# Unisound AI Open Platform Speech WebAPI

**Canonical:** https://apis.io/apis/unisound/unisound-ai-open-platform-speech-webapi/  
**Provider:** Unisound — https://apis.io/providers/unisound/  
**Base URL:** wss://ws-osasr.hivoice.cn/v1/asr  
**Documentation:** https://ai.unisound.com/doc/asronesentence/WebAPI.html

Unisound AI Open Platform Speech WebAPI is one of 3 APIs that [Unisound](https://apis.io/providers/unisound/) publishes on the [APIs.io](https://apis.io/) network. Tagged areas include Speech Recognition, Text-to-Speech, and Voice.

WebSocket speech APIs on the Unisound AI Open Platform: one-sentence speech recognition (Mandarin, Cantonese, Sichuanese, English; domain models for medical, finance, law, and more), real-time transcription, audio file transcription, oral evaluation, voiceprint, and speech synthesis. Signature-based authentication (SHA-256 over appkey + timestamp + secret); iOS, Android, and HarmonyOS SDKs.

## Machine-readable artifacts (1)

- **OpenAPI** — https://raw.githubusercontent.com/api-evangelist/unisound/refs/heads/main/apis.yml

## Other Unisound APIs (2)

- [Unisound Token Hub API](https://apis.io/apis/unisound/unisound-token-hub-api/)
- [Unisound Shanhai (UniGPT) LLM WebAPI](https://apis.io/apis/unisound/unisound-shanhai-unigpt-llm-webapi/)

## Tags

Speech Recognition, Text-to-Speech, Voice

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/unisound/unisound-ai-open-platform-speech-webapi/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/unisound/.