High-Performance AI Voice & Audio API for Developers
Integrate ultra-natural Text-to-Speech (TTS), Instant Voice Cloning, Speech-to-Text (STT), Subtitle SRT sync, and AI Dubbing into your applications with just a few lines of code.
Select a capability and language to view production-ready request and response payloads.
Synthesize speech from text using 3,000+ studio-grade 48kHz voices with Natural, Narration, or Dramatic style presets.
curl -X POST "https://api.yupvox.com/v1/tts" \
-H "Authorization: Bearer sk-yupvox-YOUR_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"voiceId": "DFE237",
"text": "Hello, this is a high-quality AI voice generated by the YupVox API.",
"speed": 1.0,
"pitch": 0
}'{
"success": true,
"data": {
"jobId": "tts_82910_1725184900000",
"historyId": 82910,
"status": "processing",
"voiceId": "DFE237",
"charCount": 62,
"estimatedTimeSec": 1.2
}
}6 Core Capabilities of YupVox API
All cutting-edge voice and audio AI algorithms unified under a single, robust REST API.
Ultra-Natural 48kHz TTS
3,000+ studio voices with natural pacing, audiobooks narration, and emotional drama styles.
Instant Voice Cloning API
Instant zero-shot voice cloning. Dual-engine architecture with Omega (multilingual) & Alpha (ultra-fast VN).
Precision Speech to Text
High-accuracy automatic speech recognition with timestamps, punctuation, and multi-speaker support.
Subtitle-to-Audio (SRT)
Convert SRT subtitle text into perfectly timed audio segments aligned with original video frames.
AI Voice Changer
Transform speaker timbre and tone into target AI voices while retaining nuance and cadence.
Video & Audio Dubbing
End-to-end automated pipeline: Transcribe → Translate → Synthesize localized voice audio.
Seamless Integration in 3 Steps
Start generating high-quality speech in under 3 minutes.
Generate Your API Key
Sign up for free and get your secret API key (`sk-yupvox-...`) with 50,000 complimentary credits.
Send REST HTTP Request
Call standard REST endpoints using any language (cURL, Python, Node.js, Go) with Bearer token authentication.
Receive Studio-Quality Audio
Instantly download high-bitrate MP3/WAV audio via high-speed CDN ready for streaming or download.
Empowering Real-World Applications
Trusted by creators, SaaS platforms, media publishers, and conversational AI developers.
Short Video Automation (TikTok / Shorts)
Generate thousands of daily automated videos with captivating, viral-ready AI voiceovers.
AI Voice Bots & Conversational IVR
Sub-second latency enabling natural conversational AI agents, smart IVR, and customer support bots.
Audiobooks & Automated News Reader
Convert entire article repositories and e-books into studio-grade audiobooks with narrative pacing.
EdTech & Course Localization
Automatically dub educational courses into dozens of global languages for international students.
1 Credit = 1 Character • Shared Across All Tools
Your credit balance is shared seamlessly between the web studio and API calls. No setup fees, no per-request surcharge.
Developer FAQs
How is YupVox API billed?
Simple 1:1 transparent ratio: 1 Credit = 1 Character generated (TTS) or transcribed (STT). API requests draw from your account credit balance with no hidden API fees.
Is there a concurrency limit on API requests?
YupVox GPU cloud infrastructure uses distributed worker queues, allowing high concurrent requests without artificial bottlenecks.
What is the typical response latency for TTS?
Demo preview mode responds in 0.5s - 1.5s. Full production conversions process via asynchronous background queues within a few seconds depending on text length.
Can I test the API before purchasing a paid plan?
Yes! Upon creating an account, you receive 50,000 free trial credits to test all voice models and studio tools.
Is my text and audio data secure?
100% data security. Cloned voice models are strictly encrypted and tied to your account ID. You can also permanently delete history records and files via API.
Ready to Supercharge Your App with Voice AI?
Create your account today to receive 50,000 free credits and integrate studio-grade AI voices into your pipeline.