# LanguageTool

**Canonical:** https://apis.io/providers/languagetool/  
**Website:** https://languagetool.org  
**APIs profiled:** 3

LanguageTool is an open-source proofreading and grammar checking tool that supports more than 25 languages. The HTTP API enables developers to programmatically check texts for grammar and style issues, list supported languages, and manage personal dictionaries.

## Kin Score — 33.3 / 100 (thin)

Scored 2026-08-21 under rubric 0.12.0. Trend: flat (+0.0 from 33.3).

| Facet | Score |
|---|---|
| Discoverability | 74.1 |
| Contract Quality | 55.0 |
| Governance | 9.8 |
| Contract Governance | 9.8 |
| Operational Transparency | 13.2 |
| Developer Ergonomics | 9.5 |
| Commercial Clarity | 36.8 |
| Access Clarity | 36.8 |

## Agent readiness — 23.5 (agent-aware)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | derived |
| Reversibility Documented | no |
| MCP Server | no |
| Auth Clarity | no |
| Idempotency | no |
| Error Semantics | no |
| OpenAPI Examples | partial |
| Rate Limit Signal | documented |
| Event Surface Described | no |
| Agent Skills | no |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |

## Access

Freemium — onboarding: unknown, pricing: freemium, trial: no (confidence: medium).

## APIs (3)

- **LanguageTool Check API** — The Check API from LanguageTool — 1 operation(s) for check.
- **LanguageTool Languages API** — The Languages API from LanguageTool — 1 operation(s) for languages.
- **LanguageTool Words API** — The Words API from LanguageTool — 3 operation(s) for words.

## Agentic access (1)

- **Languagetool Agentic Access** — 5 operations · 3 acting

## Security (1)

- **Languagetool Domain Security** — TLSv1.3 · DMARC

## Plans (1)

- **Languagetool Plans Pricing**

## Tags

Grammar, Language, Proofreading, Spell Check, Style Check, Text Analysis

---

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