RunJS: an OSS MCP server to run LLM generated JS in .NET (link in post)

Introducing RunJS: An Open-Source MCP Server for Executing LLM-Generated JavaScript in .NET

In the evolving landscape of software development, leveraging large language models (LLMs) to generate and execute code has opened new avenues for automation and data processing. Recognizing this trend, the RunJS project offers a robust solution: an open-source MCP (Multi-Client Protocol) server designed in C# and .NET that enables seamless execution of JavaScript code generated by language models.

What is RunJS?

RunJS is a lightweight, yet powerful server application that allows LLMs to produce and run arbitrary JavaScript scripts within a secure and controlled environment. This capability is particularly valuable in scenarios requiring dynamic data manipulation, API interactions, and complex processing pipelines, all driven by generated code.

Core Functionality and Features

JavaScript Execution within .NET: At the heart of RunJS is Jint, a JavaScript interpreter for .NET. This integration facilitates the execution of JavaScript code directly within the server environment, ensuring high performance and compatibility.
Interoperability Between .NET and JavaScript: RunJS provides a seamless bridge between the .NET runtime and JavaScript, allowing for complex interactions and data exchange during script execution.
Enhanced API Access with Fetch Analogue: To support real-world data interactions, the project includes a custom fetch-like function. This feature enables scripts to perform API calls, making it possible to fetch data, submit requests, or interact with external services directly from generated JavaScript.

Practical Use Cases

RunJS caters to various scenarios, including but not limited to:

Processing and transforming API responses
Executing dynamically generated scripts for data analysis
Integrating with third-party APIs in a flexible manner
Automating workflows that depend on code snippets generated by LLMs

Ready to Try?

The project also features a test application built with Vercel’s AI SDK, allowing users to experiment with RunJS’s capabilities easily. Note that an OpenAI API key is required to utilize the demo, but it provides a straightforward way to explore the server’s functionalities firsthand.

Get Started

Discover more about RunJS and contribute to its development by visiting the project’s GitHub repository: RunJS on GitHub.

Harness the power of LLM-generated JavaScript within