build-mcp-server SKILL.md skillB

build-mcp-server from velimirmueller/lab-claude-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.

mdr add velimirmueller/lab-claude-skills/build-mcp-server@git:20261009.d042141

Pins git:20261009.d042141 in mdr.lock. Pin the fingerprint instead.

Audit grade

B, 16 of 17 checks passed

Kind

SKILL.md skill

Repository

velimirmueller/lab-claude-skills

Path

skills/ai/build-mcp-server/SKILL.md

Versions recorded

2

Latest version

git:20261009.d042141, committed Oct 9, 2026

First version recorded

Oct 9, 2026

Size

6,207 bytes

Repository stars

5

License

MIT

Use when exposing a service or dataset to AI clients through the Model Context Protocol — few task-shaped tools with typed inputs, read-only by default, server-enforced confirmation for writes, stdio or Streamable HTTP, OAuth for remote, size limits, tests with the Inspector.

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

# Build an MCP Server

An MCP server is an API whose caller is a model: it reads your tool descriptions on every turn and recovers from errors by reading your messages. Design it for that reader. Spec revision **2026-07-28** (stateless, no sessions) and the **v2** TypeScript SDK (`@modelcontextprotocol/server`) are the targets; the older single-package `@modelcontextprotocol/sdk` 1.x is the previous line.

## 1. Audit current state

Read `.claude/stack-profile.md` (`languages`, `backend.track`, `ai`). If absent, detect per [stack-profile.md](../../core/_shared/stack-profile.md). Change nothing yet:

```bash
grep -n "modelcontextprotocol" package.json pyproject.toml 2>/dev/null           # which SDK and line
grep -rn "Mcp-Session-Id\|StreamableHTTPServerTransport\|SSEServerTransport\|initialize" src | head   # 2025-era code
ls .mcp.json mcp.json src/server.ts src/server.py 2>/dev/null
grep -rn "registerTool\|server.tool(\|@mcp.tool" src | wc -l                      # tool count
npm view @modelcontextprotocol/server version 2>/dev/null                          # current v2 line
```
…

Read the whole file at its exact version.

How to install

mdr add velimirmueller/lab-claude-skills/build-mcp-server@sha256:4199b4023af3a527

[![mdr](https://markdownregistry.com/badge/art_n6bee5cu3uvd7o7h.svg)](https://markdownregistry.com/a/art_n6bee5cu3uvd7o7h)

Versions

The registry has recorded 2 versions of this file, all committed on Oct 9, 2026.

Audit of the latest version

Source

API

GET https://markdownregistry.com/api/v1/artifacts/art_n6bee5cu3uvd7o7h
GET https://markdownregistry.com/api/v1/resolve?ref=velimirmueller/lab-claude-skills/build-mcp-server
GET https://markdownregistry.com/api/v1/blob/4199b4023af3a527abbee3d3e0f72ddbf5103eb2603ed7883427ae91d3ee5a52

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.

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