Microsoft team has announced the release of version 1.0 of their official Model Context Protocol (MCP) C# SDK, bringing full support for the 2025-11-25 version of the MCP Specification.
The new version introduces several notable capabilities aimed at developers building MCP servers and clients in .NET. As stated, one of the most significant additions is enhanced authorization server discovery.
Under the updated specification, servers can now expose Protected Resource Metadata through three different methods, offering more flexibility compared to the single method previously required. The SDK handles the full discovery process on the client side automatically.
The release also adds icon support for tools, resources, and prompts. Developers can now assign…