STS2MCP

STS2MCP is an experimental research mod for Slay the Spire 2 that enables AI agents to play the game. It exposes game state and actions via a localhost REST API, with an optional MCP server for Claude Desktop/Claude Code integration. It supports both singleplayer and multiplayer co-op, and has been tested against STS2 v0.99.1.

STS2MCP sits in the Dev Tooling category, so it is usually better judged by workflow fit, deployment style, and team needs than by isolated features alone. Based on the available metadata, it leans most clearly toward Exposes game state and actions via a localhost REST API. A representative use case is AI agents autonomously playing Slay the Spire 2. The listed license is MIT. GitHub stars are currently 526. Relevant tags include agentic-ai, mcp-server.