Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add managedcode/dotnet-skills --skill mcpgit clone --depth 1 https://github.com/managedcode/dotnet-skillsWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/managedcode/dotnet-skills/mcp)<a href="https://agentmods.dev/skills/managedcode/dotnet-skills/mcp"><img src="https://agentmods.dev/badge/skills/managedcode/dotnet-skills/mcp/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/managedcode/dotnet-skills/mcp"><img src="https://agentmods.dev/badge/skills/managedcode/dotnet-skills/mcp.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00123 | $0.03020 |
| Opus 5.5 | $0.00049 | $0.01208 |
| Sonnet 5.5 | $0.00025 | $0.00604 |
| Haiku 4.5 | $0.00012 | $0.00302 |
Grade A, and why
mcp scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 1mo ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
Copies of this mod
1 near-identical copy found in the catalogue:
- dotnet-mcp — 86% identical, 33 lines differ
How it starts
The opening of the file, as written. The whole thing — 230 lines — stays where its author put it; the contents beside it link to each section on GitHub.
MCP C# SDK for .NET
Trigger On
- building or consuming MCP servers from a .NET application or library
- choosing between stdio and HTTP transport for MCP
- exposing tools, resources, prompts, completions, or logging to an MCP host
- connecting a .NET app to an existing MCP server and passing discovered tools into
IChatClient - bootstrapping a minimal MCP client/server from the
.NET AIquickstarts or publishing a server to the MCP Registry - implementing capability-aware flows such as roots, sampling, elicitation, subscriptions, session resumption, or enterprise managed authorization
Use This Skill Instead Of
- Use
mcpwhen protocol interoperability is the requirement. - Use
microsoft-extensions-aiwhen you only need model/provider abstraction or local tool orchestration without the MCP wire protocol. - Use
microsoft-agent-frameworkwhen the main problem is agent orchestration; combine it withmcponly when those agents must consume or expose MCP endpoints. - Use the
.NET AIquickstarts for the very first vertical slice, then come back here to harden transport, capability negotiation, publishing, and host interoperability.
Documentation
- MCP C# SDK overview
- Getting Started
- API reference
- Conceptual docs
- Versioning policy
- Experimental APIs
- MCP C# SDK repository
- Model Context Protocol specification
References
Load only what the task needs:
- references/patterns.md - current server/client patterns, transports, capabilities, filters, and chat-client integration
- references/security.md - safe error handling, auth boundaries, stdio logging hygiene, and defensive tool/resource patterns
What ships with it
3 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 1mo ago First seen · 230 lines · 123 tokens per session scan A aa12c7be1b1b
mcp is a skill published in the GitHub repository managedcode/dotnet-skills (490 stars, last pushed 2d ago), licensed MIT. It adds 123 tokens to every session and 3,020 once invoked, about $0.0005 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.
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