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Top 23 C# openai Projects
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Projects that involve AI integration increasingly shape everyday development. One such project is Semantic Kernel. It's an SDK for building AI agents and orchestrating LLM scenarios, and Microsoft actively develops it.
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ReSharper
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unity-mcp
Unity MCP acts as a bridge between AI assistants and your Unity Editor. Give your LLM tools to manage assets, control scenes, edit scripts, and automate tasks within Unity.
Community projects, like those from CoplayDev and CoderGamester, focus on speed and flexibility. They expose many parts of the Unity editor as MCP tools, which makes them great for experimentation and fast iteration.
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Everywhere
Context-aware AI assistant for your desktop. Ready to respond intelligently, seamlessly integrating multiple LLMs and MCP tools.
Project mention: 10 Powerful Open Source AI Tools You Won’t Believe Are Still Free in 2026 | dev.to | 2025-11-03Supported Platforms: Windows, macOS, Linux GitHub Repository: https://github.com/DearVa/Everywhere
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Unity-MCP
AI Skills, MCP Tools, and CLI for Unity Engine. Full AI develop and test loop. Use cli for quick setup. Efficient token usage, advanced tools. Any C# method may be turned into a tool by a single line. Works with Claude Code, Gemini, Copilot, Cursor and any other absolutely for free. (by IvanMurzak)
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SaaSHub
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mcp-unity
Model Context Protocol (MCP) plugin to connect with Unity Editor — designed for Cursor, Claude Code, Codex, Windsurf and other IDEs
Community projects, like those from CoplayDev and CoderGamester, focus on speed and flexibility. They expose many parts of the Unity editor as MCP tools, which makes them great for experimentation and fast iteration.
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I created Hyperlambda (https://hyperlambda.dev), so I spend a lot of time thinking about accidental complexity and implementation surface area. One thing leaks like this keep reminding me is that a surprising amount of software risk comes from packaging and delivery details rather than the main logic people spend all their time reviewing.
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LangChain
C# implementation of LangChain. We try to be as close to the original as possible in terms of abstractions, but are open to new entities. (by tryAGI)
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OpenAI-Unity
An unofficial OpenAI Unity Package that aims to help you use OpenAI API directly in Unity Game engine.
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Provider-side metadata. Both major providers expose per-user tagging. OpenAI accepts a user parameter on the Chat Completions and Responses APIs, and the OpenAI Usage API (launched December 2024) supports group_by=user_id for programmatic per-user cost breakdown. The Costs endpoint requires an admin key. Anthropic accepts metadata.user_id on every API request, capped at 256 characters and explicitly not for PII. The trade-off: provider metadata is the lowest friction, but it is provider-tied and does not show real-time per-customer running totals inside the application. (Side note: the request-to-Usage-API binding for OpenAI's user parameter should be re-verified against the live API reference before treating it as definitive.)
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Someone already made a Clippy AI Assistant as kind of a joke I think. :) https://github.com/FireCubeStudios/Clippy
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blazork8s
manage k8s using c# blazor enhance by chatgpt ,try something new ！使用blazor技术开发的内置OpenAI GPT的k8s 管理界面
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Project mention: Building for Europe? Meet Bielik (Open-Source LLM Made in Poland). | dev.to | 2026-01-06
MaIN.NET is being built with the .NET community. If you’re experimenting with Bielik (or any local/open model), join in: star the project, drop feedback in issues, or share your use case so others can learn from it. Check out the repo on GitHub.
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AIConnectors
Unity C# API connections to StableDiffusion (Automatic1111, Stability.ai SDXL, Replicate.com), Dall-E, ChatGPT/ GPT-4, and possibly others in the future.
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NOTE:
The open source projects on this list are ordered by number of github stars.
The number of mentions indicates repo mentiontions in the last 12 Months or
since we started tracking (Dec 2020).
C# openai discussion
C# openai related posts
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AI integrations: Rely or verify? Checking Semantic Kernel
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Beginner guide for anyone on ChatGPT who has never touched CODEX before. No terminal, no tech talk. Ten easy steps with a plain explanation and a tip
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LiteLLM Proxy: The Open-Source Alternative for Multi-Provider LLM Failover and Load Balancing
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Anthropic Beat the Pentagon in Court — Here's Why It Matters
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Anthropic's $60B IPO Bet: What October Means for AI
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Functioning Open Source Version of Lovable/Bolt/Replit
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MCPConnect (EN)
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A note from our sponsor - SaaSHub
www.saashub.com | 9 Jun 2026
Index
What are some of the best open-source openai projects in C#? This list will help you:
| # | Project | Stars |
|---|---|---|
| 1 | semantic-kernel | 28,055 |
| 2 | unity-mcp | 10,377 |
| 3 | Everywhere | 6,004 |
| 4 | Unity-MCP | 3,016 |
| 5 | openai | 3,006 |
| 6 | openai-dotnet | 2,625 |
| 7 | OpenAI-API-dotnet | 1,894 |
| 8 | mcp-unity | 1,749 |
| 9 | magic | 1,143 |
| 10 | LangChain | 1,041 |
| 11 | OpenAI-Unity | 845 |
| 12 | OpenAI-DotNet | 761 |
| 13 | whisper.unity | 709 |
| 14 | com.openai.unity | 595 |
| 15 | Clippy | 411 |
| 16 | ChatGPT.Net | 386 |
| 17 | blazork8s | 196 |
| 18 | skunit | 177 |
| 19 | MaIN.NET | 178 |
| 20 | OpenAI.Net | 126 |
| 21 | Cledev.OpenAI | 125 |
| 22 | AIConnectors | 102 |
| 23 | GPT-Codemaster | 63 |
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