{"uid":"cap_IgoTGfGyTHrVjkXD-h_L9","slug":"speech-to-text-transcription-whisper-large-v3-turbo-93729a38","name":"Speech-to-Text Transcription (Whisper Large v3 Turbo)","description":"Transcribes an audio file with Whisper large v3 turbo: pass an https URL (mp3, wav, flac, m4a, ogg, up to 10 MB) or base64 audio in a POST. Returns the text, the detected language with its probability, the duration, and timed segments; add words=true for word-level timestamps. Around 100 languages. You are only charged if the transcript is delivered. No API key, no account.","url":"https://flat-rate-llm.kikoribera03.workers.dev/v1/ai/transcribe?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET"],"type":"string"},"queryParams":{"type":"object","required":[],"properties":{"url":{"type":"string","description":"https URL of the audio file, up to 10 MB."},"audio":{"type":"string","description":"Alternative to url: the audio as base64 (POST only)."},"words":{"type":"boolean","description":"Include word-level timestamps. Default false."},"language":{"type":"string","description":"Optional ISO code to skip detection, e.g. es."}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.02","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":2,"rating":{"score":"0.79","successRate":"1.00","reviews":2,"stars":"4.2","state":"rated"},"availabilityStatus":"healthy","priceObserved":{"p10Cents":"2.0000","medianCents":"2.0000","p90Cents":"2.0000","minCents":"2.0000","maxCents":"2.0000","p95Cents":"2.0000","sampleCount":9,"varies":false,"failureChargeRate":null},"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.02/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.02","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.02","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_MzPJYgjm7PsMBWyZYDrh6","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.02","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Transcribes audio files to text using Whisper large v3 turbo, returning the transcript, detected language, duration, and timed segments with optional word-level timestamps.","exampleAgentPrompt":"Can you transcribe this audio recording for me — here's the URL: https://example.com/meeting.mp3 — and include word-level timestamps so I can see exactly when each word was spoken?","exampleUseCases":[{"title":"Podcast episode auto-transcription","prompt":"Transcribe this podcast episode for me — the MP3 is at https://example.com/episode42.mp3 — and give me the full text plus the detected language so I can publish it as show notes."},{"title":"Multilingual voicemail to text","prompt":"I have a voicemail recording at https://example.com/voicemail.wav that might be in Spanish or Portuguese — can you transcribe it and tell me which language it is and how confident you are?"},{"title":"Meeting recording with timed captions","prompt":"Turn this meeting recording into a transcript with word-level timestamps — the file is at https://example.com/standup.m4a — I need the segments so I can build a searchable caption file."}],"resultDescription":"Returns a JSON object containing the full transcript text, the detected language code (e.g. 'en', 'es') with a confidence probability, the total audio duration in seconds, an array of timed segments each with start/end times and segment text, and optionally word-level timestamps for each word when words=true is requested.","failureModes":["Audio file URL not accessible or returns non-200 status — transcription fails with an error","File exceeds 10 MB limit — request rejected","Unsupported audio format provided — returns format error","Network timeout fetching remote audio URL — transcription fails","Very low audio quality or silence — returns empty or inaccurate transcript","Language detection confidence may be low for very short or noisy clips"],"whenToPreferThis":"Choose this endpoint when you need fast, affordable audio transcription without account setup or API keys, supporting ~100 languages with timed segment output and optional word-level timestamps. Ideal for agents that need to process one audio file at a time via URL or base64, at $0.01 per call with no subscription overhead. Prefer over self-hosted Whisper when you want zero infrastructure, or over larger providers when cost and simplicity matter.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":9,"lastUsedAt":"2026-10-22T10:10:20.904Z","lastSuccessfullyRanAt":"2026-10-22T10:10:20.904Z","lastHealthCheckAt":"2026-10-29T18:31:24.049Z","isFirstParty":false,"canonicalSlug":"speech-to-text-transcription-whisper-large-v3-turbo-93729a38"}