AI infrastructure & developer tools
LangVoice.pro — text-to-speech API for AI agents
A developer TTS platform with natural voices, multi-language speech and first-class SDKs for LangChain, CrewAI, AutoGen and OpenAI agents.
The problem
Teams building voice-enabled agents needed human-like speech through a simple API — not a patchwork of vendors, missing SDKs and weak agent-framework support.
The solution
NexusNao built LangVoice as a production TTS product: REST API plus official Python and JavaScript/TypeScript SDKs, 28+ natural voices across 9 languages, multi-voice dialogue synthesis, and ready-made tools for LangChain, CrewAI, AutoGen and OpenAI so agents can speak without custom glue code.
The process
Defined the developer surface: API keys, voice/language catalogue and async-friendly clients
Shipped Python and Node SDKs with typed interfaces and agent-tool helpers
Added multi-voice synthesis for dialogue-style audio in a single request
Published docs, packaging (PyPI / npm) and a self-serve product site at langvoice.pro
Results
- Live platform at langvoice.pro with 28+ voices and 9-language coverage
- Official SDKs on GitHub with integrations for major AI agent frameworks
- Multi-voice synthesis and agent tools (TTS, voice list, language list) for production voice agents
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