A Cloudflare Worker that serves as an MCP (Model Context Protocol) server for code explanation. It analyzes and explains code with a comprehensive breakdown of structure and functionality.

• Architecture Diagram: Generates an ASCII diagram showing the overall structure, relationships between components, and data flow.
• Core Functionality Analysis: Identifies and explains the primary purpose of the code based on pattern recognition.
• Component Breakdown: Lists all main classes and functions with brief descriptions of their roles.
• Multi-language Support: Analyzes code in various programming languages including JavaScript, TypeScript, Python, Java, C#, and more.
• JSDoc/Docstring Recognition: Extracts and utilizes existing documentation in the code.
• Secure API: Bearer token authentication to secure your endpoints.

The Code Explainer analyzes source code using a combination of techniques:

1. Pattern Recognition: Identifies code structures and common patterns
2. Relationship Analysis: Maps dependencies between components
3. Documentation Extraction: Prioritizes existing documentation comments
4. Architecture Visualization: Creates ASCII diagrams of the code structure
5. Component Description: Provides semantic descriptions of functions and classes

All processing happens within the Cloudflare Worker with no external dependencies.

• Node.js (version 12 or higher)
• Wrangler (Cloudflare Workers CLI)
• A Cloudflare account

1. Clone this repository:

   git clone https://github.com/BillDuke13/code-explainer-mcp.git cd code-explainer-mcp

2. Install dependencies:

   npm install

3. Configure your secret key:

   • Edit wrangler.jsonc and replace YOUR_SECRET_KEY_HERE with your chosen secret key, or
   • Use Cloudflare secrets (recommended for production):

     wrangler secret put SHARED_SECRET

4. Deploy to Cloudflare Workers:

   npm run deploy

Send a POST request to your worker URL with the following JSON body:

{ "method": "explainCode", "params": ["your code here", "programming language"] }

Include the Authorization header with your secret key:

Authorization: Bearer YOUR_SECRET_KEY_HERE 

The response will be a JSON object with a result field containing the code analysis:

{ "result": "# Code Analysis for JavaScript Code\n\n## Architecture Diagram\n...\n\n## Core Functionality\n..." }

async function explainCode(code, language) { const response = await fetch('https://your-worker-url.workers.dev', { method: 'POST', headers: { 'Content-Type': 'application/json', 'Authorization': 'Bearer YOUR_SECRET_KEY_HERE', }, body: JSON.stringify({ method: "explainCode", params: [code, language] }), }); if (!response.ok) { throw new Error(`HTTP error! status: ${response.status}`); } const data = await response.json(); return data.result; } // Example usage const jsCode = `function add(a, b) { return a + b; }`; explainCode(jsCode, "javascript") .then(explanation => console.log(explanation)) .catch(error => console.error('Error:', error));

import requests import json def explain_code(code, language, api_url, secret_key): headers = { 'Content-Type': 'application/json', 'Authorization': f'Bearer {secret_key}' } payload = { 'method': 'explainCode', 'params': [code, language] } response = requests.post(api_url, headers=headers, json=payload) response.raise_for_status() return response.json()['result'] # Example usage code = "def hello(): print('Hello, world!')" explanation = explain_code(code, "python", "https://your-worker-url.workers.dev", "YOUR_SECRET_KEY_HERE") print(explanation)

const axios = require('axios'); async function explainCode(code, language) { try { const response = await axios.post('https://your-worker-url.workers.dev', { method: 'explainCode', params: [code, language] }, { headers: { 'Content-Type': 'application/json', 'Authorization': 'Bearer YOUR_SECRET_KEY_HERE' } }); return response.data.result; } catch (error) { console.error('Error:', error.response ? error.response.data : error.message); throw error; } } // Example usage const codeToAnalyze = ` class Person {  constructor(name) {  this.name = name;  }    sayHello() {  return \`Hello, my name is \${this.name}\`;  } } `; explainCode(codeToAnalyze, 'javascript') .then(explanation => console.log(explanation)) .catch(err => console.error('Failed to explain code:', err));

1. Clone the repository and install dependencies:

   git clone https://github.com/BillDuke13/code-explainer-mcp.git cd code-explainer-mcp npm install

2. Run the development server:

   wrangler dev

3. Test the endpoint locally:

   curl -X POST http://localhost:8787 \ -H "Content-Type: application/json" \ -H "Authorization: Bearer YOUR_SECRET_KEY_HERE" \ -d '{"method":"explainCode","params":["function hello() { return \"Hello World\"; }","javascript"]}'

• Follow TypeScript best practices
• Add comments for complex logic
• Update documentation for public API changes
• Add tests for new features

• The API is secured with Bearer token authentication
• Use environment secrets for storing the shared secret in production
• Do not commit your actual secret key to version control
• Rate limiting is recommended for production deployments

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