a modern parsing library
If you already use Lark, the lark mcp server is the piece that lets your assistant work with it directly. a modern parsing library.
Lark is a parsing toolkit for Python, built with a focus on ergonomics, performance and modularity.
The toolset is worth reading before you wire it up, because it tells you what the integration is really for:
Beginners — Lark is very friendly for experimentation. It can parse any grammar you throw at it, no matter how complicated or ambiguous, and do so efficientlyExperts — Lark implements both Earley(SPPF) and LALR(1), and several different lexers, so you can trade-off power and speed, according to your requirements. ItLibrary — AlgorithmLark — Earley/LALR(1)Clones — These are implementations of Lark in other languages. They accept Lark grammars, and provide similar utilitiesInstallation goes through your MCP client rather than a global install: point it at lark on PyPI and it is fetched when the client starts. The copy-paste blocks for Claude Desktop, Claude Code and Cursor are further down this page.
Among the developer tooling options, the useful question is rarely "what can it do" but "what does it cost you to run" — permissions, credentials, and how much of your context its toolset consumes. Lark's toolset — Beginners, Experts, Library and 2 more — is a fair guide to whether it matches your workflow.
SyncDev reviews every entry in this directory against the project's own documentation before publishing, and revisits them as servers change.
| Tool | What it does |
|---|---|
| Beginners | Lark is very friendly for experimentation. It can parse any grammar you throw at it, no matter how complicated or ambiguous, and do so efficiently. It also constructs an annotated parse-tree for you, using only the gramm |
| Experts | Lark implements both Earley(SPPF) and LALR(1), and several different lexers, so you can trade-off power and speed, according to your requirements. It also provides a variety of sophisticated features and utilities. |
| Library | Algorithm |
| Lark | Earley/LALR(1) |
| Clones | These are implementations of Lark in other languages. They accept Lark grammars, and provide similar utilities. |
{
"mcpServers": {
"lark-1": {
"command": "uvx",
"args": ["lark"]
}
}
}Add to claude_desktop_config.json, then restart Claude Desktop.
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