Unisound

aid: unisound
accessModel:
  pricing: unknown
  onboarding: self-serve
  trial: false
  try_now: false
  public: false
  label: Self-serve signup
  confidence: high
  source:
  - plans
  - authentication
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/unisound.png
name: Unisound
description: Unisound (云知声) is a Chinese AGI technology company delivering conversational AI across smart living and smart
  healthcare. Its Token Hub MaaS platform exposes OpenAI- and Anthropic-compatible APIs for the Unisound U2 agent-native large
  language model and U2-Med medical model, plus U2-ASR speech transcription, U2-TTS synthesis and voice cloning, voiceprint,
  and U1-OCR document parsing services, alongside the legacy AI Open Platform WebSocket speech APIs and the Shanhai (UniGPT)
  LLM WebAPI.
url: https://raw.githubusercontent.com/api-evangelist/unisound/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- qiming
x-tier: enriched
x-tier-reason: real-api-surface
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-21'
tags:
- Company
- Artificial Intelligence
- Speech Recognition
- Text-to-Speech
- Voice Cloning
- Large Language Models
- OCR
- Healthcare
- Machine-Learning
- Voice
tags_raw:
- Company
- Artificial Intelligence
- Speech Recognition
- Text-to-Speech
- Voice Cloning
- Large Language Models
- OCR
- Healthcare
- Machine Learning
- Voice
apis:
- name: Unisound Token Hub API
  description: 'Multi-modal MaaS API for Unisound U2 models: OpenAI-compatible chat completions and Anthropic-compatible messages
    for the U2 and U2-Med LLMs (streaming, function calling, structured output, context caching, prefix continuation), WebSocket
    one-shot and real-time speech recognition, asynchronous long-audio transcription and long-text speech synthesis via task
    polling, voiceprint registration and lookup, voice cloning and timbre management, asynchronous document parsing and information
    extraction (U1-OCR), and file management. Authenticated with Bearer API keys.'
  humanURL: https://maas.unisound.com/docs/api/overview
  baseURL: https://maas-api.unisound.com/v1
  tags:
  - LLM
  - Speech Recognition
  - Text-to-Speech
  - Voice Cloning
  - OCR
  properties:
  - type: Documentation
    url: https://maas.unisound.com/docs
  - type: APIReference
    url: https://maas.unisound.com/docs/api/overview
- name: Unisound Shanhai (UniGPT) LLM WebAPI
  description: REST chat-completions WebAPI for the Shanhai (山海 / UniGPT) large language model on the Unisound AI Open Platform.
    POST rest/v1.1/chat/completions with signature-based authentication (SHA-256 over appkey + udid + timestamp + secret),
    supporting streaming and non-streaming responses.
  humanURL: https://ai.unisound.com/doc/unigpt/WebAPI.html
  baseURL: https://unigpt-api.hivoice.cn
  tags:
  - LLM
  - Chat
- name: Unisound AI Open Platform Speech WebAPI
  description: '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.'
  humanURL: https://ai.unisound.com/doc/asronesentence/WebAPI.html
  baseURL: wss://ws-osasr.hivoice.cn/v1/asr
  tags:
  - Speech Recognition
  - Text-to-Speech
  - Voice
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: DomainSecurity
  url: security/unisound-domain-security.yml
- type: Website
  url: https://www.unisound.com
- type: DeveloperPortal
  url: https://ai.unisound.com
- type: Documentation
  url: https://maas.unisound.com/docs
- type: APIReference
  url: https://maas.unisound.com/docs/api/overview
- type: GettingStarted
  url: https://maas.unisound.com/docs/guide/quickstart
- type: Pricing
  url: https://maas.unisound.com/docs/price/overview
- type: TermsOfService
  url: https://maas.unisound.com/docs/protocol/user-agreement
- type: PrivacyPolicy
  url: https://maas.unisound.com/docs/protocol/privacy-policy
- type: Support
  url: https://maas.unisound.com/docs/guide/contact
- type: GitHubOrganization
  url: https://github.com/Unisound
- type: SignUp
  url: https://maas.unisound.com/
- type: RateLimits
  url: rate-limits/unisound-rate-limits.yml
- type: RateLimits
  url: https://maas.unisound.com/docs/api/rate-limits
- type: ChangeLog
  url: https://maas.unisound.com/docs/release/notes
- type: ChangeLog
  url: changelog/unisound-changelog.yml
- type: Packages
  url: packages/unisound-packages.yml
- type: SDKs
  url: packages/unisound-packages.yml
- type: LLMsTxt
  url: llms/unisound-llms.txt
- type: Conformance
  url: conformance/unisound-conformance.yml
- type: ErrorCatalog
  url: errors/unisound-problem-types.yml
- type: Lifecycle
  url: lifecycle/unisound-lifecycle.yml
- type: Authentication
  url: authentication/unisound-authentication.yml
- type: Sandbox
  url: sandbox/unisound-sandbox.yml
- type: Conventions
  url: conventions/unisound-conventions.yml
- type: Plans
  url: plans/unisound-plans.yml
x-enrichment:
  date: '2026-07-21'
  status: enriched
  artifacts_added: 13
  pass: local-v1