Fantasy Solvers – Balatro Lab MCP Server

by fantasysolvers-balatro Your server? Claim it

answering

Fantasy Solvers – Balatro Lab is answering right now. Last checked 12 min ago. It exposes 4 tools.

Supported Balatro scoring and exact small-deck play/discard analysis with verified explanations.

Uptime history 25 days of history · worst day 92%

25 days agonow

100.0%

Uptime 24h

91 of 91 checks

Tools

read from the server

651 ms

Response time

average over 24h

open, no key

Access

streamable-http

Nothing serious here today

Today is the operative word: we check Fantasy Solvers – Balatro Lab every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 12 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

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

Settings → Connectors → Add custom connector, then paste this address

https://balatro.fantasysolvers.com/mcp

~/.codex/config.toml

[mcp_servers.balatro-lab]
url = "https://balatro.fantasysolvers.com/mcp"

.cursor/mcp.json

{
  "mcpServers": {
    "balatro-lab": {
      "url": "https://balatro.fantasysolvers.com/mcp"
    }
  }
}

.vscode/mcp.json

{
  "servers": {
    "balatro-lab": {
      "type": "http",
      "url": "https://balatro.fantasysolvers.com/mcp"
    }
  }
}

Available tools 4

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

compare

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, two discards. Select explain_actions for particular branches.

evaluate

evaluate_hand

Versioned optimized immediate score from bengine-core. Played and held order is optimized, not evaluated literally. Unsupported effects are rejected.

recommend

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 fully reconciled draw explanations; no recommendation on incomplete jobs. No A2/full-deck sampling.

solver

get_solver_capabilities

Engine/rules/build identity, contract version, supported effects, assumptions and limits.

Endpoints

URL	Transport	State	Latency	Checked
https://balatro.fantasysolvers.com/mcp	streamable-http	answering	407 ms	12 min ago

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Fantasy Solvers – Balatro Lab — questions

Answers built from our own checks of this server.

What can Fantasy Solvers – Balatro Lab do?

It exposes 4 tools, read directly from the server on our last check. Among them: compare_actions, evaluate_hand, get_solver_capabilities, recommend_action. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →

Is Fantasy Solvers – Balatro Lab working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 91 of 91 checks got a reply (100.0%), average response time 651 ms. The bar chart above shows every period we have measured.

How do I connect Fantasy Solvers – Balatro Lab?

Copy the ready config from this page. We generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each in the form that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.

Does Fantasy Solvers – Balatro Lab need an API key?

No. Fantasy Solvers – Balatro Lab completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 4 of them are readable on this page. This is what we observed, not what the docs claim.

How fast is Fantasy Solvers – Balatro Lab?

It answers our handshake in 651 ms on average, which is faster than 15% of all working MCP servers we measure. That is on the slow side — worth knowing if the tool sits inside an interactive loop. The comparison comes from our own checks across the whole registry, every 15 minutes.