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LanguageTool API

by LanguageTool Free tier

Check texts for style and grammar issues with <a href='https://languagetool.org'>LanguageTool</a>. Please consider the following default limitations:<ul><li>your daily request limit depending on <a href='https://languagetool.org/editor/settings/access-tokens'>your plan</a> <li>maximum number of requ

ailanguagetool

Quick Reference

Base URL https://api.languagetoolplus.com/v2 Auth type none Auth header # No auth required Rate limit See documentation Pricing Enterprise / contact sales Free quota None Documentation https://api.languagetoolplus.com/v2 Endpoint status Server online — HTTP 400 — server is online but path returned an error (may require auth)1.56s (checked Mar 29, 2026) Builder score D 43% builder-friendly
Pricing
28
Latency
30
Depth
64

Authentication

No authentication required

# No auth required

Pricing

Model subscription Starting price Enterprise / contact sales Free quota None

Free — open public API, no authentication required.

Key Endpoints

MethodPathDescription
POST /check Check a text
GET /languages Get a list of supported languages.
GET /words List words in dictionaries
POST /words/add Add word to a dictionary
POST /words/delete Remove word from a dictionary

Sample Request

curl -X GET 'https://api.languagetoolplus.com/v2/check' \
  -H '# No auth required'

Sample Response

{}

Data sourced from API Map. Always verify pricing and rate limits against the official LanguageTool documentation.