STS2 FAQs

Question 1

What kind of AI agents can integrate with STS2?

Accepted Answer

Any AI agent compliant with the Model Context Protocol (MCP) can integrate with STS2. The `mcp-server` component translates bridge HTTP endpoints into standard MCP tools, making it compatible with agents like Claude Desktop or Antigravity for controlling Slay the Spire 2.

Question 2

What is STS2 and what is its primary purpose?

Accepted Answer

STS2 (specifically `sts2-mcp`) is a high-performance local control stack designed for Slay the Spire 2. Its main purpose is to bridge the game's internal state with external AI agents, enabling automated gameplay and sophisticated AI development using the Model Context Protocol (MCP).

Question 3

How does STS2 ensure accurate game data and low latency?

Accepted Answer

Unlike traditional methods, STS2 utilizes a native C# bridge mod that injects directly into the Slay the Spire 2 process. This provides 100% accurate game data and sub-millisecond latency for both state extraction and action execution, bypassing less reliable screen-scraping or OCR solutions.

Question 4

What specific game actions can be automated or controlled using STS2?

Accepted Answer

STS2 provides a comprehensive set of tools for automated gameplay, including fetching full game state, listing legal actions, playing card sequences, executing complex combat sequences, resolving room rewards, managing rest sites, handling card selections, traveling on the map, and resolving shop visits – all via batched and optimized calls.

Question 5

Is STS2 an official tool for Slay the Spire 2?

Accepted Answer

No, STS2 is an unofficial, community-driven project. It is not affiliated with, endorsed by, or associated with Mega Crit or the developers of Slay the Spire 2. Users should proceed with this understanding.

STS2

STS2

Key Features

Use Cases

Key Features

Use Cases