LanguageTool API
Reference & KnowledgeAccess LanguageTool public data through one AllAPI key — 2 endpoints across the LanguageTool surface. No LanguageTool account, no credentials, no scraping stack — one anonymous request returns real data or a documented honest error, never fabricated.
| Method | Endpoint | Operation |
|---|---|---|
| GET | /api/language_tool/check | Check |
| GET | /api/language_tool/languages | Languages |
Call the LanguageTool API in one line
Free tier — 200 credits/month, no card. One key works across all 468 platforms, 39 MCP tools and 48 composites.
Get your free key → API reference