain Router – Audio Transcription (Speech-to-Text)
x402
Onchain Router – Audio Transcription (Speech-to-Text) is a paid API for AI agents from llm.agenticfi.wtf, paid per call via x402, $0.002/call, status down (last checked 2026-09-15).
Transcribes audio files to text via a provider-neutral API, billed per call in USDC with an onchain payment receipt.
Price / call$0.002
Success—
StatusDown
How this service works
Speech-to-text transcription · one locally validated audio upload · 0% service fee launch promotion
Output
Returns a JSON object containing a unique transcription ID (e.g. 'trns_example'), the full transcribed text string, the model used (e.g. 'elevenlabs/scribe-v2'), and usage stats including input audio duration in milliseconds. Payment is settled in USDC onchain and a durable receipt is issued.
Example use cases
Meeting recording transcription
“Transcribe this 10-minute meeting recording for me and give me the full text so I can turn it into meeting notes — pay with USDC and get me the receipt.”
Podcast episode archival
“I have an audio file of today's podcast episode — can you convert the speech to text so I can publish a transcript on the website? Use the onchain router and pay in USDC.”
Multilingual voice note conversion
“Transcribe this voice note I recorded into written text. I want to use ElevenLabs scribe through the provider-neutral router and have the payment handled in USDC.”
Technical details
Endpoint
POSThttps://llm.agenticfi.wtf/v1/audio/transcriptionsWhen to prefer
Choose this endpoint when you need audio-to-text transcription and want to pay per call in USDC with an onchain receipt, rather than managing a subscription or API key with a traditional provider. Ideal for agents that need auditability of AI spend via blockchain receipts, or when operating in a crypto-native payment context. The 0% service fee launch promotion makes it cost-competitive with direct provider access.
Side effects
- Unsupported audio format or corrupt file returns an error
- Audio file too long or too large exceeds processing limits
- Insufficient USDC balance causes payment failure before transcription
- Network or provider outage returns 5xx error
- Empty or silent audio file may return empty text or low-confidence result
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| model | string | |
| file_format | string | |
| audio_base64 | string | Canonical RFC 4648 Base64 audio without a data-URL prefix or whitespace. |
| response_format | string |
Output
Schema · Response
{
"type": "json",
"example": {
"id": "trns_example",
"text": "Transcribed speech.",
"model": "elevenlabs/scribe-v2",
"usage": {
"input_audio_ms": 3100
}
}
}Tags
x402
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