dotnet-webapi SKILL.md skillA

dotnet-webapi from dotnet/skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.

Install it, pinned
mdr add dotnet/skills/dotnet-webapi@git:20260608.2d163bb

Pins git:20260608.2d163bb in mdr.lock. Pin the fingerprint instead.

Audit grade
A, 17 of 17 checks passed
Kind
SKILL.md skill
Repository
dotnet/skills
Path
plugins/dotnet-aspnetcore/skills/dotnet-webapi/SKILL.md
Versions recorded
1
Latest version
git:20260608.2d163bb, committed Jun 8, 2026
Size
21,923 bytes
Repository stars
5,836
License
MIT

Guides creation and modification of ASP.NET Core Web API endpoints with correct HTTP semantics, OpenAPI metadata, and error handling. USE FOR: adding new API endpoints (controllers or minimal APIs), wiring up OpenAPI/Swagger, creating .http test files, setting up global error handling middleware. DO NOT USE FOR: general C# coding style, EF Core data access or query optimization (use optimizing-ef-core-queries), frontend/Blazor work, gRPC services, or SignalR hubs.

Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.

What the file says

# ASP.NET Core Web API

Produce well-structured ASP.NET Core Web API endpoints with proper HTTP
semantics, OpenAPI documentation, and error handling.

## When to Use

Use this skill when working on ASP.NET Core HTTP APIs, including:

- adding or modifying Web API endpoints implemented with controllers or minimal APIs;
- wiring up OpenAPI/Swagger metadata and endpoint documentation;
- defining request/response DTOs and consistent HTTP status code behavior;
- adding `.http` files or similar request-based API testing artifacts;
- configuring centralized API error handling middleware or exception mapping.

## When Not to Use

Do not use this skill for:

- general C# coding style or non-API refactoring;
- EF Core data modeling or query optimization work; use `optimizing-ef-core-queries`;
- frontend, Razor, or Blazor UI changes;
- gRPC services;
- SignalR hubs or real-time messaging flows.

## Inputs / prerequisites

Before applying this skill, gather the project context needed to match the
existing API style and wiring:

- the ASP.NET Core entry point, typically `Program.cs`;
- any existing controllers, especially classes inheriting `ControllerBase` or
  using `[ApiController]`;
…

Read the whole file at its exact version.

How to install

The exact contents, by fingerprint
mdr add dotnet/skills/dotnet-webapi@sha256:70e10d74aa367ee6

The line at the top of this page pins the label git:20260608.2d163bb, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.

Badge

mdr badge

[![mdr](https://markdownregistry.com/badge/art_73y62uowua46cfpc.svg)](https://markdownregistry.com/a/art_73y62uowua46cfpc)

3 badge image fetches in 30 days. What the badge shows.

Versions

The registry has recorded 1 version of this file, committed on Jun 8, 2026.

versioncommittedcommitsizeaudit
git:20260608.2d163bb latest2026-06-08 2d163bb 21,923 BA view

Audit of the latest version

A  17 of 17 checks passed. Fixed automatic checks with no AI involved, so the same checks give the same answer every run.
  • pass: Frontmatter block present
  • pass: Frontmatter declares a name
  • pass: Frontmatter declares a description
  • pass: Size between 200 bytes and 200 KB (21923 bytes)
  • pass: No zero-width or bidi control characters
  • pass: No instruction hidden inside an HTML comment
  • pass: No link to an exfiltration or paste host
  • pass: No credential-shaped string
  • pass: No instruction to send local credentials anywhere
  • pass: No text hidden with inline styles
  • pass: No prompt-injection phrasing
  • pass: No curl or wget piped into a shell
  • pass: No recursive delete of root, home or parent
  • pass: No instruction to read or print local credentials
  • pass: No base64 blob over 200 characters
  • pass: No link to a raw IP address
  • pass: No script tag

Source

GitHub

dotnet/skills · 5,836 stars · license MIT · pushed 2026-11-06 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_73y62uowua46cfpc
GET https://markdownregistry.com/api/v1/resolve?ref=dotnet/skills/dotnet-webapi
GET https://markdownregistry.com/api/v1/blob/70e10d74aa367ee63060b64edc397c5998c03da0fbdaf120f5aa8c94d373b77d

Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.

Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.

More from dotnet/skills

authoring-github-workflows SKILL.md skill
dotnet/skills · .agents/skills/authoring-github-workflows/SKILL.md · Author and review GitHub Actions workflow YAML safely so syntactically-valid YAML can't ship a workflow that GitHub…
git:20260616.01b4875 · audit A · 5,836 stars
create-custom-agent SKILL.md skill
dotnet/skills · .agents/skills/create-custom-agent/SKILL.md · Creates VS Code custom agent files (.agent.md) for specialized AI personas with tools, instructions, and handoffs. Use…
git:20260205.8bbd012 · audit A · 5,836 stars
create-skill-test SKILL.md skill
dotnet/skills · .agents/skills/create-skill-test/SKILL.md · Scaffolds eval.yaml evaluation specs for skills, custom agents, and redistributable gh-aw workflow packages in the…
git:20261008.0608d89 · audit A · 5,836 stars
create-skill SKILL.md skill
dotnet/skills · .agents/skills/create-skill/SKILL.md · Scaffolds new agent skills for the dotnet/skills repository. Use when creating a new skill, generating SKILL.md files…
git:20261009.e191d40 · audit A · 5,836 stars
improve-skill-quality SKILL.md skill
dotnet/skills · .agents/skills/improve-skill-quality/SKILL.md · Diagnoses and fixes skills in the dotnet/skills repository that lose to their own baseline, fail to activate, time out…
git:20261006.77aac26 · audit A · 5,836 stars
agentic-workflows SKILL.md skill
dotnet/skills · .github/skills/agentic-workflows/SKILL.md · Route gh-aw design, creation, diagnosis, patching, active debugging, and upgrade requests to the right strategies.
git:20261103.5aac3c0 · audit A · 5,836 stars
AGENTS.md AGENTS.md file
dotnet/skills · AGENTS.md
git:20261002.fd2077a · audit A · 5,836 stars
no-eval-skill SKILL.md skill
dotnet/skills · eng/skill-validator/tests/fixtures/no-eval-skill/SKILL.md · A skill with no eval.yaml for testing discovery behavior.
git:20260220.11bf689 · audit B · 5,836 stars
sample-skill SKILL.md skill
dotnet/skills · eng/skill-validator/tests/fixtures/sample-skill/SKILL.md · A sample skill for testing the validator. Helps with greeting generation.
git:20260220.11bf689 · audit A · 5,836 stars
csharp-scripts SKILL.md skill
dotnet/skills · plugins/dotnet-advanced/skills/csharp-scripts/SKILL.md · Run file-based C# apps with the .NET CLI when the user explicitly wants C#/.NET code without creating a project. Use…
git:20260629.4975793 · audit A · 5,836 stars
dotnet-pinvoke SKILL.md skill
dotnet/skills · plugins/dotnet-advanced/skills/dotnet-pinvoke/SKILL.md · Correctly call native (C/C++) libraries from .NET using P/Invoke and LibraryImport. Covers function signatures, string…
git:20261019.ec3ac07 · audit A · 5,836 stars
nuget-trusted-publishing SKILL.md skill
dotnet/skills · plugins/dotnet-advanced/skills/nuget-trusted-publishing/SKILL.md · Set up NuGet trusted publishing (OIDC) on a GitHub Actions repo — replaces long-lived API keys with short-lived tokens…
git:20260629.4975793 · audit A · 5,836 stars

Every file in dotnet/skills

Browse by kind, by grade A, or by owner.