mcp-builder

mcp-builder: Was dieser Skill macht

mcp-builder is a reusable agent skill listed on skills.sh under anthropics/skills. skills.sh rank #192, installs 56.0K, GitHub stars 140.2K, first seen Jan 19, 2026.

Comprehensive guide for building high-quality MCP servers that connect LLMs to external services. Four-phase workflow covering research, implementation, testing, and evaluation with language-specific guidance for TypeScript (recommended) and Python Emphasizes API coverage over workflow tools, clear tool naming with consistent prefixes, and actionable error messages for agent guidance Includes best practices for input/output schemas, pagination, response formatting, and tool annotations (readOnly, destructive, idempotent, openWorld hints) Provides reference documentation links for MCP protocol specification, SDK documentation, and language-specific implementation patterns with code examples Evaluation framework requiring 10 independent, read-only, complex questions with verifiable answers in XML format to validate LLM effectiveness with your server

Wann er sinnvoll ist

• Use this skill when the task matches the package name, repository context, or skills.sh topic: design.
• Prefer it when a repeatable workflow is better than a one-off prompt: setup, review, design, deployment, automation, research, media generation, or operational checks.
• For production work, read the linked repository and install command before allowing the agent to run scripts or modify files.

Wie ein Agent ihn nutzt

1. Confirm the user intent and whether this skill is the right fit.
2. Install or inspect the skill with the official command from skills.sh.
3. Read the local SKILL.md and only load extra files referenced by that skill.
4. Follow the skill's workflow, then verify the result with tests, screenshots, audits, or source-backed checks as appropriate.
5. Record any constraints, missing credentials, tool permissions, or security warnings before handoff.

Qualitats- und Sicherheitschecks

• Check repository ownership and source reputation: anthropics/skills.
• Review security audit signals before installing; skills.sh reports: Gen Agent Trust Hub Pass Socket Pass Snyk Warn.
• Never grant broad shell, browser, cloud, or deployment permissions without user approval.
• Treat generated output as draft until validated by the skill's own acceptance criteria.
• If the skill touches cloud resources, costs, credentials, customer data, or production deploys, require a human review step.

Quellen und Installation

• skills.sh page: https://www.skills.sh/anthropics/skills/mcp-builder
• Repository: https://github.com/anthropics/skills
• Install command: npx skills add https://github.com/anthropics/skills --skill mcp-builder

FAQ

Is mcp-builder an agent, a prompt, or a skill?
It is a skill: a reusable package of task-specific instructions and supporting files that an agent can load when the user's request matches the workflow.

Should I install it automatically?
Only after checking the repository, install command, audit status, and whether the user wants this capability in the current agent environment.

What makes it useful for AIDreamHub users?
It helps users discover practical agent capabilities from the open skills ecosystem and compare them by task, source, install count, and operational risk.