Fantasy Solvers – Balatro Lab

com.fantasysolvers.balatroPublished by balatro.fantasysolvers.comOfficial publisherv0.1.0Updated Oct 28, 2026

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

VerifiedStreamable HTTPWeb executableData & AnalyticsAI & ML

Overview

AI-generated overview

Remote MCP server that scores Balatro hands and computes exact small-deck play/discard values with explanations.

What you can do
  • Score a hand with the versioned optimized engine, including optimized played and held ordering
  • Recommend the best action with exact small-deck values, all optimal ties and reconciled draw explanations
  • Compare all immediate plays or exact small-deck play/discard values, with branch explanations on request
  • Report engine, rules and build identity, supported effects, assumptions and limits
When to use it
Useful when you want an assistant to reason about Balatro scoring, compare candidate plays or discards, or check what a solver model supports before trusting its numbers. Best for small-deck, limited-hand analysis rather than full-game simulation.
Requirements
A remote streamable HTTP endpoint; no package, environment variables or headers are declared. No authentication is declared.
Before you install
Results are model-based: unsupported effects are rejected, exact mode is limited to 12 draw cards, two hands and two discards, and values are not estimates of real-game success. No recommendation is returned for incomplete jobs.

Installation

In SourceWeft

  1. Open Fantasy Solvers – Balatro Lab in the dashboard and add it to a workspace.
  2. Enable the server for the chats that should use its tools.

Web executable via Streamable HTTP. Remote servers run from the web runtime once configured in a workspace.

Use with an agent

Paste this prompt into Claude Code, Codex, Cursor or another agent — or into SourceWeft chat. The agent reads this server's install guide, shows you its publisher, endpoint and sign-in, and adds it to your client once you agree. Keys never go into a command.

Read https://sourceweft.com/mcp/com.fantasysolvers.balatro%2Fbalatro-lab/install.md and connect the MCP server it describes to my client. Before changing any config, show me its publisher, endpoint and sign-in method and wait for my OK. Never put an API key in a command or in a file I would commit; ask me where it should come from.

Read the install guide the agent follows

Other MCP clients

Add this to your client's mcpServers config.

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

Tools

4

evaluate_hand

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

Parametersheldjokerslevelsplayedrequireddiscardsrequest_idcontract_versionrequired

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.

Parametersstaterequiredrequest_idanalysis_modeexplain_actionscontract_versionrequiredbudget_score_calls

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.

Parametersstaterequiredrequest_idanalysis_modeexplain_actionscontract_versionrequiredbudget_score_calls

get_solver_capabilities

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

Takes no parameters.

Version history

1
  1. v0.1.0LatestOct 14, 2026

Score

72% of the applicable checks met

How complete this listing is, computed from the registry entry, the endpoint and public sources. Not a rating of the server and not a statement that it is safe or working today: reachability is a dated check, and no installs or reviews go into the score.

  • Reached in the last 30 daysRequired25 pts
  • Auth declaredRequired10 pts
  • Tools listedRequired15 pts
  • DescriptionRequired15 pts
  • Logo10 pts

    Publish an icon in the registry entry.

  • Documentation15 pts

    Declare a GitHub repository with a README, or serve resource_documentation in the OAuth protected-resource metadata.

  • LicenseNot applicable

    A hosted service is used under its provider's terms, so no license is expected here. This check is left out of the percentage.