STS2MCP
Active·★ 377·MIT·Updated 2026-05-13
★ Hidden Gem★ Dev Tooling
Full agentic runs for Slay the Spire 2. A mod that exposes in-game state, and the MCP server for the mod.
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.
#agentic-ai#mcp-server#mcp-servers#research-and-development#slay-the-spire-2
01
Features
01Exposes game state and actions via a localhost REST API
02Optional MCP server for Claude Desktop / Claude Code integration
03Supports singleplayer and multiplayer (co-op)
04Automatically starts HTTP server on localhost:15526
05Allows AI agents to fully automate game runs
02
Compatibility
Windows
Windows
Verified via docs
03
Use cases
↳AI agents autonomously playing Slay the Spire 2
↳Collaborative human-AI co-op runs
↳Benchmarking AI reasoning and decision-making capabilities
04
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Comments
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- AAlex JacksonMay 21, 2026
Interesting platform for studying game-playing agents in a complex environment.
- RRemy LeeMar 30, 2026
Good for researchers studying decision-making under uncertainty.
- KKendall LewisMar 23, 2026
Full agentic runs for Slay the Spire 2 — game state exposed via MCP.
- SScout KimMar 11, 2026
The mod integration is solid, game state is accurately represented.