STS2MCP: Slay the Spire 2 AI Agent Skill

Skill by ara.so — MCP Skills collection.

STS2MCP is a mod for Slay the Spire 2 that exposes game state and actions via a localhost REST API, with an optional MCP server for AI agent integration. It enables fully automated gameplay for singleplayer and multiplayer runs, including menu navigation, character selection, lobby control, and in-game decision making.

What It Does

• Game State Access: Read current game state (cards, relics, potions, enemies, map, etc.)
• Action Control: Play cards, use potions, make choices, navigate menus
• Profile Management: Switch profiles, access compendium data, search wiki entries
• Multiplayer Support: Host/join co-op games, control both singleplayer and multiplayer flows
• MCP Integration: Built-in MCP server for seamless Claude Desktop/Code integration

Installation

1. Install the Game Mod

Download the latest release from GitHub.