aid: toneperfect
name: TonePerfect (Pronunciation Assessment API)
image: https://api.toneperfect.app/static/og-image.png
description: TonePerfect offers an AI‑powered pronunciation assessment API for language learning applications. It supports ten languages and provides
  a single endpoint that returns a detailed score (0‑100) for the whole sentence, each word, and individual sounds, including tone information
  for Mandarin. The service includes free tier credits, transparent pricing, and robust error handling, making it suitable for developers integrating
  speech evaluation into apps.
url: https://raw.githubusercontent.com/api-evangelist/toneperfect/refs/heads/main/apis.yml
x-type: company
x-source: harvest:new-submission
x-tier: profiled
x-tier-reason: enrichment pass 2026-10-08 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-10-08'
modified: '2026-10-08'
tags:
- Company
- AI
- Speech
- Language-Learning
- Pronunciation
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: AgenticAccess
  url: agentic-access/toneperfect-agentic-access.yml
- type: Plans
  url: plans/toneperfect-plans-pricing.yml
- type: Spectral
  url: rules/toneperfect-rules.yml
- type: JSONLD
  url: json-ld/toneperfect-context.jsonld
- type: Vocabulary
  url: vocabulary/toneperfect-vocabulary.yml
- type: DataModel
  url: data-model/toneperfect-data-model.yml
- type: Idempotency
  url: conventions/toneperfect-conventions.yml
- type: Conventions
  url: conventions/toneperfect-conventions.yml
- type: Authentication
  url: authentication/toneperfect-authentication.yml
- type: ErrorCatalog
  url: errors/toneperfect-problem-types.yml
- type: Conformance
  url: conformance/toneperfect-conformance.yml
- type: LLMsTxt
  url: llms/toneperfect-llms.txt
- type: Hosts
  url: hosts/toneperfect-hosts.yml
- type: Vendors
  url: vendors/toneperfect-vendors.yml
- type: Packages
  url: packages/toneperfect-packages.yml
- type: TermsOfService
  url: https://api.toneperfect.app/terms/
- type: StatusPage
  url: https://api.toneperfect.app/status/
- type: Security
  url: https://api.toneperfect.app/security/
- type: SDKs
  url: https://api.toneperfect.app/sdk/
- type: PrivacyPolicy
  url: https://api.toneperfect.app/privacy/
- type: Pricing
  url: https://api.toneperfect.app/pricing/
- type: Login
  url: https://api.toneperfect.app/login
- type: ChangeLog
  url: https://api.toneperfect.app/changelog/
- type: Blog
  url: https://api.toneperfect.app/blog/
- type: GettingStarted
  url: https://api.toneperfect.app/quickstart/
- type: DomainSecurity
  url: security/toneperfect-domain-security.yml
- type: Website
  url: https://api.toneperfect.app
- type: Documentation
  url: https://api.toneperfect.app/docs
apis:
- aid: toneperfect:toneperfect-assessment-api
  name: TonePerfect (Pronunciation Assessment API) Assessment API
  description: >-
    The Assessment API from TonePerfect (Pronunciation Assessment API) — 1 operation(s) for assessment.
  humanURL: https://api.toneperfect.app/docs
  tags:
  - Assessment
  properties:
  - type: OpenAPI
    url: openapi/toneperfect-assessment-api-openapi.yml
  - type: JSONSchema
    url: json-schema/toneperfect-assessment-schema.json
  - type: JSONSchema
    url: json-schema/toneperfect-capabilities-schema.json
  - type: JSONSchema
    url: json-schema/toneperfect-compact-assessment-schema.json
  - type: JSONSchema
    url: json-schema/toneperfect-status-window-schema.json
- aid: toneperfect:toneperfect-capabilities-api
  name: TonePerfect (Pronunciation Assessment API) Capabilities API
  description: >-
    The Capabilities API from TonePerfect (Pronunciation Assessment API) — 1 operation(s) for capabilities.
  humanURL: https://api.toneperfect.app/docs
  tags:
  - Capabilities
  properties:
  - type: OpenAPI
    url: openapi/toneperfect-capabilities-api-openapi.yml
  - type: JSONSchema
    url: json-schema/toneperfect-assessment-schema.json
  - type: JSONSchema
    url: json-schema/toneperfect-capabilities-schema.json
  - type: JSONSchema
    url: json-schema/toneperfect-compact-assessment-schema.json
  - type: JSONSchema
    url: json-schema/toneperfect-status-window-schema.json
- aid: toneperfect:toneperfect-utilities-api
  name: TonePerfect (Pronunciation Assessment API) Utilities API
  description: >-
    The Utilities API from TonePerfect (Pronunciation Assessment API) — 3 operation(s) for utilities.
  humanURL: https://api.toneperfect.app/docs
  tags:
  - Utilities
  properties:
  - type: OpenAPI
    url: openapi/toneperfect-utilities-api-openapi.yml
  - type: JSONSchema
    url: json-schema/toneperfect-assessment-schema.json
  - type: JSONSchema
    url: json-schema/toneperfect-capabilities-schema.json
  - type: JSONSchema
    url: json-schema/toneperfect-compact-assessment-schema.json
  - type: JSONSchema
    url: json-schema/toneperfect-status-window-schema.json
x-submission-notes: Solo founder, gmail contact. Domain toneperfect.app; submitter asks for one API only.
x-submission-probe: root/docs 200; openapi.json 200 (OpenAPI 3.1); llms.txt 200; soft-404 clean (404)
x-submitted-by: nicolas.maissouradze@gmail.com (apis.io/add, 2026-10-07T07:41:08.244Z)
x-enrichment:
  date: '2026-10-08'
  status: enriched
  artifacts_added: 19
  pass: modular-v1
  engine: identity=local,contract=local,surfaces=local,docs=local,regulatory=local