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by io.github.hmoses
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Transcribe audio

transcribe_audio

Convert audio to transcript text for Poly-Glot workflows. Use for supplied speech recordings, not for translating text. Provide exactly one source: a publicly reachable HTTPS audioUrl or base64-encoded audioBase64 (without a data-URL prefix). For base64 audio, supply mimeType and filename when known; languageHint can improve recognition. Set detectLanguage=true to identify the resulting text's language. Requires an active trial or Pro. Returns JSON containing transcript text, optional detectedLanguage, provider, and model. Audio is submitted to a transcription provider; do not send material without permission.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
promptNoOptional recognition context, such as expected names or specialist vocabulary; not the text to transcribe.
audioUrlNoPublic HTTPS URL of an audio recording to transcribe. Use this OR audioBase64, never both; private or local URLs are not supported.
filenameNoOriginal audio filename with extension, such as meeting.m4a, to help determine the format.
mimeTypeNoAudio MIME type, such as audio/mpeg, audio/mp4, or audio/wav. Recommended for base64 input.
audioBase64NoBase64-encoded audio bytes, without a data: prefix. Alternative to audioUrl; provide exactly one audio source.
languageHintNoOptional language hint for speech recognition, such as en, es, or fr. Leave blank if unknown.
detectLanguageNoWhen true, also infer a supported Poly-Glot language from the resulting transcript; defaults to false.

Schema Changelog

Changes observed during successful MCP inspections.

  1. Changed7 schema fields changed
    • addedInput schema / properties / audioBase64 / description
      Added value: +"Base64-encoded audio bytes, without a data: prefix. Alternative to audioUrl; provide exactly one audio source."
    • addedInput schema / properties / audioUrl / description
      Added value: +"Public HTTPS URL of an audio recording to transcribe. Use this OR audioBase64, never both; private or local URLs are not supported."
    • addedInput schema / properties / detectLanguage / description
      Added value: +"When true, also infer a supported Poly-Glot language from the resulting transcript; defaults to false."
    • addedInput schema / properties / filename / description
      Added value: +"Original audio filename with extension, such as meeting.m4a, to help determine the format."
    • addedInput schema / properties / languageHint / description
      Added value: +"Optional language hint for speech recognition, such as en, es, or fr. Leave blank if unknown."
    • addedInput schema / properties / mimeType / description
      Added value: +"Audio MIME type, such as audio/mpeg, audio/mp4, or audio/wav. Recommended for base64 input."
    • addedInput schema / properties / prompt / description
      Added value: +"Optional recognition context, such as expected names or specialist vocabulary; not the text to transcribe."
  2. First observed

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