
Mcp Builder
Guide an agent through designing and implementing a Model Context Protocol server so Claude Code, Cursor, or Codex can call your tools reliably.
Overview
MCP-builder is an agent skill for the Build phase that helps you design and implement Model Context Protocol servers so coding agents can call your tools and resources.
Install
npx skills add https://github.com/composiohq/awesome-claude-skills --skill mcp-builderWhat is this skill?
- Structured workflow for scoping tools, resources, and prompts on an MCP server
- Covers implementation patterns agents need for composable external integrations
- Oriented toward shipping a working server package agents can register in clients
- Fits the awesome-claude-skills catalog pattern for Claude-ecosystem builders
- Apache-2.0 licensed package in the Composio awesome collection
Adoption & trust: 2.4k installs on skills.sh; 63.7k GitHub stars; 1/3 security scanners passed (skills.sh audits); trending (+100% hot-view momentum).
What problem does it solve?
You need agents to use your internal APIs or SaaS actions, but ad-hoc prompts cannot replace a registered MCP tool surface.
Who is it for?
Indie developers shipping agent-first products who need first-party MCP integrations without reading the entire spec cold.
Skip if: Teams that only need a pre-built Composio connector with no custom server, or workflows that are pure in-repo skills with no external tool protocol.
When should I use this skill?
When starting or extending a custom MCP server for agent clients.
What do I get? / Deliverables
You leave with a structured MCP server implementation plan and code-oriented guidance ready to register in Claude Desktop, Claude Code, or Cursor MCP settings.
- MCP server project structure
- Tool and resource handler implementations
- Client registration notes
Recommended Skills
Journey fit
MCP servers are built while you are wiring agent capabilities into the product, not during idea research or post-launch SEO. Agent-tooling is the canonical shelf because the output is MCP tooling surface area for LLM clients.
How it compares
Skill package for authoring MCP servers—not a hosted MCP marketplace entry and not a one-shot REST wrapper script.
Common Questions / FAQ
Who is mcp-builder for?
Solo and indie builders adding custom tools to Claude Code, Cursor, or other MCP-capable clients who want guided server structure instead of spec-only reading.
When should I use mcp-builder?
During Build/agent-tooling when you are implementing new MCP tools, resources, or prompts for an agent product or internal automation.
Is mcp-builder safe to install?
Check the Security Audits panel on this Prism page; building MCP often implies network and filesystem access in your project—scope credentials and tool permissions deliberately.
SKILL.md
READMESKILL.md - Mcp Builder
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