--- title: Build Custom Unity MCP Tools for Coding Agents | daily.dev description: A walkthrough on building custom MCP (Model Context Protocol) tools for Unity using the Unity AI Assistant's built-in MCP relay server. Covers installing the... canonical: https://daily.dev/posts/build-custom-unity-mcp-tools-for-coding-agents-dvqp5xrbm twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Build Custom Unity MCP Tools for Coding Agents | daily.dev og:description: A walkthrough on building custom MCP (Model Context Protocol) tools for Unity using the Unity AI Assistant's built-in MCP relay server. Covers installing the... og:url: https://daily.dev/posts/build-custom-unity-mcp-tools-for-coding-agents-dvqp5xrbm og:image: https://api.daily.dev/og/posts/Dvqp5Xrbm.png og:image:alt: Build Custom Unity MCP Tools for Coding Agents og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Build Custom Unity MCP Tools for Coding Agents **[git-amend](https://daily.dev/sources/git-amend)** · 11 min read · 0 upvotes · 0 comments ## Summary A walkthrough on building custom MCP (Model Context Protocol) tools for Unity using the Unity AI Assistant's built-in MCP relay server. Covers installing the Unity AI package, connecting Cursor as a coding agent, and writing a custom C# static class with the MCPTool attribute to convert materials between render pipelines. Demonstrates handling input parameters, validation, error responses, and structured success responses. Also briefly introduces Unity MCP Pro, a third-party plugin with 280+ pre-built tools available on itch.io. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [MCP Tool Integration in Microsoft Agent Framework in C\#](https://daily.dev/posts/mcp-tool-integration-in-microsoft-agent-framework-in-c--9hfnimogq) · We Are .NET · 0 upvotes · 0 comments --- Tags: [#game-development](https://daily.dev/tags/game-development), [#ai-agents](https://daily.dev/tags/ai-agents), [#unity](https://daily.dev/tags/unity), [#mcp](https://daily.dev/tags/mcp) [View this post on daily.dev](https://daily.dev/posts/build-custom-unity-mcp-tools-for-coding-agents-dvqp5xrbm) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"Build Custom Unity MCP Tools for Coding Agents","url":"https://daily.dev/posts/build-custom-unity-mcp-tools-for-coding-agents-dvqp5xrbm","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/build-custom-unity-mcp-tools-for-coding-agents-dvqp5xrbm"},"datePublished":"2026-07-19T07:58:59.697Z","dateModified":"2026-07-19T09:46:26.969Z","description":"A walkthrough on building custom MCP (Model Context Protocol) tools for Unity using the Unity AI Assistant's built-in MCP relay server. 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