modelcontextprotocol

modelcontextprotocol/csharp-sdk

The official C# SDK for Model Context Protocol servers and clients. Maintained in collaboration with Microsoft.

20 good first / help-wanted issues · C# · last activity Jul 18, 2026

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csharp dotnet mcp mcp-client mcp-server modelcontextprotocol
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20 Open Issues Need Help Last updated: Jul 18, 2026

Open Issues Need Help

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Not able to customize the url '.well-known/oauth-protected-resource' behind AKS/nginx ingress 6 days ago
bug help wanted area-auth P3
modelcontextprotocol/csharp-sdk
4.4K

The official C# SDK for Model Context Protocol servers and clients. Maintained in collaboration with Microsoft.

C#
#csharp#dotnet#mcp#mcp-client#mcp-server#modelcontextprotocol
JSON property-name casing is inconsistent between JSON-RPC envelope and request params 11 days ago
bug help wanted P3
modelcontextprotocol/csharp-sdk
4.4K

The official C# SDK for Model Context Protocol servers and clients. Maintained in collaboration with Microsoft.

C#
#csharp#dotnet#mcp#mcp-client#mcp-server#modelcontextprotocol
When Absolute Uri passed as McpAuthenticationOptions.ResourceMetadataUri, /.well-known/oauth-protected-resource endpoint returns 404 11 days ago
bug help wanted area-auth P3
modelcontextprotocol/csharp-sdk
4.4K

The official C# SDK for Model Context Protocol servers and clients. Maintained in collaboration with Microsoft.

C#
#csharp#dotnet#mcp#mcp-client#mcp-server#modelcontextprotocol
Tool Call Failed: Request timed out 23 days ago
bug help wanted needs repro P3
modelcontextprotocol/csharp-sdk
4.4K

The official C# SDK for Model Context Protocol servers and clients. Maintained in collaboration with Microsoft.

C#
#csharp#dotnet#mcp#mcp-client#mcp-server#modelcontextprotocol
Flaky on windows-latest: OAuth metadata fetch times out in in-memory tests (same class as #1701, not covered by #1702) 29 days ago
bug help wanted area-tests ready for work P3
modelcontextprotocol/csharp-sdk
4.4K

The official C# SDK for Model Context Protocol servers and clients. Maintained in collaboration with Microsoft.

C#
#csharp#dotnet#mcp#mcp-client#mcp-server#modelcontextprotocol
Make EverythingServer capable of running either stdio or http about 1 month ago
enhancement help wanted area-tests ready for work P3
modelcontextprotocol/csharp-sdk
4.4K

The official C# SDK for Model Context Protocol servers and clients. Maintained in collaboration with Microsoft.

C#
#csharp#dotnet#mcp#mcp-client#mcp-server#modelcontextprotocol
Streaming HTTP MCP server integration tests 2 months ago
documentation help wanted ready for work P3
modelcontextprotocol/csharp-sdk
4.4K

The official C# SDK for Model Context Protocol servers and clients. Maintained in collaboration with Microsoft.

C#
#csharp#dotnet#mcp#mcp-client#mcp-server#modelcontextprotocol
mcp.protocol.version activity tag not emitted on server spans in stateless HTTP mode 3 months ago
bug help wanted ready for work P2
modelcontextprotocol/csharp-sdk
4.4K

The official C# SDK for Model Context Protocol servers and clients. Maintained in collaboration with Microsoft.

C#
#csharp#dotnet#mcp#mcp-client#mcp-server#modelcontextprotocol
Request for Sample: ASP.NET Core MCP Client with One Persisted Connection Per User Session 3 months ago
documentation enhancement help wanted ready for work P3
modelcontextprotocol/csharp-sdk
4.4K

The official C# SDK for Model Context Protocol servers and clients. Maintained in collaboration with Microsoft.

C#
#csharp#dotnet#mcp#mcp-client#mcp-server#modelcontextprotocol
Provide an example of how to connect telemetry with Application Insights 3 months ago
documentation enhancement help wanted ready for work P3
modelcontextprotocol/csharp-sdk
4.4K

The official C# SDK for Model Context Protocol servers and clients. Maintained in collaboration with Microsoft.

