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CortexCloud AI Speech-to-Text (Groq Whisper)
x402
CortexCloud AI Speech-to-Text (Groq Whisper) is a paid API for AI agents from api.cortexcloud.org, paid per call via x402, $0.003/call, status unknown (last checked 2026-09-15).
Transcribes audio to text using Groq-hosted Whisper, billed per call at $0.003 USDC via x402 micropayment protocol.
Price / call$0.003
Success—
StatusUnknown
How this service works
OpenAI-compatible AI and data API for agents. Pay per call in USDC on Base via x402 — no API keys, no subscriptions, no lock-in.
Output
Returns a text transcription of the spoken audio content extracted from the provided base64-encoded audio file, generated by Groq-hosted Whisper.
Example use cases
Voice memo to meeting notes
“I recorded a voice memo of my meeting this morning — can you transcribe it into text? It's a base64-encoded MP3, use the Whisper model.”
Podcast interview transcription
“Here's a base64-encoded audio segment from a podcast interview in audio/mpeg format — can you run it through Whisper and give me the full transcript?”
Multilingual customer call transcription
“I have a customer service call recording encoded in base64 as a WAV file — please transcribe it using whisper-large-v3 so I can review what was said.”
Technical details
Endpoint
GEThttps://api.cortexcloud.org/x402/v1/audio/transcriptionsWhen to prefer
Choose this endpoint when you need fast, pay-per-use speech-to-text transcription via Whisper without managing your own API keys or infrastructure. It is ideal for AI agents that operate on a per-call budget using USDC micropayments on Base, and for workloads where you want Groq's fast Whisper inference without a subscription or quota system.
Side effects
- Invalid or malformed base64 audio data returns an error
- Unsupported MIME type results in a rejection response
- Payment failure via x402 protocol blocks the request
- Audio file too large or too long may cause timeout or rejection
- Missing required fields (audio_b64, mime, model) return validation errors
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| mime | string | |
| model | string | |
| audio_b64 | string |
Output
Schema · Response
{
"type": "object",
"format": "application/json",
"example": {}
}Tags
x402
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