mcp-builder

Guidance for creating MCP servers that let language models interact with external services through defined tools. It covers implementations in Python with FastMCP and in Node or TypeScript with the MCP SDK.

In plain words
What is it for?
Use it when building an MCP integration, including defining tools and connecting services through Python, Node, or TypeScript.
Why use it?
It helps developers design the connection between an AI model and an external API or service in a consistent way.

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/mjunaidca/taskforce/mcp-builder
Any agent
npx skills add mjunaidca/taskforce --skill mcp-builder
Clone the repo
git clone --depth 1 https://github.com/mjunaidca/taskforce

Made for: Claude Code, Codex.

Per session 61 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,501 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. Scan, not verified.
Origin unknown 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 $0.00061 $0.02501
Opus 5 $0.00030 $0.01251
Sonnet 5 $0.00012 $0.00500
Haiku 4.5 $0.00006 $0.00250

Measured 2d ago against content hash 5d54e2c1f1f2, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

mcp-builder scanned grade A with 1 finding 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 2d ago.

The scan reads SKILL.md. This mod also ships 2 executable files (scripts/connections.py, scripts/evaluation.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.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

test: ["CMD", "python", "-c", "import urllib.request; urllib.request.urlopen('http://127.0.0.1:8001/health').read()"]
.claude/skills/mcp-builder/SKILL.md · 314 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

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. 2d ago First seen · 314 lines · 61 tokens per session scan A 5d54e2c1f1f2

Subscribe to this mod's changes

mcp-builder is a skill published in the GitHub repository mjunaidca/taskforce (10 stars, last pushed 7mo ago), with no licence file. It adds 61 tokens to every session and 2,501 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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