{
  "format": "delx/intent-card/v1",
  "id": "audio-transcription-api",
  "intent": "transcribe a short WAV recording to text",
  "title": "Audio transcription API for agents",
  "description": "Transcribe one bounded WAV clip of up to 60 seconds for $0.02 with text and a SHA-256 delivery receipt.",
  "keywords": [
    "audio transcription API",
    "WAV to text",
    "voice note transcript",
    "x402 transcription"
  ],
  "updated_at": "2026-08-23",
  "canonical_url": "https://commerce.delx.ai/intents/audio-transcription-api",
  "machine_url": "https://commerce.delx.ai/intents/audio-transcription-api.json",
  "recommendation": {
    "tool_name": "transcribe_audio",
    "service_name": "Audio Transcription for Agents",
    "method": "POST",
    "resource": "https://api.delx.ai/api/v1/x402/transcribe-audio",
    "price_usdc": "0.02",
    "payment_protocols": [
      "x402",
      "mpp"
    ],
    "input_schema": {
      "type": "object",
      "properties": {
        "audio_base64": {
          "type": "string",
          "minLength": 1,
          "maxLength": 2800000,
          "description": "One base64-encoded WAV up to 2 MiB decoded and 60 seconds. audio/wav data-URI prefixes are accepted. URLs, file paths, and model/version fields are rejected."
        }
      },
      "required": [
        "audio_base64"
      ],
      "additionalProperties": false
    },
    "example_input": {
      "audio_base64": "\u003cbase64 WAV up to 2 MiB decoded and 60 seconds>"
    },
    "example_output": {
      "generation_id": "9c2e1b84f0a14d2e9c8b7a6543210fed",
      "text": "hello agents",
      "text_url": "https://api.delx.ai/api/v1/generated-transcripts/9c2e1b84f0a14d2e9c8b7a6543210fed.txt",
      "provider": "replicate",
      "model": "vaibhavs10/incredibly-fast-whisper",
      "provider_prediction_id": "tr-example-prediction",
      "media_type": "text/plain",
      "bytes": 12,
      "sha256": "2d6c7c2b3f3c8e1e7b0d3a5b6e7f8a9b1234567890abcdef1234567890abcdef",
      "input_sha256": "34a8815e9c57e321194d50f2ea8b64394019fb8038c9aefd7a9a306a5030fc31",
      "upstream_cost_usd": 0.0036,
      "sale_price_usdc": 0.02,
      "gross_margin_usd": 0.0164
    },
    "agentcash": {
      "buy": "npx agentcash@latest fetch https://api.delx.ai/api/v1/x402/transcribe-audio -m POST -H 'x-delx-source: intent-card-audio-transcription-api' --max-amount 0.02 -b '{\"audio_base64\":\"\u003cbase64 WAV up to 2 MiB decoded and 60 seconds>\"}'",
      "max_amount_usdc": "0.02"
    }
  },
  "attribution": {
    "header": "x-delx-source",
    "value": "intent-card-audio-transcription-api"
  },
  "evidence": {
    "paid_openapi": "https://api.delx.ai/openapi.x402.json",
    "governed_portfolio": "https://api.delx.ai/x402-portfolio.json",
    "live_contract": "https://api.delx.ai/api/v1/x402/transcribe-audio"
  }
}