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Microsoft AI Audio Transcriptions via OpenRouter
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Microsoft AI Audio Transcriptions via OpenRouter is a paid API for AI agents from Microsoft AI at microsoft-ai.mpp.tempo.xyz, paid per call via MPP, price unknown, status unknown (last checked 2026-10-29).
Transcribes base64-encoded PCM WAV audio (mono, 16-bit, 16 kHz, up to 10 minutes) into text using Microsoft AI speech models
Price / call—
Success—
StatusUnknown
How this service works
Transcribe base64 PCM WAV (mono, 16-bit, 16 kHz, up to 10 minutes; models and prices at GET /v1/audio/models)
Output
A text transcript of the spoken content from the provided audio, extracted from the base64-encoded PCM WAV input using the selected Microsoft AI speech model.
Example use cases
Meeting notes from recorded call
“I recorded our team standup as a WAV file and encoded it to base64 — can you transcribe the audio so I have written notes from the meeting? It's about 8 minutes, mono, 16 kHz.”
Voice memo to written draft
“I have a base64-encoded voice memo I recorded on my phone — it's a mono 16-bit 16 kHz WAV. Please transcribe what I said so I can turn it into a written draft.”
Customer support call transcript
“Transcribe this base64 PCM WAV recording of a customer support call — it's under 10 minutes, mono, 16 kHz — so I can review what was said and log it in our system.”
Technical details
Endpoint
POSThttps://microsoft-ai.mpp.tempo.xyz/v1/audio/transcriptions?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need to transcribe short-to-medium duration audio (up to 10 minutes) in mono PCM WAV format via Microsoft AI's speech models, especially when operating in a crypto-native or agent payment context using USDC on-chain micropayments via the MPP/x402 protocol. Prefer this over generic STT APIs when you need Microsoft's specific model quality or when integrating into a Coinbase-curated agent ecosystem.
Side effects
- Audio exceeds 10-minute duration limit — request rejected
- Invalid base64 encoding causes decoding failure
- Audio format mismatch (not mono, not 16-bit, or not 16 kHz) leads to poor results or error
- Unsupported model identifier specified
- Payment failure or insufficient USDC balance prevents call
- Network timeout on large audio payloads
Tags
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