mcp-builder SKILL.md skillA
This file is byte-identical to the first copy the registry indexed, one of 6 indexed copies. Same content hash, so the same checks give both the same grade.
mcp-builder from frankxai/agentic-creator-os is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add frankxai/agentic-creator-os/mcp-builder@git:20260124.0bc6f23Pins git:20260124.0bc6f23 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- frankxai/agentic-creator-os
- Path
.claude/skills/anthropic/mcp-builder/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260124.0bc6f23, committed Jan 24, 2026
- Size
- 13,552 bytes
- Repository stars
- 12
- License
- Apache-2.0
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 frankxai/agentic-creator-os/mcp-builder@sha256:b1010e90adcb8fd6The line at the top of this page pins the label git:20260124.0bc6f23, 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_7qhok5udrqay4zxh)
3 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Jan 24, 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 (13552 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
frankxai/agentic-creator-os · 12 stars · license Apache-2.0 · pushed 2026-10-19 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_7qhok5udrqay4zxh GET https://markdownregistry.com/api/v1/resolve?ref=frankxai/agentic-creator-os/mcp-builder GET https://markdownregistry.com/api/v1/blob/b1010e90adcb8fd6bf57640df34ab6454fbf7e4216e150a4620f7caccadc4e63
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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