tinystruct MCP project

tinystruct MCP is a demonstration project that showcases how to develop Model Context Protocol (MCP) tools using the tinystruct framework. It provides a modular Java-based MCP server with built-in tools for file system management and GitHub operations.

This project is designed to bridge the gap between Large Language Models (LLMs) and external systems, enabling AI agents to interact with the physical file system and version control systems securely and efficiently.

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Key Features

• Modular Architecture: Built with Maven, allowing for easy expansion and isolation of tool sets.
• Annotation-Driven: Simplify tool development using @Action and @Argument annotations for automatic schema generation.
• Ready-to-Use Tools: Includes robust implementations for Git, GitHub API, and local FileSystem operations.
• Extensible Design: Inherits the flexibility of the tinystruct framework for building high-performance Java applications.
• Standardized Communication: Uses org.tinystruct.data.component.Builder for consistent JSON-based interaction.

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Project Structure

The project is organized into submodules, each representing a specific domain of tools:

• github/: Implements Git operations (clone, pull, push, status) and GitHub API integrations (issues, PRs, actions).
• filesystem/: Provides comprehensive local file system management (read, write, copy, move, delete, list).
• database/: Provides database connectivity and operations (query, insert, update, delete, describe).
• websearch/: Provides web search capabilities using DuckDuckGo Instant Answer API.
• bin/: Contains scripts for server management and dispatching commands.

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Getting Started

Prerequisites

• Java 17 or higher
• Maven 3.8+

1. Build the Project

Clone the repository and build the modules using Maven:

git clone https://github.com/tinystruct/tinystruct-mcp.git
cd tinystruct-mcp
mvn clean install

2. Start the MCP Server

You can start the server programmatically or via the command line.

Command Line (CLI)

Use the bin/dispatcher (for Linux/macOS) or bin/dispatcher.cmd (for Windows) script to start the server:

# On Linux / macOS
bin/dispatcher start --import org.tinystruct.system.HttpServer --import org.tinystruct.mcp.GitHub --import org.tinystruct.mcp.FileSystem --import org.tinystruct.mcp.Database --import org.tinystruct.mcp.websearch.WebSearch --server-port 777
# On Windows
bin\dispatcher.cmd start --import org.tinystruct.system.HttpServer --import org.tinystruct.mcp.GitHub --import org.tinystruct.mcp.FileSystem --import org.tinystruct.mcp.Database --import org.tinystruct.mcp.websearch.WebSearch --server-port 777

Programmatic Startup (Java)

Include the following in your Main class to boot the server with integrated tools:

importorg.tinystruct.ApplicationContext;
importorg.tinystruct.application.Context;
importorg.tinystruct.system.ApplicationManager;
importorg.tinystruct.system.HttpServer;
importorg.tinystruct.mcp.GitHub;
importorg.tinystruct.mcp.FileSystem;
importorg.tinystruct.mcp.Database;
importorg.tinystruct.mcp.websearch.WebSearch;
publicclassMain {
publicstaticvoidmain(String[] args) {
Contextctx = newApplicationContext();
ctx.setAttribute("--server-port", "777");
ApplicationManager.init();
ApplicationManager.install(newGitHub());
ApplicationManager.install(newFileSystem());
ApplicationManager.install(newDatabase());
ApplicationManager.install(newWebSearch());
ApplicationManager.install(newHttpServer());
ApplicationManager.call("start", ctx);
}
}

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Built-in Tools

GitHub Tool (github/)

Action	Description
github/clone	Clone a Git repository
github/pull	Pull changes from a remote repository
github/push	Push changes to a remote repository
github/status	Get the current status of a local repository
github/issues	Fetch GitHub issues for a repository
github/prs	Fetch GitHub pull requests
github/actions	List GitHub Actions workflows

FileSystem Tool (filesystem/)

Action	Description
filesystem/info	Get metadata about a file or directory
filesystem/exists	Check if a path exists
filesystem/read	Read contents of a file (UTF-8 or Base64)
filesystem/write	Write content to a file (overwrite or append)
filesystem/list	List items in a directory
filesystem/copy	Copy a file or directory
filesystem/move	Move or rename a file or directory
filesystem/delete	Delete a file or directory (recursive support)
filesystem/mkdir	Create a new directory

Database Tool (database/)

Action	Description
db/list-tables	List all tables in the connected database
db/describe	Describe the columns and types of a specific table
db/query	SELECT rows from a table with optional WHERE and LIMIT
db/insert	INSERT a row into a table
db/update	UPDATE rows in a table matching a WHERE clause
db/delete	DELETE rows from a table matching a WHERE clause
db/execute	Execute arbitrary SQL

WebSearch Tool (websearch/)

Action	Description
websearch/search	Perform a web search using DuckDuckGo Instant Answer API

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Developing Your Own Tools

Creating new MCP tools is straightforward. Simply extend the MCPTool class and annotate your methods.

@Action(value = "mytool/greet", description = "Greet a user", arguments = {
@Argument(key = "name", description = "User's name", type = "string")
})
publicStringgreet(Stringname) {
return"Hello, " + name + "!";
}

For a detailed guide on creating custom tools, check out DEVELOPING_TOOLS.md.

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License

This project is licensed under the Apache License 2.0. See the LICENSE file for details.

Note: MCP stands for Model Context Protocol.