Text-to-speech API for AI agents. Convert text to natural speech audio in 20+ languages via Google TTS engine. Returns base64-encoded MP3 ready for playback. Tools: media_text_to_speech. Use this for voice notifications, accessibility features, audio content generation, or building voice interfaces. Returns: {audio (base64 MP3), language, duration}. No API key required — x402 micropayment $0.005/call on Base L2.
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