# Unisound

> Unisound (云知声) is a Chinese AGI technology company delivering conversational AI for smart living and smart healthcare. Its Token Hub MaaS platform exposes OpenAI- and Anthropic-compatible APIs for the U2 agent-native LLM family, plus speech recognition, speech synthesis, voice cloning, voiceprint, and OCR document-parsing APIs; the legacy AI Open Platform serves WebSocket speech APIs and the Shanhai (UniGPT) LLM WebAPI.

Generated by API Evangelist from apis.yml and repo artifacts on 2026-07-21 (no provider-published llms.txt was found).

## APIs

- [Token Hub API reference](https://maas.unisound.com/docs/api/overview): Multi-modal MaaS API at https://maas-api.unisound.com/v1 — OpenAI-compatible chat completions, Anthropic-compatible messages (/anthropic/v1/messages), WSS speech recognition, async transcription/synthesis/OCR tasks, voiceprint, voice cloning, file management. Bearer API-key auth.
- [Shanhai (UniGPT) LLM WebAPI](https://ai.unisound.com/doc/unigpt/WebAPI.html): POST https://unigpt-api.hivoice.cn/rest/v1.1/chat/completions with SHA-256 signature auth.
- [AI Open Platform speech WebAPI](https://ai.unisound.com/doc/asronesentence/WebAPI.html): WebSocket one-sentence ASR at wss://ws-osasr.hivoice.cn/v1/asr (dialects host ws-osasr-dialect.hivoice.cn), real-time transcription, oral evaluation, TTS, voiceprint.

## Docs

- [Token Hub documentation](https://maas.unisound.com/docs)
- [Quickstart](https://maas.unisound.com/docs/guide/quickstart)
- [Rate limits](https://maas.unisound.com/docs/api/rate-limit)
- [Error codes](https://maas.unisound.com/docs/api/errorcode)
- [Model pricing](https://maas.unisound.com/docs/price/overview)
- [Model releases](https://maas.unisound.com/docs/release/notes)
- [Playground](https://maas.unisound.com/playground)
- [AI Open Platform docs center](https://ai.unisound.com/)
- [User agreement](https://maas.unisound.com/docs/protocol/user-agreement)
- [Privacy policy](https://maas.unisound.com/docs/protocol/privacy-policy)

## Repo artifacts

- [apis.yml](https://raw.githubusercontent.com/api-evangelist/unisound/refs/heads/main/apis.yml): APIs.json profile of Unisound
- authentication/unisound-authentication.yml: Bearer API key + signature auth profile
- conventions/unisound-conventions.yml: OpenAI/Anthropic compatibility, task-polling async pattern, streaming, model capabilities
- errors/unisound-problem-types.yml: Token Hub business error-code registry + Open Platform error codes
- sandbox/unisound-sandbox.yml: playground and free-trial resource packs
- changelog/unisound-changelog.yml: model release feed
- conformance/unisound-conformance.yml: standards conformance + Chinese regulatory filings