{"id":"e1b6aace-ea65-4751-afaf-f954de241798","shortId":"VHCccN","kind":"x402","title":"Audio-to-text transcription via x402 micropayment at $0.003 per request.","tagline":"Audio-to-text transcription via x402 micropayment at $0.003 per request.","description":"This x402-enabled endpoint at convert.kasandell.workers.dev/convert/audio provides audio-to-text transcription. You POST an audio file and receive a JSON object containing the transcribed text. The service accepts common audio formats including MP3 (audio/mpeg), WAV, M4A, OGG, FLAC, and WebM.\n\nPricing is $0.003 per request, settled via the x402 protocol. The endpoint returned a 402 Payment Required challenge on probe, confirming it is live and operational. The service is hosted on Cloudflare Workers.\n\nDocumentation is minimal — the only available information comes from the root JSON descriptor served at the origin. There is no OpenAPI spec, no dedicated docs page, and no additional endpoints beyond the single audio conversion route. The response schema is simple: a JSON object with a single `text` string field containing the transcription result.","tags":[],"capabilities":["audio-transcription","speech-to-text","x402-payment","cloudflare-workers","multi-format-audio"],"categories":["audio"],"synonyms":["speech to text","audio transcription","voice to text","STT","transcribe audio","audio convert","whisper alternative"],"warnings":["No OpenAPI or formal API documentation available","The x402 challenge object was empty — payment parameters (network, token, amount in base units) could not be verified from the probe","Price of $0.003 is taken from the provider's self-reported root descriptor and not independently confirmed via challenge fields","No information on file size limits, supported languages, or transcription model used"],"endpointUrl":"https://convert.kasandell.workers.dev/convert/audio","protocol":"x402","transport":"http","auth":{"type":"x402","details":[{"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","extra":{"name":"USD Coin","version":"2"},"payTo":"0x043b8aa7e75068F92696c8831801587Fc105A8d8","amount":"3000","scheme":"exact","network":"eip155:8453","maxTimeoutSeconds":300}]},"qualityScore":"0.400","qualityRationale":"The endpoint is confirmed live (402 challenge captured) and the root JSON descriptor provides basic info on accepted formats, pricing, and response shape. However, there is no OpenAPI spec, no documentation pages, no x402 challenge details (the challenge object was empty), and no usage examples. Most fields are inferred from the sparse root 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'singl':134,148 'spec':123 'speech to text' 'speech-to-text' 'string':150 'text':4,16,38,53,149 'transcrib':52 'transcribe audio' 'transcript':5,17,39,154 'via':6,18,75 'voice to text' 'wav':63 'webm':68 'whisper alternative' 'worker':101 'x402':7,19,27,77 'x402-enabled':26 'x402-payment'","prices":[{"id":"9edd4079-d398-4efa-b172-71f2cc0e8430","listingId":"e1b6aace-ea65-4751-afaf-f954de241798","amountUsd":null,"unit":"per_call","nativeCurrency":"USD COIN","nativeAmount":null,"chain":"base","payTo":"0x043b8aa7e75068F92696c8831801587Fc105A8d8","paymentMethod":"x402-usd coin","isPrimary":true,"details":{"scheme":"exact","accepts_all":[{"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","extra":{"name":"USD 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