"Examples of MCPs (Microservices Communication Protocols) That Do Not Require API Keys" matching MCP servers:

An MCP server adapter that allows LLM agents to autonomously play World of ClaudeCraft by wrapping the game's headless environment as MCP tools for state reading and action execution.

Enables AI-assisted clan analysis for Clash of Clans by reading official API data and applying customizable rubrics for war grading, promotion screening, and carry-forward decisions.

Wraps the Manifold Markets public REST API into an MCP server, providing 40 tools for querying markets, users, groups, bets, comments, and more.

Classifies a user-selected image and returns a verdict of HOTDOG, NOT HOTDOG, or UNCERTAIN, using structured output that surfaces uncertainty and never mislabels an error as NOT HOTDOG. It is an entertainment-only tool and does not persist the images it processes.

MCP server for the Clash of Clans API. Can get player, clan information, analyze ongoing wars, as well as war logs (provided they are public).

An MCP server that wraps the ThreeHats Foundry VTT REST API relay so an LLM agent can author and manage Foundry VTT content, primarily creating D&D 5e creatures, through native MCP tools.

Control Unity Editor from AI agents. 200+ MCP tools for GameObjects, Scenes, Assets, Materials, Prefabs, Terrain, Physics, Lighting, and more. Works with Claude, Cursor, Windsurf, VS Code Copilot — any MCP client. Zero config: just npx and go.

Enables preparing Foundry worlds and running encounters through the FoundryVTT REST API Relay, with tools for managing worlds, scenes, encounters, and table play.

Enables AI assistants to interact with AccelByte Gaming Services APIs through semantic search, detailed API information retrieval, and authenticated API execution for game backend operations.

Provides real-time access to League of Legends esports data including live matches, schedules, leagues, event details, and VODs through a standardized interface.

Provides Steam concurrent player trends as JSON, offering monthly player time series, growth rates across 3M/6M/12M/5Y windows, and live most-played feeds via a single REST endpoint, without needing a Steam Web API key.

MCP server for the Cocofolia TRPG tool that enables character generation, NPC batch creation, session analysis, random events, and rule assistance via natural language.

Enables AI agents to control a shared Conway's Game of Life world via MCP tools, with a live browser viewer and WebSocket updates.

Enables Claude to interact with the RuneScape Wiki through search, page retrieval, extracts, and ASCII image rendering.

An MCP server that gives AI coding assistants access to the World of Warcraft addon API documentation, FrameXML/AddOn UI source code, and the Warcraft Wiki across all four client flavors.

MCP server exposing 30 tools for League of Legends player analysis, match review, and training-plan generation.

Enables AI assistants to control Discord servers with 93 tools for server management, moderation, voice TTS, AI chat via OpenRouter, and World of Warships stats lookup through the Model Context Protocol.

Enables MCP-compatible clients to read and write a gamified self-improvement RPG character sheet, including quest management, profile viewing, skills, social challenges, and leaderboards.

Enables AI-powered Path of Exile 2 character optimization through natural language queries, providing intelligent build recommendations, gear upgrades, and passive tree optimization using the official PoE API and comprehensive game database.

Enables users to search, compare, and retrieve detailed information about World of Warships ships using the official Wargaming.net API. Supports filtering by nation, type, and tier with multi-language support and intelligent caching.