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Tree-sitter MCP Server

Official registry Developer tools

Parse code into Tree-sitter ASTs to see node kinds, field names, and positions

Source code Website Documentation

Install

Add this to your client's MCP configuration (Claude Desktop: claude_desktop_config.json; Cursor: .cursor/mcp.json; VS Code and others use the same "mcpServers" shape).

NPM package tree-sitter-mcp-server
Claude Code 
claude mcp add tree-sitter-mcp-server -- npx -y tree-sitter-mcp-server@0.1.0
JSON configuration (Claude Desktop, Cursor, VS Code) 
{
    "mcpServers": {
        "tree-sitter-mcp-server": {
            "command": "npx",
            "args": [
                "-y",
                "tree-sitter-mcp-server@0.1.0"
            ]
        }
    }
}
CARGO package tree-sitter-mcp-server

Documentation

From the project's README on GitHub, refreshed weekly. Links open on GitHub.

Contents
  1. Tree-sitter MCP Server
  2. Installation
  3. Supported Languages
  4. Tool

Tree-sitter MCP Server

An MCP server that shows coding agents the Tree-sitter syntax tree of a code snippet, so they can check node kinds, field names, and positions before writing Tree-sitter queries or code that walks a syntax tree.

Installation

Claude Code:

claude mcp add tree-sitter -- npx -y tree-sitter-mcp-server

Codex:

codex mcp add tree-sitter -- npx -y tree-sitter-mcp-server

Other clients:

{
  "mcpServers": {
    "tree-sitter": {
      "command": "npx",
      "args": ["-y", "tree-sitter-mcp-server"]
    }
  }
}

npx needs Node.js. Without it, install the binary with cargo install --locked tree-sitter-mcp-server or download it from the releases, and use tree-sitter-mcp-server as the command.

Clients that browse the MCP Registry, such as VS Code, can also install it from there.

mcp-name: io.github.joowani/tree-sitter-mcp-server

Supported Languages

c, cpp, csharp, go, graphql, hcl, java, javascript, json, jsx, kotlin, php, prisma, protobuf, python, ruby, rust, sql, swift, terraform, thrift, toml, tsx, typescript, yaml

Names are case-insensitive, and common aliases such as c++, c#, py, and ts also work. javascript and jsx use the TypeScript and TSX grammars, and terraform uses the HCL grammar. PHP code must start with <?php.

Tool

get_tree_sitter_ast returns the syntax tree of code in language, one named node per line, with field names and zero-based (row-column) ranges. ERROR and MISSING nodes mark syntax errors.

{
  "language": "python",
  "code": "x = 1"
}
module (0-0) - (0-5)
  expression_statement (0-0) - (0-5)
    assignment (0-0) - (0-5)
      left: identifier (0-0) - (0-1)
      right: integer (0-4) - (0-5)

Frequently asked questions

What is Tree-sitter MCP Server?

Parse code into Tree-sitter ASTs to see node kinds, field names, and positions

How do I install Tree-sitter MCP Server?

It runs on your machine. In Claude Code: claude mcp add tree-sitter-mcp-server -- npx -y tree-sitter-mcp-server@0.1.0. For other clients, paste the JSON configuration from this page into their MCP settings.

Does Tree-sitter MCP Server need an API key?

Its registry entry lists no required key or secret. Some features may still need an account with the service it connects to.

Is Tree-sitter MCP Server open source?

Yes. Its code is on GitHub under the MIT license.

Who maintains Tree-sitter MCP Server?

It is published by joowani. AI.tn lists it but does not maintain or endorse it.

From the official MCP Registry. Listing is not an endorsement: review a server's code and permissions before giving it access to your data.