MCP Reasoner MCP Server

MCP Reasoner with multiple reasoning strategies including Beam Search and Monte Carlo Tree Search

Local serverstdio

What is the MCP Reasoner MCP server?

Mcp reasoner mcp server lets Claude, Cursor and other MCP clients work with MCP Reasoner directly. MCP Reasoner with multiple reasoning strategies including Beam Search and Monte Carlo Tree Search.

What MCP Reasoner does

What happened to mcts-001-alpha and mcts-001alt-alpha? > Quite simply: It was useless and near similar to the base mcts method. After initial testing the results yielded in basic thought processes was near similar showing that simply adding policy simulation may not have an effect.

Key capabilities

  • Two search strategies that you can switch between:
  • Beam search (good for straightforward stuff)
  • MCTS (when stuff gets complex) with alpha variations (see above)
  • Tracks how good different reasoning paths are
  • Maps out all the different ways Claude thinks through problems
  • Analyzes how the reasoning process went
  • Follows the MCP protocol (obviously)

Tools it exposes

Once connected, the assistant can call these 2 tools directly:

  • MATH500 — GPQA-Diamond
  • GMSK8 — Maybe Polyglot &/or SWE-Bench

Installing the mcp reasoner mcp server

The server is distributed via npm as npm, so most clients can run it without a manual build step. Add it to your MCP client's configuration and restart the client to pick it up — the copy-paste configs for Claude Desktop, Claude Code and Cursor are on this page.

Where it fits

Developer-tool servers are usually the first ones people connect, because they turn "help me with this code" into an assistant that can actually read the repo and act on it. MCP Reasoner sits in that group, and the shape of its toolset — MATH500, GMSK8 — tells you what it is really for. Worth comparing against the other developer tools servers in this directory before you commit to one, since several overlap in scope but differ sharply in setup cost and permissions.

Practical notes

  • This server runs locally, so it operates with whatever access your machine and its credentials already have. Scope that deliberately rather than by default.
  • Maintained by Jacck.
  • MCP clients ask for confirmation before each tool call by default. Keep that on while you learn what the mcp reasoner mcp server actually does with your data.
  • Every entry in this directory is reviewed by hand before it goes live, and details are checked against the project's own documentation.

Available tools

ToolWhat it does
MATH500GPQA-Diamond
GMSK8Maybe Polyglot &/or SWE-Bench

How to install the MCP Reasoner MCP server

{
  "mcpServers": {
    "mcp-reasoner": {
      "command": "node",
      "args": ["path/to/mcp-reasoner/dist/index.js"],
    }
  }
}

Configuration as documented by the project. Restart the client after saving.

Example prompts to try

  • Use MCP Reasoner to MATH500.
  • Use MCP Reasoner to GMSK8.

Frequently asked questions

It connects MCP Reasoner to MCP-compatible AI assistants such as Claude and Cursor, exposing 2 tools (MATH500, GMSK8) that the assistant can call on your behalf. Instead of copying data back and forth by hand, the assistant works with MCP Reasoner directly.