{"uid":"cap_bsURMepz8PpRbTmWKmp8Q","slug":"onchain-router-speech-to-text-transcription-e71f3400","name":"Onchain Router Speech-to-Text Transcription","description":"Give agents provider-neutral access to text, image, and speech models with USDC payments on Base, local spending controls, ambiguity-safe recovery, and verified receipts. Stable public npm clients and MIT agent integrations are available now.","url":"https://onchainrouter.dev/v1/audio/transcriptions","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"model":{"enum":["elevenlabs/scribe-v2"],"type":"string"},"file_format":{"enum":["other"],"type":"string","default":"other"},"audio_base64":{"type":"string","format":"byte","maxLength":34952536,"minLength":4,"description":"Canonical RFC 4648 Base64 audio without a data-URL prefix or whitespace."},"response_format":{"enum":["json","verbose_json"],"type":"string"}}},"responseSchema":{"type":"json","example":{"id":"trns_example","text":"Transcribed speech.","model":"elevenlabs/scribe-v2","usage":{"input_audio_ms":3100}}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.002","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":"$0.002/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.002","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.002","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_7WZYkcwHKgxEId_dTjqa3","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.002","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Transcribes audio to text using the ElevenLabs Scribe v2 model, accepting Base64-encoded audio and returning the transcribed text with usage metadata","exampleAgentPrompt":"Please transcribe this audio recording for me — encode the file as Base64 and run it through the ElevenLabs Scribe v2 model, returning the result as verbose JSON with timestamps.","exampleUseCases":[{"title":"Voice memo to written notes","prompt":"I recorded a voice memo of my meeting notes — can you transcribe the audio into text? Here's the Base64-encoded file, use ElevenLabs Scribe v2 and give me the verbose JSON output."},{"title":"Podcast interview transcription","prompt":"I have a podcast interview I need transcribed. I'll give you the audio as a Base64 string — please transcribe it using Scribe v2 and return the full text."},{"title":"Multilingual speech transcription","prompt":"Can you transcribe this audio clip I recorded? It's already Base64-encoded. Use the ElevenLabs Scribe v2 model and return a JSON response with the transcribed text."}],"resultDescription":"Returns a JSON object containing a transcription ID, the full transcribed text string, the model used (elevenlabs/scribe-v2), and usage metadata including the duration of the input audio in milliseconds. Optionally returns verbose JSON with additional detail.","failureModes":["Audio Base64 string too short (<4 chars) or too long (>34MB encoded) returns a validation error","Invalid or unsupported audio format may result in poor or empty transcription","Malformed Base64 (with data-URL prefix or whitespace) will likely cause a decode error","Network or payment failure (x402 protocol) prevents the request from completing","Model not found or unavailable returns an error if enum value is incorrect"],"whenToPreferThis":"Choose this endpoint when you need affordable, high-quality speech-to-text transcription powered by ElevenLabs Scribe v2 and want to pay per-call via USDC on-chain with no subscription. Ideal for agents operating autonomously that need programmatic audio transcription without managing API keys for ElevenLabs directly. The 0% service fee launch promotion makes it cost-competitive for high-volume transcription workloads.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":5,"lastUsedAt":"2026-09-08T15:50:04.841Z","lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T10:49:00.238Z","isFirstParty":false}