mcp-scaffold

mcp-scaffold is a skill for Claude Code, Codex from timothywarner-org/claude-code. It costs 65 tokens per session (897 once invoked), scanned A, original, MIT.

A project generator and validator for Python servers built with FastMCP. MCP is a standard way for an AI assistant to access tools, data, and prompts from a server.

In plain words
What is it for?
Use it to create a new MCP server with tools, resources, prompts, or startup handling, and to validate an existing server file.
Why use it?
It removes the repetitive setup work and checks whether an existing server follows expected type, resource, validation, and asynchronous-code patterns.

Skill for Claude CodeCodex

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add skills/timothywarner-org/claude-code/mcp-scaffold
Any agent
npx skills add timothywarner-org/claude-code --skill mcp-scaffold
Clone the repo
git clone --depth 1 https://github.com/timothywarner-org/claude-code

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for mcp-scaffold

README.md
[![agentmods](https://agentmods.dev/badge/skills/timothywarner-org/claude-code/mcp-scaffold.svg)](https://agentmods.dev/skills/timothywarner-org/claude-code/mcp-scaffold)
Your own site
<a href="https://agentmods.dev/skills/timothywarner-org/claude-code/mcp-scaffold"><img src="https://agentmods.dev/badge/skills/timothywarner-org/claude-code/mcp-scaffold.svg" alt="Measured on agentmods" height="20"></a>
Per session 65 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 897 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5 $0.00065 $0.00897
Opus 5 $0.00032 $0.00449
Sonnet 5 $0.00013 $0.00179
Haiku 4.5 $0.00006 $0.00090

Measured 5d ago against content hash 545d6e4f1a06, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

mcp-scaffold scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 5d ago.

The scan reads SKILL.md. This mod also ships 5 executable files (assets/templates/basic-server.py, assets/templates/full-server.py, scripts/init_project.py, …), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

.claude/skills/mcp-scaffold/SKILL.md · 153 lines

How it starts

The opening of the file, as written. The whole thing — 153 lines — stays where its author put it; the contents beside it link to each section on GitHub.

MCP Server Scaffolding

Scaffold production-ready Python MCP servers with FastMCP.

Quick Start

Generate a new MCP server:

python scripts/scaffold.py my-server --output ./my-server

This creates a complete project structure with:

  • server.py - Main server with example tool, resource, and prompt
  • requirements.txt - Dependencies (fastmcp, pydantic)
  • README.md - Usage instructions

Scaffolding Options

Minimal Server (Tools Only)

python scripts/scaffold.py my-server --template basic

Full Server (All Primitives)

python scripts/scaffold.py my-server --template full

With Specific Features

python scripts/scaffold.py my-server \
  --tools \
  --resources \
  --prompts \
  --lifespan \
  --output ./servers/my-server

Validation

Validate an existing MCP server:

python scripts/validate.py path/to/server.py

Checks:

  • FastMCP import and initialization
  • Tool definitions with proper type hints
  • Resource URI patterns
  • Pydantic Field usage
  • Async function patterns

Project Structure

Generated projects follow this structure:

my-server/
├── server.py           # Main MCP server
├── requirements.txt    # Python dependencies
├── README.md          # Usage documentation
└── data/              # Default data directory (gitignored)

Templates

Basic Template

Minimal server with one tool:

from fastmcp import FastMCP

mcp = FastMCP("my-server")

@mcp.tool
def hello(name: str) -> str:
    """Greet someone by name."""
    return f"Hello, {name}!"

if __name__ == "__main__":
    mcp.run()

Full Template

Complete server with tools, resources, prompts, and lifespan. See assets/templates/full-server.py.

Reference Documentation

Read the full file on GitHub · 153 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 5d ago First seen · 153 lines · 65 tokens per session scan A 545d6e4f1a06

Subscribe to this mod's changes

mcp-scaffold is a skill published in the GitHub repository timothywarner-org/claude-code (223 stars, last pushed 1mo ago), licensed MIT. It adds 65 tokens to every session and 897 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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