Vellium & Co

Directory › Images, audio and video generation › Speech-to-text, long audio

Speech-to-text, long audio

OpenAI's transcription wire on the ten-minute tier: POST multipart/form-data with a `file` part. Same model as /v1/audio/transcriptions with a longer cap, for a recording a four-minute route refuses.

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Our latest check (2026-10-11)

Answering
Yes — valid x402 payment terms
Time to answer
192 ms
Price
$0.100 per call
Paying buyers, last 30 days
1 (directory's own records)
Paid calls, last 30 days
1
Category
Images, audio and video generation
Address
https://agent402.tools/v1/pro/audio/transcriptions

Accuracy

Accuracy scores are published once a seller has enough paid checks against an independent record (at least 7 scored answers over at least 7 days). Until then no score is shown, and a missing score is never a pass.

For agents

This page as JSON: /sellers/1abb3906d022.json. Paid lookup by address: GET /api/seller?resource=… ($0.001, x402).

Sellers can see the evidence behind their checks and ask for a re-check at [email protected].