modelcontextprotocol

MCP Inspector Development Guide

Testing & QA community intermediate

SOURCE https://github.com/modelcontextprotocol/inspector

Description

> **Note:** Inspector V2 is under development to address architectural and UX improvements. During this time, V1 contributions should focus on **bug fixes and MCP spec compliance**. See [CONTRIBUTING.

Installation

This entry records only its repository, not the path inside it, so there is no exact command to give. Open the source below and copy the folder into ~/.claude/skills/, or the file into ~/.claude/agents/.

Repository README

This is the README for modelcontextprotocol/inspector, shared by 2 entries in this directory. It describes the repository, not this entry specifically.

MCP Inspector Development Guide

**Note:** Inspector V2 is under development to address architectural and UX improvements. During this time, V1 contributions should focus on **bug fixes and MCP spec compliance**. See [CONTRIBUTING.md](CONTRIBUTING.md) for more details.

Build Commands

Build all: npm run build
Build client: npm run build-client
Build server: npm run build-server
Development mode: npm run dev (use npm run dev:windows on Windows)
Format code: npm run prettier-fix
Client lint: cd client && npm run lint

Code Style Guidelines

Use TypeScript with proper type annotations
Follow React functional component patterns with hooks
Use ES modules (import/export) not CommonJS
Use Prettier for formatting (auto-formatted on commit)
Follow existing naming conventions:
- camelCase for variables and functions
- PascalCase for component names and types
- kebab-case for file names
Use async/await for asynchronous operations
Implement proper error handling with try/catch blocks
Use Tailwind CSS for styling in the client
Keep components small and focused on a single responsibility

Project Organization

The project is organized as a monorepo with workspaces:

client/: React frontend with Vite, TypeScript and Tailwind
server/: Express backend with TypeScript
cli/: Command-line interface for testing and invoking MCP server methods directly