mcp-builder SKILL.md skillA
mcp-builder from keyuchen21/agentic-engineering-handbook is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add keyuchen21/agentic-engineering-handbook/mcp-builder@git:20260613.5c7b9b8Pins git:20260613.5c7b9b8 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- keyuchen21/agentic-engineering-handbook
- Path
tutorials/agent-loop/skills/mcp-builder/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260613.5c7b9b8, committed Jun 13, 2026
- Size
- 4,918 bytes
- Repository stars
- 558
- License
- MIT
Build MCP (Model Context Protocol) servers that give Claude new capabilities. Use when user wants to create an MCP server, add tools to Claude, or integrate external services.
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
# MCP Server Building Skill
You now have expertise in building MCP (Model Context Protocol) servers. MCP enables Claude to interact with external services through a standardized protocol.
## What is MCP?
MCP servers expose:
- **Tools**: Functions Claude can call (like API endpoints)
- **Resources**: Data Claude can read (like files or database records)
- **Prompts**: Pre-built prompt templates
## Quick Start: Python MCP Server
### 1. Project Setup
```bash
# Create project
mkdir my-mcp-server && cd my-mcp-server
python3 -m venv venv && source venv/bin/activate
# Install MCP SDK
pip install mcp
```
### 2. Basic Server Template
```python
#!/usr/bin/env python3
"""my_server.py - A simple MCP server"""
from mcp.server import Server
from mcp.server.stdio import stdio_server
from mcp.types import Tool, TextContent
# Create server instance
server = Server("my-server")
# Define a tool
@server.tool()
async def hello(name: str) -> str:
"""Say hello to someone.
Args:
name: The name to greet
"""
return f"Hello, {name}!"
@server.tool()
async def add_numbers(a: int, b: int) -> str:
"""Add two numbers together.
Args:
a: First number
…Read the whole file at its exact version.
How to install
mdr add keyuchen21/agentic-engineering-handbook/mcp-builder@sha256:1f0d78f420282374The line at the top of this page pins the label git:20260613.5c7b9b8, 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.
[](https://markdownregistry.com/a/art_532usohngrxrykbl)
4 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Jun 13, 2026.
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (4918 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
keyuchen21/agentic-engineering-handbook · 558 stars · license MIT · pushed 2026-10-20 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_532usohngrxrykbl GET https://markdownregistry.com/api/v1/resolve?ref=keyuchen21/agentic-engineering-handbook/mcp-builder GET https://markdownregistry.com/api/v1/blob/1f0d78f420282374f87b9c6f0dfaad97397d840c7e47f4c878f01d00ab905b9a
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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