# Fantasysolvers Balatro Balatro Lab MCP server

Source: https://glimind.com/server/mcp-registry%2Fcom.fantasysolvers.balatro%2Fbalatro-lab
Registry id: `mcp-registry/com.fantasysolvers.balatro/balatro-lab`
Status: live (checked 2026-10-26T22:51:42.780Z)

## Measurements (30 days)

- Uptime: 99.78%
- Checks: 2759
- Outages (90 days): 1

## Install

```json
{
  "mcpServers": {
    "fantasysolvers-balatro-balatro-lab-mcp-s": {
      "type": "http",
      "url": "https://balatro.fantasysolvers.com/mcp"
    }
  }
}
```

Claude Code:

```sh
claude mcp add --transport http fantasysolvers-balatro-balatro-lab-mcp-s https://balatro.fantasysolvers.com/mcp
```

## Tools (4)

- `compare_actions`: Compare all immediate plays or exact small-deck play/discard values, with the same contract and validation as HTTP. Exact mode limits: 12 draw cards, two hands,
- `evaluate_hand`: Versioned optimized immediate score from bengine-core. Played and held order is optimized, not evaluated literally. Unsupported effects are rejected.
- `get_solver_capabilities`: Engine/rules/build identity, contract version, supported effects, assumptions and limits.
- `recommend_action`: Exact small-deck mathematical action values under optimal continuation in the supported model, not estimated real-game success. Returns all optimal ties and ful

Measured by Glimind (https://glimind.com): MCP handshake + tool list only, no tool is ever called. CC BY 4.0.