C#
#csharp#dotnet#mcp#mcp-client#mcp-server#modelcontextprotocol
`Configuration` property shouldn't be read in Directory.Build.props 3 months ago
bug help wanted ready for work P3
modelcontextprotocol/csharp-sdk
4.4K

The official C# SDK for Model Context Protocol servers and clients. Maintained in collaboration with Microsoft.

C#
#csharp#dotnet#mcp#mcp-client#mcp-server#modelcontextprotocol
Returning an EmbeddedResourceBlock from a tool do not work with Claude Desktop 3 months ago
documentation enhancement help wanted ready for work P3
modelcontextprotocol/csharp-sdk
4.4K

The official C# SDK for Model Context Protocol servers and clients. Maintained in collaboration with Microsoft.

C#
#csharp#dotnet#mcp#mcp-client#mcp-server#modelcontextprotocol
Running ModelContextProtocol.Tests in net472 is causing VS test platform to hang 3 months ago
bug help wanted area-tests needs confirmation P3
modelcontextprotocol/csharp-sdk
4.4K

The official C# SDK for Model Context Protocol servers and clients. Maintained in collaboration with Microsoft.

C#
#csharp#dotnet#mcp#mcp-client#mcp-server#modelcontextprotocol
Passing a malformed body throws a 500 error instead of 400. Very hard to figure out what is incorrect in the request being issued by the caller 3 months ago
bug help wanted needs confirmation P3
modelcontextprotocol/csharp-sdk
4.4K

The official C# SDK for Model Context Protocol servers and clients. Maintained in collaboration with Microsoft.

C#
#csharp#dotnet#mcp#mcp-client#mcp-server#modelcontextprotocol
ProtectedMcpServer sample doesn't work with VSCode auth flow 3 months ago
bug help wanted area-auth needs confirmation P3
modelcontextprotocol/csharp-sdk
4.4K

The official C# SDK for Model Context Protocol servers and clients. Maintained in collaboration with Microsoft.

C#
#csharp#dotnet#mcp#mcp-client#mcp-server#modelcontextprotocol
Practical OAuth implementation for production 3 months ago
documentation enhancement help wanted area-auth ready for work P3
modelcontextprotocol/csharp-sdk
4.4K

The official C# SDK for Model Context Protocol servers and clients. Maintained in collaboration with Microsoft.

C#
#csharp#dotnet#mcp#mcp-client#mcp-server#modelcontextprotocol
notifications/tools/list_changed handler apparently times out over Streamable HTTP 3 months ago
bug help wanted ready for work P3
modelcontextprotocol/csharp-sdk
4.4K

The official C# SDK for Model Context Protocol servers and clients. Maintained in collaboration with Microsoft.

C#
#csharp#dotnet#mcp#mcp-client#mcp-server#modelcontextprotocol
Github copilot not setting bearer token on acces to tools. 3 months ago
bug help wanted area-auth needs confirmation P3
modelcontextprotocol/csharp-sdk
4.4K

The official C# SDK for Model Context Protocol servers and clients. Maintained in collaboration with Microsoft.

C#
#csharp#dotnet#mcp#mcp-client#mcp-server#modelcontextprotocol
Add client sample w/ guidance on wiring up dependency injection 3 months ago
documentation enhancement help wanted ready for work
modelcontextprotocol/csharp-sdk
4.4K

The official C# SDK for Model Context Protocol servers and clients. Maintained in collaboration with Microsoft.

C#
#csharp#dotnet#mcp#mcp-client#mcp-server#modelcontextprotocol
Flaky test host hang on Windows Debug CI: TaskCancellationIntegrationTests.TaskTool_CancellationToken_GetTaskShowsWorkingBeforeCancel 3 months ago
bug help wanted area-tests P3
modelcontextprotocol/csharp-sdk
4.4K

The official C# SDK for Model Context Protocol servers and clients. Maintained in collaboration with Microsoft.

C#
#csharp#dotnet#mcp#mcp-client#mcp-server#modelcontextprotocol