Transcribe audio to text via OpenAI Whisper, paid per-call through Tempo MPP.
What it does
This endpoint proxies OpenAI's Whisper audio transcription model through the Tempo MPP (Micropayment Protocol) gateway at openai.mpp.tempo.xyz. It is designed to accept audio files and return text transcriptions, following the OpenAI /v1/audio/transcriptions API contract. Payment is settled in pathUSD on the Tempo L2 network.
However, during probing the endpoint returned 404 on both HEAD and GET requests, and no 402 MPP payment challenge was captured. The root domain and all documentation paths also return 404. This suggests the endpoint may not currently be live, may require a POST method with a multipart form body (as the upstream OpenAI API does), or may have been decommissioned. Without a captured payment challenge, pricing details are unknown.
Because the OpenAI transcriptions endpoint natively expects multipart/form-data POST requests with an audio file, it is plausible that HEAD/GET probes would not trigger the 402 challenge. Users should attempt a POST request with appropriate headers to confirm availability. Until confirmed, treat this listing as potentially inactive.
Capabilities
Use cases
- —Transcribing meeting recordings or interviews to text
- —Adding subtitles or captions to video content
- —Converting voice memos to searchable text
- —Building voice-driven applications that need text output
- —Automated transcription for podcast production
Fit
Best for
- —Developers needing pay-per-call audio transcription without an OpenAI API key
- —Agents that settle payments in crypto (pathUSD on Tempo L2)
- —Applications requiring on-demand Whisper transcription via a standard REST interface
Not for
- —Real-time streaming transcription (this is a batch endpoint)
- —Users who need guaranteed uptime — endpoint liveness is currently unconfirmed
- —Non-audio tasks such as text generation or image creation
Quick start
curl -X POST https://openai.mpp.tempo.xyz/v1/audio/transcriptions \
-H "Content-Type: multipart/form-data" \
-F file=@audio.mp3 \
-F model=whisper-1Example
Response
{
"text": "Hello, this is a sample transcription of the uploaded audio file."
}Endpoint
Quality
No 402 MPP challenge was captured, no documentation or schema is available, all crawled pages return 404, and pricing is unknown. The endpoint may only respond to POST with multipart form data, but this cannot be confirmed from the probe. Listing is effectively a stub.
Warnings
- —Endpoint returned 404 on HEAD and GET probes; no MPP 402 challenge captured
- —All documentation and root paths return 404 — endpoint may be offline or decommissioned
- —Pricing is completely unknown — no payment challenge was observed
- —The endpoint likely requires a POST with multipart/form-data; probe methods may not trigger the payment flow