Tree-sitter MCP Server

Lets an assistant parse a code snippet with Tree-sitter and inspect the resulting syntax tree, including node kinds, field names, and positions.

What it does

Exposes a single tool, get_tree_sitter_ast, which takes a code string and a language name and returns the Tree-sitter syntax tree, one named node per line, with field names and zero-based row-column ranges. ERROR and MISSING nodes flag syntax errors. It supports many languages, including C, C++, C#, Go, GraphQL, HCL, Java, JavaScript, JSON, JSX, Kotlin, PHP, Prisma, Protobuf, Python, Ruby, Rust, SQL, Swift, Terraform, Thrift, TOML, TSX, TypeScript, and YAML, with case-insensitive names and common aliases.

When to use it

Useful when an assistant is writing Tree-sitter queries or code that walks a syntax tree and needs to confirm exact node kinds, field names, and positions for a snippet. It is a small, focused helper for parser-related development work rather than a general code analysis tool.

Requirements

Runs locally over stdio. The npm package is started with npx, which needs Node.js; alternatively install the binary with cargo or from the releases and use tree-sitter-mcp-server as the command. No accounts, API keys, or environment variables are declared.