Guide for creating high-quality MCP (Model Context Protocol) servers that enable LLMs to interact with external services through well-designed tools. Use when building MCP servers to integrate external APIs or services, whether in Python (FastMCP) or Node/TypeScript (MCP SDK).
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 Development Guide
> **UI library / Design System registries:** For MCP servers that search
> components, return examples, and produce CLI `add` commands, use
> `ui-library-mcp` instead of (or after) this general guide.
## Overview
Create MCP (Model Context Protocol) servers that enable language models to
interact with external services through well-designed tools. The quality of an
MCP server is measured by how well it helps agents finish real tasks — search,
create, update, and read — without drowning them in noise.
This skill includes companion guides under `reference/` and helper scripts under
`scripts/`. Load those files when you reach the matching phase.
---
# Process
## 🚀 High-Level Workflow
Creating a high-quality MCP server involves four main phases:
### Phase 1: Deep Research and Planning
#### 1.1 Understand Modern MCP Design
**API Coverage vs. Workflow Tools:**
…
The line at the top of this page pins the label git:20261011.ac45e0b, 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.
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 (9481 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
miladjoodi/skills · 23 stars · license MIT · pushed 2026-10-13 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_m2go64bxo5ih4orj
GET https://markdownregistry.com/api/v1/resolve?ref=miladjoodi/skills/mcp-builder
GET https://markdownregistry.com/api/v1/blob/42542112bafca55df42f19eb1280e038655e8c28c6bb02a2815a3aca16a7699e
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.
miladjoodi/skills · skills/agents-md-persian/SKILL.md · Project-level Persian and RTL rules for coding agents. Use when a project targets Persian-speaking users in Iran and…
miladjoodi/skills · skills/design-system-patterns/SKILL.md · Build scalable design systems with design tokens, theming infrastructure, and component architecture patterns. Use when…
miladjoodi/skills · skills/find-skills/SKILL.md · Helps users discover and install agent skills when they ask questions like "how do I do X", "find a skill for X", "is…
miladjoodi/skills · skills/frontend-design/SKILL.md · Guidance for distinctive, intentional visual design when building new UI or reshaping an existing one. Helps with…
miladjoodi/skills · skills/grill-me/SKILL.md · A relentless interview to sharpen a plan or design. Use when the user wants to stress-test their thinking, says "grill…
miladjoodi/skills · skills/improve-codebase-architecture/SKILL.md · Scan a codebase for deepening opportunities, present them as a visual HTML report, then grill through whichever one you…
miladjoodi/skills · skills/interaction-design/SKILL.md · Design and implement microinteractions, motion design, transitions, and user feedback patterns. Use when adding polish…
miladjoodi/skills · skills/iran-validation/SKILL.md · Validate and format Iranian identifiers correctly: national ID (کد ملی) checksum, legal entity ID (شناسه ملی), mobile…
anthropics/skills · skills/mcp-builder/SKILL.md · Guide for creating high-quality MCP (Model Context Protocol) servers that enable LLMs to interact with external…
thinkinaixyz/deepchat · resources/skills/mcp-builder/SKILL.md · Guide for creating high-quality MCP (Model Context Protocol) servers that enable LLMs to interact with external…
davepoon/buildwithclaude · plugins/all-skills/skills/mcp-builder/SKILL.md · Guide for creating high-quality MCP (Model Context Protocol) servers that enable LLMs to interact with external…
platonai/browser4 · browser4-agentic/src/main/resources/skills/mcp-builder/SKILL.md · Guide for creating advanced-quality MCP (Model Context Protocol) servers that enable LLMs to interact with external…
keyuchen21/agentic-engineering-handbook · tutorials/agent-loop/skills/mcp-builder/SKILL.md · Build MCP (Model Context Protocol) servers that give Claude new capabilities. Use when user wants to create an MCP…
kocoro-lab/kocoro · internal/skills/bundled/skills/mcp-builder/SKILL.md · Guide for creating high-quality MCP (Model Context Protocol) servers that enable LLMs to interact with external…
enuno/unifi-mcp-server · .agents/skills/mcp-builder/SKILL.md · Guide for creating high-quality MCP (Model Context Protocol) servers that enable LLMs to interact with external…
