{"uid":"cap_vtixc5uOyvkRezia5p87k","slug":"baalstt-speech-to-text-api-3f28154d","name":"BaalSTT Speech-to-Text API","description":"BaalSTT — Speech-to-Text API (Deepgram nova-2 / whisper-large-v3). Audio in -> text out. AI agents pay per call via x402/USDC (gasless, no KYC); 3 free transcriptions / 24 h / IP without payment.","url":"https://baalstt.tailb3821a.ts.net/transcribe?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","required":["url"],"properties":{"url":{"type":"string","description":"Public http(s) URL of the audio to transcribe"},"model":{"enum":["nova-2","whisper-large-v3","whisper-large-v3-turbo"],"type":"string"}}},"responseSchema":{"type":"object","properties":{"text":{"type":"string","description":"Transcribed text"},"model":{"type":"string"},"duration_s":{"type":["number","null"],"description":"Audio duration in seconds"}}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.05","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"registry","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"down","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.05/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.05","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.05","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_aq99LmAUnUnHEGvRARoO-","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.05","costPer":"request","priority":0,"asset":"0x833589fcd6edb6e08f4c7c32d4f71b54bda02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Transcribes audio from a public URL into text using Deepgram nova-2 or Whisper large-v3 models, with pay-per-call USDC pricing via x402.","exampleAgentPrompt":"Can you transcribe the audio file at https://example.com/interview.mp3 using the whisper-large-v3 model and give me the full text?","exampleUseCases":[{"title":"Podcast episode transcription","prompt":"I have a podcast episode hosted at https://mypodcast.com/ep42.mp3 — can you transcribe the whole thing using nova-2 and give me the full text so I can post it as show notes?"},{"title":"Meeting recording to minutes","prompt":"Please convert this meeting recording at https://storage.mycompany.com/meetings/standup-2024-06-10.wav to text using whisper-large-v3 so I can turn it into meeting minutes."},{"title":"Voicemail to text","prompt":"I've got a voicemail saved at https://voicemails.example.com/vm-003.ogg — can you transcribe it with nova-2 so I can read what was said?"}],"resultDescription":"Returns a JSON object containing the full transcribed text string, the model name used for transcription, and the duration of the audio in seconds (may be null for some models).","failureModes":["Audio URL is not publicly accessible or returns a non-200 status — transcription will fail","Unsupported audio format at the provided URL","Free tier (3 calls per 24h per IP) exhausted without payment — returns 402 Payment Required","Network timeout if audio file is very large or slow to download","Invalid model enum value provided — request rejected","USDC payment failure or insufficient balance when free tier is exceeded"],"whenToPreferThis":"Choose BaalSTT when you need quick, low-cost audio-to-text transcription from a public URL without account setup or KYC — especially in agent workflows where per-call micropayments via x402/USDC are preferred over monthly subscriptions. It offers a choice between Deepgram nova-2 (fast, accurate) and Whisper large-v3 (high accuracy, multilingual), making it flexible for both real-time and batch-style use cases.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-12T04:25:27.171Z","isFirstParty":false,"canonicalSlug":"baalstt-speech-to-text-api-3f28154d"}