mcp-development

mcp-development is a skill for Claude Code, Codex from fabriciofs/mcp-postgres. It costs 43 tokens per session (623 once invoked), scanned A, original, MIT.

A toolkit for building MCP servers, which let AI assistants use tools and access data through a standard connection.

In plain words
What is it for?
Use it to start an MCP server project, add tools, investigate connection problems, review server code, and write its documentation.
Why use it?
It brings project setup, tool creation, debugging, testing, code review, and documentation guidance into one place.

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/fabriciofs/mcp-postgres/mcp-development
Any agent
npx skills add fabriciofs/mcp-postgres --skill mcp-development
Clone the repo
git clone --depth 1 https://github.com/fabriciofs/mcp-postgres

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-development

README.md
[![agentmods](https://agentmods.dev/badge/skills/fabriciofs/mcp-postgres/mcp-development.svg)](https://agentmods.dev/skills/fabriciofs/mcp-postgres/mcp-development)
Your own site
<a href="https://agentmods.dev/skills/fabriciofs/mcp-postgres/mcp-development"><img src="https://agentmods.dev/badge/skills/fabriciofs/mcp-postgres/mcp-development.svg" alt="Measured on agentmods" height="20"></a>
Per session 43 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 623 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 $0.00043 $0.00623
Opus 5 $0.00022 $0.00311
Sonnet 5 $0.00009 $0.00125
Haiku 4.5 $0.00004 $0.00062

Measured 3d ago against content hash 1b9c71ddbbee, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

mcp-development 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 3d ago.

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.

Origin

Copies of this mod

1 near-identical copy found in the catalogue:

.claude/skills/mcp-development/SKILL.md · 101 lines

What it actually says

MCP Development Toolkit

Complete toolkit for MCP server development including project setup, tool creation, debugging, and code review.

Project Setup

Directory Structure

mcp-project/
├── src/
│   ├── index.ts          # Server entry point
│   ├── tools/            # Tool definitions
│   │   └── index.ts
│   ├── db/               # Database connections
│   │   └── connection.ts
│   └── utils/
│       └── index.ts
├── build/                # Compiled output
├── .env.example
├── package.json
├── tsconfig.json
└── README.md

package.json

{
  "name": "mcp-server",
  "version": "1.0.0",
  "type": "module",
  "main": "build/index.js",
  "scripts": {
    "build": "tsc",
    "start": "node build/index.js",
    "dev": "tsc --watch",
    "inspector": "npx @modelcontextprotocol/inspector"
  },
  "dependencies": {
    "@modelcontextprotocol/sdk": "^1.0.0",
    "zod": "^3.23.0"
  },
  "devDependencies": {
    "@types/node": "^20.0.0",
    "typescript": "^5.0.0"
  }
}

tsconfig.json

{
  "compilerOptions": {
    "target": "ES2022",
    "module": "NodeNext",
    "moduleResolution": "NodeNext",
    "strict": true,
    "esModuleInterop": true,
    "skipLibCheck": true,
    "outDir": "build",
    "rootDir": "src",
    "declaration": true,
    "sourceMap": true
  },
  "include": ["src/**/*"],
  "exclude": ["node_modules", "build"]
}

For detailed setup guide, see SETUP.md.

Creating Tools

For tool creation templates and patterns, see TOOLS.md.

Debugging

For common issues and debugging techniques, see DEBUG.md.

Code Review

For review checklists, see REVIEW.md.

Quick Commands

# Initialize project
npm init -y && npm install @modelcontextprotocol/sdk zod
npm install -D typescript @types/node && npx tsc --init

# Build and run
npm run build && node build/index.js

# Test with inspector
npx @modelcontextprotocol/inspector
Files

What ships with it

4 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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. 3d ago First seen · 101 lines · 43 tokens per session scan A 1b9c71ddbbee

Subscribe to this mod's changes

mcp-development is a skill published in the GitHub repository fabriciofs/mcp-postgres (1 stars, last pushed 7mo ago), licensed MIT. It adds 43 tokens to every session and 623 once invoked, about $0.0002 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 2026-08-31.

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