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AST MCP Server

@angrysky56

Repository

Basic information

Category

Other

License

MIT

Transports

stdio

Author

angrysky56

About AST MCP Server

By transforming source code into a queryable Semantic Graph and a structured AST, this tool bridges the gap between "reading text" and "understanding structure." For an AI assistant, it provides the "spatial" awareness needed to navigate deep dependencies without getting lost in

#ast#asg#coding#claude#mcp-server

AST MCP Server config

Add this server to your MCP-compatible client using the configuration below.

{
  "mcpServers": {
    "ast-mcp-server": {
      "command": "uv",
      "args": [
        "sync"
      ]
    }
  }
}

AST MCP Server tools

Tool list not available yet

This listing does not currently have a tool list to display. This does not mean the server has no tools; check its documentation for supported capabilities.

We auto-extract tools from the README. The maintainer can list them under a ## Tools heading to populate this section.

Overview

What is AST MCP Server?

AST MCP Server is an MCP (Model Context Protocol) server that provides code structure and semantic analysis capabilities through Abstract Syntax Trees (AST) and Abstract Semantic Graphs (ASG). It supports multiple programming languages (Python, JavaScript, TypeScript, Go, Rust, C/C++, Java) and is compatible with Claude Desktop and other MCP clients.

How to use AST MCP Server?

Requires Python 3.9+ and either uv (recommended) or pip. Clone the repository, run uv sync then uv run build-parsers. Configure Claude Desktop by editing its configuration file and adding an MCP server entry with the absolute path to the server directory. Claude can then use tools like parse_to_ast, generate_asg, analyze_code, etc. to analyze code snippets or local files.

Key features of AST MCP Server

  • Parse code into Abstract Syntax Trees (AST)
  • Generate Abstract Semantic Graphs (ASG) from code
  • Analyze code structure and complexity
  • Support for multiple programming languages
  • Incremental parsing for large files
  • AST diffing to identify code changes
  • Resource caching for improved performance

Use cases of AST MCP Server

  • Analyze code structure in any supported language using Claude Desktop
  • Compare code versions using AST diffing
  • Cache analysis results for repeated queries
  • Use incremental parsing for large files
  • Locate specific nodes in code by line and column

Frequently asked questions

1

What languages does AST MCP Server support?

Python, JavaScript, TypeScript, Go, Rust, C, C++, and Java.

2

Where does data live?

All tool execution happens locally on your machine, with results returned to Claude for interpretation.

3

How do I configure Claude Desktop?

Edit the Claude Desktop configuration file (located at `~/Library/Application Support/claude-desktop/claude_desktop_config.json` on macOS, with similar paths on Linux and Windows) and add the AST MCP server entry with the absolute path to the server directory.

4

What are the prerequisites?

Python 3.9 or higher and the `uv` package manager (recommended) or pip.

5

How do I add support for a new language?

Install the corresponding tree-sitter language package, update the `LANGUAGE_MODULES` dictionary in `build_parsers.py` and `ast_mcp_server/tools.py`, then run `uv run build-parsers`.

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