# TonePerfect (Pronunciation Assessment API)

**Canonical:** https://apis.io/providers/toneperfect/  
**Website:** https://api.toneperfect.app  
**APIs profiled:** 1

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.

## Kin Score — 60.1 / 100 (strong)

Scored 2026-10-09 under rubric 0.23.0.

| Facet | Score |
|---|---|
| Discoverability | 57.1 |
| Contract Quality | 60.5 |
| Contract Governance | 79.1 |
| Operational Transparency | 42.1 |
| Developer Ergonomics | 42.9 |
| Access Clarity | 73.2 |

Regulatory layer — **Horizontal (data, software, accessibility, platform)**: 22.7 (matched via fallback).

## Agent readiness — 44.8 (agent-native)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | unknown |
| Reversibility Documented | no |
| MCP Server | documented |
| Auth Clarity | bearer |
| Idempotency | verified |
| Error Semantics | verified |
| OpenAPI Examples | partial |
| Rate Limit Signal | verified |
| Event Surface Described | no |
| Agent Skills | no |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |
| Delegated Identity | no |
| Protected Resource Metadata | no |
| Dynamic Client Registration | no |
| Agentic Commerce | no |

## APIs (3)

- **TonePerfect (Pronunciation Assessment API) Assessment API** — The Assessment API from TonePerfect (Pronunciation Assessment API) — 1 operation(s) for assessment.
- **TonePerfect (Pronunciation Assessment API) Capabilities API** — The Capabilities API from TonePerfect (Pronunciation Assessment API) — 1 operation(s) for capabilities.
- **TonePerfect (Pronunciation Assessment API) Utilities API** — The Utilities API from TonePerfect (Pronunciation Assessment API) — 3 operation(s) for utilities.

## Agentic access (1)

- **Toneperfect Agentic Access** — 5 operations · 2 acting

## Security (2)

- **Toneperfect Authentication** — 1 scheme
- **Toneperfect Domain Security** — TLSv1.3 · HSTS · DMARC

## Plans (1)

- **Toneperfect Plans Pricing**

## Tags

Company, AI, Speech, Language-Learning, Pronunciation

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/toneperfect/). Scores are computed from the provider's own public artifacts under a published rubric.