C# and .NET for Codex

705 mods tagged C# and .NET that install into Codex, measured the same four ways as everything else here: what each costs in tokens on every session, what a security scan found and why, whether it is the original, and what changed.

Also for Codex: anthropic · Git and workflow · Web3 and blockchain · Python · React · TypeScript · openai · android · Go · docker · bun · PostgreSQL

dotnet-mcp

25

jongalloway/dotnet-mcp

MCP server Claude CodeCodexCursor +2

MCP server "dotnet-mcp" as configured in jongalloway/dotnet-mcp. Launched with Community.Mcp.DotNet. Needs 2 environment variables to run.

not rated 36 +2 3d ago A tokens not measured original MIT

sharplens

26

pzalutski-pixel/sharplens-mcp

MCP server Claude CodeCodexCursor +2

67 semantic C#/.NET analysis tools via Roslyn: navigation, refactoring, codegen, audit. Runs locally from the sharplens-mcp npm package. Needs 3 environment variables to run.

not rated 33 +1 1mo ago A tokens not measured original MIT

vvvv-node-libraries

27

tebjan/vvvv-skills

Skill Claude CodeCodex

Helps set up C# library projects that provide nodes to vvvv gamma — project directory structure, Initialization.cs with AssemblyInitializer, service registration via RegisterService, IResourceProvider factories, ImportAsIs / ImportNamespace / ImportType selection, category organization, aspects…

not rated 32 changed 10d ago A 280 tokens

dotnet-debugging

28

jkolo/debug-mcp

Skill Claude CodeCodex

Debug .NET applications using debug-mcp MCP tools — launch processes, set breakpoints, step through code, inspect variables, evaluate expressions, and analyze exceptions. Use this skill when debugging .NET/C# applications, investigating runtime behavior, diagnosing exceptions, inspecting object state, or performing…

not rated 28 22d ago A 70 tokens AGPL-3.0

RudyCity/superagent

Skill Claude CodeCodex

Master C#/.NET backend development patterns for building robust APIs, MCP servers, and enterprise applications. Covers async/await, dependency injection, Entity Framework Core, Dapper, configuration, caching, and testing with xUnit. Use when developing .NET backends, reviewing C# code, or designing API architectures.

not rated 23 +2 6d ago A SkillSpector: pass 70 tokens original MIT

ilia-sokolov/OfficeAgent.NET

Skill Claude CodeCodex

Review and edit existing Word documents (.docx) through OfficeAgent with tracked changes, comments, revision decisions, table updates, footnotes, or page-layout changes. Use when a user asks to revise, redline, mark up, or resolve review state in an existing Word file. Do not use for read-only extraction…

not rated 22 +1 changed 7d ago A 78 tokens original MIT

lumeo

32

Brain2k-0005/Lumeo

Skill Claude CodeCodex

Use when building or editing a Blazor UI that uses the Lumeo component library (the Lumeo NuGet package and its satellites Lumeo.Charts / Lumeo.DataGrid / Lumeo.Editor / Lumeo.Scheduler / Lumeo.Gantt / Lumeo.Motion), or when the user mentions Lumeo components (Button, DataGrid, Sheet, Dialog, Tabs, DatePicker, Toast…

not rated 21 yesterday A SkillSpector: warn 125 tokens original MIT

flexcel-net

33

tmssoftware/skills

Skill Claude CodeCodex

Use when writing C# / VB.NET / F# code that reads, writes, manipulates, or exports Excel (.xlsx / .xls) files, generates PDF or HTML from Excel, or produces data-driven reports with FlexCel Studio for .NET (TMS Software). Triggers include Excel/xlsx from C#, XlsFile, FlexCelReport, FlexCelPdfExport, FlexCelHtmlExport…

not rated 14 5mo ago A 126 tokens

magna-nz/aspnetcore-debugger-mcp

MCP server Claude CodeCodexCursor +2

MCP server "aspnetcore-debugger-mcp" as configured in magna-nz/aspnetcore-debugger-mcp. Launched with AspNetCoreDebuggerMcp.

not rated 14 3d ago A tokens not measured original MIT

mailfathom

35

Krzysztof318/MailFathom

MCP server Claude CodeCodexCursor +2

Security-first, self-hosted email archive with search, cited answers, and sending for AI agents. Remote server at {mailfathom_host}.

