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Add stateless doc, prefer stateless mode and disable legacy SSE by default (#1468)

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Stephen Halter 2026-03-27 13:56:16 -07:00 • committed by GitHub
commit 8eb4023c20
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2 changed files with 1440 additions and 73 deletions
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2
docs/concepts/logging/logging.md
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@ -46,7 +46,7 @@ MCP servers that implement the Logging utility must declare this in the capabili
[Initialization]: https://modelcontextprotocol.io/specification/2025-11-25/basic/lifecycle#initialization
Servers built with the C# SDK always declare the logging capability. Doing so does not obligate the server
to send log messages—only allows it. Note that stateless MCP servers might not be capable of sending log
to send log messages—only allows it. Note that [stateless](xref:stateless) MCP servers might not be capable of sending log
messages as there might not be an open connection to the client on which the log messages could be sent.
The C# SDK provides an extension method <xref:Microsoft.Extensions.DependencyInjection.McpServerBuilderExtensions.WithSetLoggingLevelHandler*> on <xref:Microsoft.Extensions.DependencyInjection.IMcpServerBuilder> to allow the

7
docs/concepts/logging/samples/server/Program.cs
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@ -6,8 +6,11 @@ var builder = WebApplication.CreateBuilder(args);
builder.Services.AddMcpServer()
.WithHttpTransport(options =>
options.IdleTimeout = Timeout.InfiniteTimeSpan // Never timeout
)
{
// Log streaming requires stateful mode because the server pushes log notifications
// to clients. Set Stateless = false explicitly for forward compatibility.
options.Stateless = false;
})
.WithTools<LoggingTools>();
// .WithSetLoggingLevelHandler(async (ctx, ct) => new EmptyResult());