LexiLint MCP — Offline Spell Check & BYOK Grammar for AI Assistants
About
Spell and grammar checking for AI assistants via Model Context Protocol. 100% offline spell check (zero tokens, zero API calls) using nspell. BYOK grammar checking with your own Gemini, OpenAI, or Claude API key. Works with Claude Desktop, Cursor, ChatGPT, and any MCP-compatible
Details
- Author
- raunakkathuria
- Downloads
- 472
- Categories
- AI, Productivity
Jump to
- Offline spell check with zero token consumption.
- BYOK grammar check using Gemini, OpenAI, or Anthropic Claude.
- Supports 8 languages: English (US/UK), Spanish, French, German, Polish, Russian, Turkish.
- Works without internet for spell checking.
- No API calls or recurring costs for spell check.
Setting up with Highlight
This MCP is not yet compatible with Highlight’s one-click setup. However, you can still use it with Highlight by following these steps:
- Download and install Highlight from highlightai.com/download
- Navigate to the plugins tab and select "Add Custom Plugin"
-
Configure the plugin with the settings below
Plugin Name
LexiLint MCP — Offline Spell Check & BYOK Grammar for AI AssistantsCommand (node, npx, python, etc.)Please refer to the README for specific instructions on how to obtain API keys or other required environment variables.
- Enable "Start Automatically" if you want the plugin to start when Highlight launches
From the repository
Install by adding the server configuration to your mcpServers JSON object with the command npx -y lexilint-mcp. After configuration, the assistant can perform offline spell checks and grammar checks using your own API key.
spell_check
Check text for spelling errors. 100% offline — no API key needed. Supports en-US and en-GB.
grammar_check
Check text for grammar, style, and clarity issues. Free with Google Gemini (BYOK — get a free key at aistudio.google.com). OpenAI and Anthropic require LexiLint Premium.
check_text
Run spell check and optionally grammar check. Spell check (en-US/en-GB) is free and offline. Grammar with Gemini is free (BYOK). Multi-language and OpenAI/Anthropic require LexiLint Premium.
Claude Desktop / Cursor
Paste into your MCP client config file to install this server.
{
"mcpServers": {
"lexilint mcp \u2014 offline spell check & byok grammar for ai assistants": {
"lexilint": {
"command": "npx",
"args": [
"-y",
"lexilint-mcp"
]
}
}
}
}McpServers
{
"lexilint": {
"command": "npx",
"args": [
"-y",
"lexilint-mcp"
]
}
}LexiLint MCP
Spell and grammar checking for AI assistants via Model Context Protocol.Features
- Offline spell check — 100% local via nspell. Zero tokens consumed. Zero API calls. Works without internet. - BYOK grammar check — Use your own Gemini (free tier), OpenAI, or Anthropic Claude API key. Your text goes directly to your chosen provider. - 8 languages — English (US/UK), Spanish, French, German, Polish, Russian, Turkish - Zero token cost for spell check — Stop wasting AI tokens on typo detectionInstallation
``json
{
"mcpServers": {
"lexilint": {
"command": "npx",
"args": ["-y", "lexilint-mcp"]
}
}
}
``
Links
- npm package - Website - GitHubSign in to leave a review
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