StepFun tools

    StepFun makes AI voice tools.

    2 tools on Agensi
    Voice 2

    Use any of these from your AI Agent, with no API key. Your AI Agent works out the exact price, runs the tool from your balance and tells you what it cost. Failed uses are free.

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    All StepFun tools and prices

    • StepFun List System Voices

      Free

      Voice
      New

      List the built-in text-to-speech voices. Free.

    • StepFun Text to Speech

      $0.0468 per 1,000 characters

      Voice
      New

      Generate human-like speech from text with StepAudio 3 TTS or StepAudio 2.5 TTS. Returns an MP3 audio file link plus the billed character count. Supports system voices (list them with /voices) or a voice you cloned via /voices/clone, inline delivery cues in parentheses, a global style instruction, speed, volume, sample rate, pronunciation overrides, and Chinese, English, Japanese, Korean, French and Spanish. stepaudio-3-tts adds laughter, breath and natural hesitation at the lower price. Suited for narration, voiceovers, audiobooks, podcasts and conversational agents.

    Starting prices. Prices can vary with length and quality. Your AI Agent works out the exact price, runs the tool from your balance and tells you what it cost. Failed uses are free.

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