LanguageTool

About LanguageTool

LanguageTool provides a REST API for checking text for grammar and style issues, accessible via api.languagetoolplus.com/v2. Core endpoints include checking a text, retrieving supported languages, and listing, adding, or deleting words in dictionaries.

Usage is subject to default limits that vary by plan: requests per minute, characters per minute, and characters per request are all capped, with higher thresholds available on the Premium tier than the free tier. Higher limits than either tier offers are available through separate proofreading API plans.

The API is suited for developers integrating grammar and style checking into applications, such as text editors or writing tools, that need programmatic access to language-checking functionality and dictionary management.

Key features

• Grammar and style checking via REST API
• Text checking endpoint (POST /check)
• Supports multiple languages (GET /languages)
• Personal dictionary management (list, add, delete words)

Frequently asked questions