{"uid":"cap_6fJ9J0UVP1oF5z7z2JELk","slug":"sitecheck-api-speech-to-text-transcription-add41a34","name":"SiteCheck API – Speech-to-Text Transcription","description":"Pay-per-call tools for AI agents: image generation, speech-to-text, text-to-speech, embeddings, LLM chat, website audits and contact enrichment. Plus prediction-market search, briefs, quotes and unsigned buy transactions, powered by Panta. Payment: x402, USDC on Base, Solana or Arc. No signup, no API key.","url":"https://api.sitecheck-api.workers.dev/api/transcribe?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"url":{"type":"string","description":"https URL of an audio file (mp3, wav, m4a...)"},"language":{"type":"string","description":"Optional ISO code, e.g. en"},"audio_base64":{"type":"string","description":"Alternative to url"}}},"responseSchema":{"type":"json","example":{"text":"Hello and welcome...","model":"@cf/openai/whisper-large-v3-turbo","duration":42.1,"language":"en","segments":[{"end":3.2,"text":"Hello and welcome","start":0}]}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.01","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.01/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm__FRP-vFhJsXk9pMUcM8xv","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.01","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Transcribes audio files (via URL or base64) into text with timestamps, language detection, and segment-level detail using Whisper Large v3 Turbo","exampleAgentPrompt":"Can you transcribe this audio file for me? Here's the URL: https://example.com/interview.mp3 — I think it's in English but you can auto-detect the language.","exampleUseCases":[{"title":"Podcast episode transcription","prompt":"Transcribe this podcast episode for me so I can turn it into a blog post — the audio is at https://feeds.example.com/episode42.mp3 and it's in English."},{"title":"Multilingual meeting notes","prompt":"I have a recorded team meeting in Spanish at https://storage.example.com/meeting-2024-06.wav — can you transcribe it and give me the timestamped segments so I know who said what and when?"},{"title":"Voice memo to text","prompt":"Here's a base64-encoded voice memo I recorded on my phone — please convert it to text so I can copy it into my notes app."}],"resultDescription":"Returns a JSON object with the full transcribed text, the Whisper model used, total audio duration in seconds, the detected or specified language code, and an array of timed segments each containing start time, end time, and the spoken text in that segment.","failureModes":["Audio URL is inaccessible or returns a non-200 response — transcription fails","Unsupported audio format provided — error or empty result","Base64 audio is malformed or too large — request rejected","Language code is invalid — may fall back to auto-detect or error","Very long audio files may time out on the Cloudflare Workers runtime","Payment not included or insufficient USDC — 402 Payment Required response"],"whenToPreferThis":"Choose this endpoint when you need a pay-per-call, keyless speech-to-text transcription with no signup overhead, especially when paying via USDC on Base via x402. It returns rich segment-level timestamps alongside full transcripts, making it ideal for captioning or meeting notes. Prefer it over managed STT services when you want crypto-native micropayments and no API key management.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-02T15:49:29.664Z","isFirstParty":false,"canonicalSlug":"sitecheck-api-speech-to-text-transcription-add41a34"}