{"library":"mcp-hello-world","type":"library","category":null,"description":"mcp-hello-world is a minimalist Model Context Protocol (MCP) server simulation, primarily designed as a test double or mock server for client-side unit and integration testing. Implemented in TypeScript, it offers a lightweight, predictable, and isolated environment for verifying MCP client logic without relying on real, complex, or potentially slow AI backend services. It currently stands at version 1.1.2 (released April 2025) with a recent cadence of small patches. Key differentiators include its support for both STDIO and HTTP/SSE MCP transport protocols, enabling comprehensive client testing across different connection methods. It provides simple `echo` and `debug` tools for predictable behavior, ensuring fast and reliable test execution. This package is explicitly *not* intended for production deployments or as a general-purpose MCP server.","language":"javascript","status":"active","version":"1.1.2","tags":["javascript","lobehub","model-context-protocol","sdk","typescript"],"install":[{"cmd":"npm install mcp-hello-world","imports":["import * as MCPHelloWorld from 'mcp-hello-world'","import { spawn } from 'child_process'","import type { ChildProcess } from 'child_process'"]},{"cmd":"yarn add mcp-hello-world","imports":[]},{"cmd":"pnpm add mcp-hello-world","imports":[]}],"homepage":"https://www.npmjs.com/package/mcp-hello-world","github":"https://github.com/lobehub/mcp-hello-world","docs":null,"changelog":null,"pypi":null,"npm":"https://www.npmjs.com/package/mcp-hello-world","openapi_spec":null,"status_page":null,"smithery":null,"compatibility":{"summary":{"python_range":"18–22","success_rate":0,"avg_install_s":null,"avg_import_s":null,"wheel_type":null},"url":"https://checklist.day/v1/registry/mcp-hello-world/compatibility"},"provenance":{"verified_status":null,"verified_at":null,"last_verified":"Wed Jun 17","next_check":"Sat Jul 18","install_tag":null}}