not rated 14 yesterday A tokens not measured original AGPL-3.0

AspectGenerator

36

igor-tkachev/AspectGenerator

Skill Claude CodeCodex

Use this file as the compact agent-oriented guide for using and reviewing AspectGenerator in consuming projects.

not rated 11 2mo ago A 0 tokens original MIT

roslyn-mcp

37

fnrhombus/winforms-mcp

MCP server Claude CodeCodexCursor +2

MCP server "roslyn-mcp" as configured in fnrhombus/winforms-mcp. Launched with dotnet-roslyn-mcp.

not rated 11 +1 5mo ago A tokens not measured original MIT

dotnet-grpc

38

Postpartum-genushyacinthus29/dotnet-skills

Skill Claude CodeCodex

Build or review gRPC services and clients in .NET with correct contract-first design, streaming behavior, transport assumptions, and backend service integration.

not rated 10 yesterday A SkillSpector: pass 33 tokens original MIT

nxopen-mcp

39

mingfeng6684/nxopen-mcp

MCP server Claude CodeCodexCursor +2

MCP server that gives AI coding agents accurate NXOpen .NET API knowledge via hybrid retrieval. Runs locally from the nxopen-mcp Python package.

not rated 10 +2 2mo ago A tokens not measured original MIT

sinch/skills

Skill Claude CodeCodex

Write C#/.NET Sinch Functions with the Sinch.Functions.Runtime NuGet package. Use when writing or editing a function controller: answering and controlling calls, IVR menus, placing or bridging calls, SMS/WhatsApp/RCS webhooks, custom HTTP endpoints, dependency injection, cache/storage/database and authorization. Also…

not rated 10 changed 6d ago A 105 tokens original Apache-2.0

context7

41

Andes-Software-Solutions/Andes.Extensions.AI

MCP server Claude CodeCodexCursor +2

One of 2 in .mcp.json

Gives the agent up-to-date documentation and code examples for libraries and frameworks, fetched on demand so answers are not stuck at the model's training cutoff. Runs locally from the @upstash/context7-mcp npm package.

not rated 9 5d ago A tokens not measured copy · 86% MIT

dotnet-template-mcp

42

YuliiaKovalova/dotnet-template-mcp

MCP server Claude CodeCodexCursor +2

MCP server "dotnet-template-mcp" as configured in YuliiaKovalova/dotnet-template-mcp. Launched with DotnetTemplateMCP -y.

not rated 8 6d ago A tokens not measured original MIT

sumo-mcp

43

HypaSMarty/SUMO-MCP-Server

MCP server Claude CodeCodexCursor +2

MCP server "sumo-mcp" as configured in HypaSMarty/SUMO-MCP-Server. Runs locally from the sumo-mcp Python package.

not rated 8 today A tokens not measured original MIT

github

44

nachum-shmilovitz-66/claude-code-visualstudio

MCP server Claude CodeCodexCursor +2

GitHub's hosted MCP server: lets the agent search code, read and create issues and pull requests. Remote server at api.githubcopilot.com.

not rated 7 10d ago A tokens not measured copy · 92% MIT

netcoredbg-mcp

45

thebtf/netcoredbg-mcp

MCP server Claude CodeCodexCursor +2

MCP server for debugging C#/.NET code using netcoredbg. Runs locally from the netcoredbg-mcp Python package.

not rated 6 16d ago A tokens not measured original MIT

servicebricks

46

holomodular/ServiceBricks

MCP server Claude CodeCodexCursor +2

Generate a ServiceBricks C# .NET microservice as a ZIP file. Remote server at servicebricks.com.

not rated 5 7mo ago A tokens not measured original MIT

clojure-events

47

muthuishere/toolnexus

Skill Claude CodeCodex

Use when asked about Clojure community events, meetups or conferences. How to fetch and report them.

not rated 5 3d ago A 27 tokens original MIT

abp-dev

48

smss123/ABP-ai-skills

Skill Claude CodeCodex

Expert guide for developing applications with the ABP Framework (abp.io) using ASP.NET Core, DDD patterns, and Razor Pages / MVC UI. Use this skill whenever the user mentions ABP, abp.io, Volo.Abp, AbpModule, application services, aggregate roots, domain services, ABP CLI, IRepository, PermissionDefinitionProvider…

not rated 5 3mo ago A 171 tokens GPL-3.0

At most 3 mods per repository are shown here, and a mod shipped inside a plugin is left to that plugin's page — the rest are on their repository pages: