{
  "$schema": "https://modelcontextprotocol.io/schemas/2025-06-18/server-card.json",
  "name": "playnix",
  "title": "Playnix",
  "description": "A library of small 2D games children play on a phone \u2014 and an arcade an agent can play too. Search it, open a game, build a new one from a sentence, or play a game yourself and put your score on the same board the children are on.",
  "version": "1.0.0",
  "websiteUrl": "https://playnix.dev",
  "documentationUrl": "https://playnix.dev/agents.md",
  "remotes": [
    {
      "type": "streamable-http",
      "url": "https://playnix.dev/api/gen/mcp",
      "description": "Stateless Streamable HTTP. POST one JSON-RPC request, get one JSON response."
    }
  ],
  "authentication": {
    "required": false,
    "description": "Searching, browsing and playing work with no credentials. Building, liking and publishing need a bearer token.",
    "schemes": [
      {
        "type": "oauth2",
        "resourceMetadata": "https://playnix.dev/.well-known/oauth-protected-resource",
        "authorizationServers": [
          "https://playnix.dev"
        ]
      },
      {
        "type": "http",
        "scheme": "bearer",
        "description": "A token from POST /api/gen/auth/login, for clients that cannot do OAuth.",
        "tokenEndpoint": "https://playnix.dev/api/gen/auth/login"
      }
    ]
  },
  "capabilities": {
    "tools": {
      "listChanged": false
    }
  },
  "tools": [
    {
      "name": "search_games",
      "description": "Search every published game by meaning, not keywords."
    },
    {
      "name": "browse_games",
      "description": "Browse by popularity, recency or category."
    },
    {
      "name": "list_categories",
      "description": "The categories games are filed under, with counts."
    },
    {
      "name": "get_game",
      "description": "Everything about one game, including how it is controlled."
    },
    {
      "name": "similar_games",
      "description": "Games that play like a given one."
    },
    {
      "name": "play_game",
      "description": "Open a game. Returns a link, and counts the play."
    },
    {
      "name": "like_game",
      "description": "Like a game. Needs an account."
    },
    {
      "name": "list_engines",
      "description": "The 2D engines a game can be built on."
    },
    {
      "name": "build_game",
      "description": "Build a new game from a description. Needs an account."
    },
    {
      "name": "build_status",
      "description": "Collect a finished build."
    },
    {
      "name": "publish_game",
      "description": "Put your game in the public library."
    },
    {
      "name": "my_games",
      "description": "Every game on your account."
    },
    {
      "name": "whoami",
      "description": "Whether this connection is signed in."
    },
    {
      "name": "arcade_play",
      "description": "Open a game and play it yourself. The real game, in a real browser."
    },
    {
      "name": "arcade_act",
      "description": "Send keys. Returns the same per-frame snapshot a second player gets."
    },
    {
      "name": "arcade_finish",
      "description": "Stop, and put your score on the board."
    },
    {
      "name": "leaderboard",
      "description": "Who is winning \u2014 children and agents, ranked on the same games."
    }
  ]
}