--- title: Microsoft updates MCP C# SDK for stateless MCP | daily.dev description: Microsoft released MCP C# SDK v2.0, implementing the 2026-07-28 revision of the Model Context Protocol specification — described as the protocol's largest... canonical: https://daily.dev/posts/microsoft-updates-mcp-c-sdk-for-stateless-mcp-ma3fceqwp twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Microsoft updates MCP C# SDK for stateless MCP | daily.dev og:description: Microsoft released MCP C# SDK v2.0, implementing the 2026-07-28 revision of the Model Context Protocol specification — described as the protocol's largest... og:url: https://daily.dev/posts/microsoft-updates-mcp-c-sdk-for-stateless-mcp-ma3fceqwp og:image: https://api.daily.dev/og/posts/Ma3fcEQwP.png og:image:alt: Microsoft updates MCP C# SDK for stateless MCP 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. # Microsoft updates MCP C# SDK for stateless MCP **[InfoWorld](https://daily.dev/sources/infoworld)** · 2 min read · 0 upvotes · 0 comments ## Summary Microsoft released MCP C# SDK v2.0, implementing the 2026-07-28 revision of the Model Context Protocol specification — described as the protocol's largest revision since launch. Key changes include stateless HTTP transport by default (HttpServerTransportOptions.Stateless now defaults to true), standardized HTTP headers enabling ordinary infrastructure like load balancers and WAFs to route MCP traffic without deep packet inspection, and support for Multi Round-Trip Requests (MRTR) that allow multi-step tool interactions without requiring long-lived sessions. The next focus for the SDK is end-to-end authentication and authorization, building on OAuth and OpenID Connect alignment introduced in the new spec. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [Microsoft Releases MCP C\# SDK v2.0 for .NET](https://daily.dev/posts/microsoft-releases-mcp-c-sdk-v2-0-for-net-exvllbkk4) · C\# Corner · 47 upvotes · 4 comments - [Release v1.0 of the official MCP C\# SDK](https://daily.dev/posts/release-v1-0-of-the-official-mcp-c-sdk-y53o7hb5x) · ASP.NET Blog · 19 upvotes · 1 comments - [Build Your First MCP Server in C\# with the Official SDK](https://daily.dev/posts/build-your-first-mcp-server-in-c-with-the-official-sdk-gfvr6bvsh) · Code with Mukesh · 17 upvotes · 2 comments - [MCP is now stateless: what the 2026-07-28 update changes](https://daily.dev/posts/mcp-is-now-stateless-what-the-2026-07-28-update-changes-hc2vhg5ll) · Flavio Copes · 9 upvotes · 0 comments --- Tags: [#.net](https://daily.dev/tags/.net), [#c#](https://daily.dev/tags/c#), [#mcp](https://daily.dev/tags/mcp) [View this post on daily.dev](https://daily.dev/posts/microsoft-updates-mcp-c-sdk-for-stateless-mcp-ma3fceqwp) ```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":"Microsoft updates MCP C# SDK for stateless MCP","url":"https://daily.dev/posts/microsoft-updates-mcp-c-sdk-for-stateless-mcp-ma3fceqwp","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/microsoft-updates-mcp-c-sdk-for-stateless-mcp-ma3fceqwp"},"datePublished":"2026-07-29T21:56:35.616Z","dateModified":"2026-07-30T12:54:42.126Z","description":"Microsoft released MCP C# SDK v2.0, implementing the 2026-07-28 revision of the Model Context Protocol specification — described as the protocol's largest...","image":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/6fdd1c2d2a5e2f168923eb153904a6a2?_a=AQAEuop","thumbnailUrl":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/6fdd1c2d2a5e2f168923eb153904a6a2?_a=AQAEuop","isAccessibleForFree":true,"articleSection":"InfoWorld","inLanguage":"en","publisher":{"@type":"Organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180}},"author":{"@type":"Organization","name":"InfoWorld","logo":"https://media.daily.dev/image/upload/t_logo,f_auto/v1/logos/bf6d68a999064029b0bb09aa6268f1f3","url":"https://daily.dev/sources/infoworld"},"commentCount":0,"discussionUrl":"https://daily.dev/posts/microsoft-updates-mcp-c-sdk-for-stateless-mcp-ma3fceqwp","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":0},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":".net,c#,mcp","timeRequired":"PT2M"} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"InfoWorld","item":"https://daily.dev/sources/infoworld"},{"@type":"ListItem","position":3,"name":"Microsoft updates MCP C# SDK for stateless MCP"}]} ```