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fastapi.online — Transcribe & Translate Audio
x402
fastapi.online — Transcribe & Translate Audio is a paid API for AI agents from api.fastapi.online, paid per call via x402, $0.006/call, status unknown (last checked 2026-09-15).
Transcribes an audio file to text and translates the transcript into a specified target language in a single call
Price / call$0.006
Success—
StatusUnknown
How this service works
Chat, embeddings, OCR, speech-to-text, image editing, image understanding (captioning/Q&A), text-to-speech, translation, writing tools, classification tools, developer tools, local utilities, format/checksum validators, encoding & crypto utilities, date/time calculators, geo/coordinate math, math & finance calculators, novelty tools, and business/social writing generators — 179 endpoints in all, across multiple specialized self-hosted models. Pay per call with crypto — no signup — or get an API key.
Output
A translated transcript of the audio file, where the speech has been first transcribed from the audio and then translated into the requested target language. The response likely contains the translated text as a string or JSON object.
Example use cases
Multilingual meeting notes
“I have a WAV recording of a meeting conducted in French — can you transcribe it and translate everything into English so my team can read it?”
Podcast localization for Spanish audience
“Take this MP3 podcast episode and give me the full transcript translated into Spanish so I can publish subtitles for Spanish-speaking listeners.”
Foreign language voicemail translation
“I got a voicemail in Japanese — can you transcribe it and translate it into English so I can understand what was said?”
Technical details
Endpoint
POSThttps://api.fastapi.online/transcribe-translateWhen to prefer
Choose this endpoint when you need both transcription and translation in a single API call with no signup required. It is ideal for pay-per-use workflows where you want to avoid subscriptions, and when you need to handle audio in one language and output text in another. Prefer it over chaining separate transcription and translation APIs for simplicity and cost efficiency at $0.006 per call.
Side effects
- Unsupported audio format — only WAV, MP3, OGG and similar formats are accepted
- Missing or unrecognized target language code causes translation failure
- Audio file too large or too long may time out or be rejected
- Payment not fulfilled results in HTTP 402 response
- Poor audio quality may yield inaccurate transcription and therefore inaccurate translation
- Ambiguous language name may not resolve to the expected locale
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| file | string | Audio file (WAV/MP3/OGG/etc) |
| target_lang | string | Language to translate the transcript into, e.g. Spanish |
Tags
x402
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