mcp-builder SKILL.md skillA
mcp-builder from jjmartres/ai-coding-agents is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add jjmartres/ai-coding-agents/mcp-builder@git:20260428.dfccef3Pins git:20260428.dfccef3 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- jjmartres/ai-coding-agents
- Path
shared/.ai-agents/skills/mcp-builder/SKILL.md- Versions recorded
- 2
- Latest version
- git:20260428.dfccef3, committed Apr 28, 2026
- First version recorded
- Apr 20, 2026
- Size
- 13,544 bytes
- Repository stars
- 48
- License
- MIT
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 ## Overview To create high-quality MCP (Model Context Protocol) servers that enable LLMs to effectively interact with external services, use this skill. An MCP server provides tools that allow LLMs to access external services and APIs. The quality of an MCP server is measured by how well it enables LLMs to accomplish real-world tasks using the tools provided. --- # Process ## 🚀 High-Level Workflow Creating a high-quality MCP server involves four main phases: ### Phase 1: Deep Research and Planning #### 1.1 Understand Agent-Centric Design Principles Before diving into implementation, understand how to design tools for AI agents by reviewing these principles: **Build for Workflows, Not Just API Endpoints:** - Don't simply wrap existing API endpoints - build thoughtful, high-impact workflow tools - Consolidate related operations (e.g., `schedule_event` that both checks availability and creates event) - Focus on tools that enable complete tasks, not just individual API calls - Consider what workflows agents actually need to accomplish **Optimize for Limited Context:** - Agents have constrained context windows - make every token count …
Read the whole file at its exact version.
How to install
mdr add jjmartres/ai-coding-agents/mcp-builder@sha256:5495686d64c0b408The line at the top of this page pins the label git:20260428.dfccef3, 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_jzfbzp3rhwxd2hze)
4 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 2 versions of this file, between Apr 20, 2026 and Apr 28, 2026, about one every 8 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260428.dfccef3 latest | 2026-04-28 | dfccef3 | 13,544 B | A | view · diff |
| git:20260420.c9ed657 | 2026-04-20 | c9ed657 | 13,581 B | A | view |
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 (13544 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
jjmartres/ai-coding-agents · 48 stars · license MIT · pushed 2026-10-22 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_jzfbzp3rhwxd2hze GET https://markdownregistry.com/api/v1/resolve?ref=jjmartres/ai-coding-agents/mcp-builder GET https://markdownregistry.com/api/v1/blob/5495686d64c0b4081f4510a7dedc621a804679d13703ec436a4a82d12a0d7c7c
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 jjmartres/ai-coding-agents
Every file in jjmartres/ai-coding-agents