{"uid":"cap_FLUo1AdXhmataOr4pVHWs","slug":"withzero-audio-transcription-via-gpt-4o-zeroclick-df233551","name":"WithZero Audio Transcription via GPT-4o (ZeroClick)","description":"Transcribe spoken audio to text with OpenAI's GPT-4o Transcribe.","url":"https://agents.withzero.xyz/api/v1/audio/transcripts/gpt-4o-transcribe?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","example":{"audio":"UklGRiYAAABXQVZFZm10IBAAAAABAAEAQB8AAIA+AAACABAAZGF0YQIAAAAAAA==","format":"wav"},"required":["audio","format"],"properties":{"audio":{"type":"string","maxLength":20971524,"minLength":1,"description":"Base64-encoded audio to transcribe (decoded size up to 15 MB)."},"format":{"enum":["wav","mp3"],"type":"string","description":"Container format of the audio."}},"additionalProperties":false},"responseSchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["text","seconds","model","price_usdc"],"properties":{"text":{"type":"string","description":"The transcript of the audio."},"model":{"type":"string","description":"The model that produced the transcript."},"seconds":{"type":"number","description":"Detected duration of the input audio in seconds."},"price_usdc":{"type":"string","description":"The amount charged for this request, in USDC."}},"additionalProperties":false},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.3","displayCostAsset":"USDC","priceDynamic":true,"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":{"amountUsd":"0.30","asset":"USDC"},"pricing":{"kind":"session","summary":"$0.3/call","primary":{"kind":"session","protocol":"mpp","network":"tempo","amountUsd":"0.3","per":"call","confidence":"exact","depositUsd":"0.30"},"accepted":[{"kind":"session","protocol":"mpp","network":"tempo","amountUsd":"0.3","per":"call","confidence":"exact","depositUsd":"0.30"},{"kind":"dynamic","protocol":"x402","network":"base","amountUsd":"0.3","per":"call","confidence":"exact"},{"kind":"dynamic","protocol":"mpp","network":"tempo","amountUsd":null,"per":"call","confidence":"unknown"}]},"paymentMethods":[{"uid":"pm__Vx0TpJrosFWCMF5gGNSk","protocol":"mpp","methodType":"crypto","chain":"tempo","mode":"session","costAmount":"0.3","costPer":"request","priority":0,"asset":"0x20C000000000000000000000b9537d11c60E8b50","unit":"request","depositMicros":300000,"planRef":null},{"uid":"pm_VHhqIEPTGy5sPLLp7AMaE","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.3","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null},{"uid":"pm_yBLsMcqzFTWjgGg8D9c1Q","protocol":"mpp","methodType":"crypto","chain":"tempo","mode":"charge","costAmount":"unknown","costPer":"request","priority":0,"asset":null,"unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Transcribes base64-encoded audio (WAV or MP3, up to 15 MB) to text using OpenAI's GPT-4o transcription model, billed per call via ZeroClick's x402 payment layer.","exampleAgentPrompt":"Can you transcribe this MP3 audio clip for me? I'll give you the base64-encoded audio data — it's a short voice memo I recorded earlier and I need the text of what was said.","exampleUseCases":[{"title":"Voice memo to text conversion","prompt":"I have a base64-encoded WAV file of a voice memo I recorded this morning — can you transcribe it and give me the full text of what I said?"},{"title":"Meeting recording transcript","prompt":"Here's a base64-encoded MP3 of a short meeting recording — please transcribe everything that was spoken so I can review it as text."},{"title":"Podcast clip transcription","prompt":"I've got a base64-encoded MP3 clip from a podcast episode — can you run it through GPT-4o and get me an accurate transcript of what's being said?"}],"resultDescription":"A text transcript of the spoken content in the submitted audio. The response contains the transcribed text produced by GPT-4o from the decoded audio data.","failureModes":["Audio exceeds 15 MB decoded size — request rejected","Unsupported format provided (not wav or mp3) — validation error","Invalid or malformed base64 string — decoding failure","Audio quality too poor for accurate transcription — degraded or incomplete output","Insufficient USDC balance or payment failure via x402 — payment error preventing execution"],"whenToPreferThis":"Choose this endpoint when you need GPT-4o-quality speech-to-text transcription without managing your own OpenAI API key or billing, and when you are operating in an agent context that supports x402 autonomous micropayments. Especially suitable for agents needing pay-per-use transcription of WAV or MP3 audio up to 15 MB with no vendor account setup.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":3,"lastUsedAt":"2026-09-03T14:17:02.974Z","lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-28T19:21:15.917Z","isFirstParty":true,"canonicalSlug":"withzero-audio-transcription-via-gpt-4o-zeroclick-df233551"}