MCP Expr Lang

MCP Expr-Lang

[](https://smithery.ai/server/@ivan-saorin/mcp-expr-lang)

A powerful expression evaluation tool for Claude Desktop using the Model Context Protocol (MCP).

Overview

MCP Expr-Lang provides a seamless integration between Claude AI and the powerful expr-lang expression evaluation engine. This tool allows you to perform complex data manipulations, calculations, and transformations directly within your Claude conversations.

With MCP Expr-Lang, you can:

• Evaluate mathematical expressions
• Transform and filter arrays and objects
• Sort complex data structures
• Perform string manipulations
• Use conditional logic
• And much more!

Installation

Installing via Smithery

To install MCP Expr-Lang for Claude Desktop automatically via Smithery:

Prerequisites

• Go 1.18 or higher
• Claude Desktop application
• Git

Step 1: Clone the Repository

Step 2: Install Dependencies

Step 3: Build the Application

For Windows

For macOS/Linux

Step 4: Configure Claude Desktop

1. 1.Open Claude Desktop
2. 2.Go to Settings
3. 3.Navigate to the "Advanced" section
4. 4.Add the following configuration to your config.json:

For Windows

For macOS/Linux

1. 1.Save the configuration and restart Claude Desktop

Usage

Once installed, you can use the eval tool directly in your conversations with Claude. Simply ask Claude to evaluate an expression using the tool.

Basic Example

Complex Example

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Works with Claude (desktop and mobile), Cursor, Windsurf, VS Code, and any MCP-compatible AI app.

Category: Developer Tools