skill-mcp-builder

skill-mcp-builder is a skill for Claude Code, Codex from IAPro-Community/Orquestrador-Maestro. It costs 31 tokens per session (204 once invoked), scanned A, original, Apache-2.0.

A workflow for designing and implementing MCP servers, which let coding agents connect to tools and services through defined inputs and outputs. It focuses on safe behavior, clear schemas, minimal authentication, error handling, tests, and operating documentation.

In plain words
What is it for?
Use it to plan MCP tools, define their input and output schemas, add authentication, handle errors, write tests, and document how the server is operated.
Why use it?
It helps avoid unclear tool interfaces and unsafe access when building an MCP server. It also makes failures easier to handle and the server easier to test and run.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use it to plan MCP tools, define their input and output schemas, add authentication, handle errors, write tests, and document how the server is operated.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/iapro-community/orquestrador-maestro/skill-mcp-builder
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.

Any agent
npx skills add IAPro-Community/Orquestrador-Maestro --skill skill-mcp-builder
Clone the repo
git clone --depth 1 https://github.com/IAPro-Community/Orquestrador-Maestro

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 skill-mcp-builder

README.md
[![agentmods](https://agentmods.dev/badge/skills/iapro-community/orquestrador-maestro/skill-mcp-builder/github.svg)](https://agentmods.dev/skills/iapro-community/orquestrador-maestro/skill-mcp-builder)
Your own site
<a href="https://agentmods.dev/skills/iapro-community/orquestrador-maestro/skill-mcp-builder"><img src="https://agentmods.dev/badge/skills/iapro-community/orquestrador-maestro/skill-mcp-builder/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for skill-mcp-builder

Your own site · 80×15
<a href="https://agentmods.dev/skills/iapro-community/orquestrador-maestro/skill-mcp-builder"><img src="https://agentmods.dev/badge/skills/iapro-community/orquestrador-maestro/skill-mcp-builder.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 31 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 204 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
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 5.1 $0.00031 $0.00204
Opus 5 $0.00015 $0.00102
Sonnet 5 $0.00006 $0.00041
Haiku 4.5 $0.00003 $0.00020

Measured 11d ago against content hash 8af50b33c9f5, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

skill-mcp-builder 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 11d 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.

codex/skills/skill-mcp-builder/SKILL.md · 24 lines

What it actually says

MCP Builder

Design tools around narrow, typed capabilities rather than exposing a raw shell or broad database.

Checklist

  • Define resources, tools, inputs, outputs, errors, pagination, and idempotency.
  • Use least-privilege authentication and never log secrets.
  • Validate every input and bound time, size, retries, and result volume.
  • Separate read and write operations; require confirmation for consequential writes.
  • Add unit tests, protocol/integration tests, timeout tests, and malformed-input tests.
  • Document setup, environment variables, permissions, failure modes, and revocation.
  • Run a quality-gate review before publishing or connecting the server.

Prefer official APIs and stable SDKs. Do not generate a tool that silently executes arbitrary commands.

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. 11d ago First seen · 24 lines · 31 tokens per session scan A 8af50b33c9f5

Subscribe to this mod's changes

skill-mcp-builder is a skill published in the GitHub repository IAPro-Community/Orquestrador-Maestro (42 stars, last pushed today), licensed Apache-2.0. It adds 31 tokens to every session and 204 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 2026-08-30.

Related

Other skills, from other repositories

agent-self-scheduling

Schedule AI agent runs with cron, loops, or external clocks while avoiding unsafe tight autonomous timers.

sickn33/agentic-awesome-skills · 24 tokens

dry-run

Preview command effects without making changes. Simulates file writes, git operations, agent spawns, and state changes. All reads execute normally for accurate preview. Use --dry-run flag on any command.

marcusgoll/Spec-Flow · 43 tokens

finalize-phase

Completes feature/epic workflows after deployment with comprehensive walkthrough generation for epics (v5.0+), roadmap updates, artifact archival, documentation, and branch cleanup. Use after /ship-prod, /deploy-prod, or /build-local completes, or when user asks to finalize. (project).

marcusgoll/Spec-Flow · 65 tokens

task-breakdown-phase

Standard Operating Procedure for /tasks phase. Covers task sizing, acceptance criteria definition, and TDD-first task sequencing. (project).

marcusgoll/Spec-Flow · 31 tokens

staging-deployment-phase

Deploys features to staging environment with database migrations, health checks, and deployment verification. Use during /ship-staging phase or when deploying to staging environments for validation before production release.

marcusgoll/Spec-Flow · 42 tokens

dependency-conflict-resolver

Detect and resolve package dependency conflicts before installation across npm/yarn/pnpm, pip/poetry, cargo, and composer. Auto-trigger when installing/upgrading packages. Validates peer dependencies, version compatibility, security vulnerabilities. Auto-resolves safe conflicts (patches, dev deps), suggests manual…

marcusgoll/Spec-Flow · 80 tokens