mcp-builder

by mcp-use

DEPRECATED: Build MCP servers with tools, resources, prompts, and interactive widgets using mcp-use. This skill is deprecated; use mcp-app-builder instead Supports defining tools, resources, prompts, and interactive React widgets within a single MCP server Includes response helpers for formatting outputs as text, markdown, HTML, images, objects, and custom widgets Provides server composition and proxying to aggregate multiple MCP servers into a unified interface

npx skills add https://github.com/mcp-use/mcp-use --skill mcp-builder
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Build MCP servers with mcp-use

mcp-use is the full stack TypeScript framework for building MCP servers and MCP apps to plug-ins and Claude connectors

Use it to build fully typed MCP servers with tools, resources, prompts, Agent Skills, 1 line oauth authentication adapters, middleware, production transports, a built-in Inspector, and headless tooling.

mcp-use has native first class support for MCP Apps with support for HMR both at the server and MCP App level to live preview the changes on clients like ChatGPT

Get started

Follow the guides at https://docs.mcp-use.com/v2.

API reference

Consult the TSDoc bundled in the installed package and the TypeScript source comments on disk. Inspect the project's installed mcp-use version and nearby code before choosing APIs or patterns.

Agent Skills

When a server needs reusable workflow instructions, prefer the conventional skills/<name>/SKILL.md layout. The directory enables Skills over MCP automatically, so omit skills from new MCPServer(...) in the normal case. Use skills: false only to ignore an existing directory, skills: true to require the convention, or skills: { directory: "server-skills" } for a project-relative override. Keep detailed references, scripts, templates, and assets beside SKILL.md; do not copy their contents into tool descriptions or server instructions.

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