Cal Server

Example Use Cases

• 1

  Evaluate user-supplied mathematical expressions (including constants PI and E) and return numeric results.

• 2

  A lightweight stdio-based calculator service to be invoked from fastmcp-compatible clients or automation scripts.

• 3

  Validate and compute complex arithmetic expressions safely using a parsed evaluator (expr-eval) within a Bun runtime.

Description

Cal Server is a small FastMCP-based service that parses and computes mathematical expressions via standard input/output. It uses the expr-eval library for expression parsing and supports built-in constants like PI and E, as well as boolean constants. The project is designed to be minimal and efficient, running on the Bun runtime and suitable for embedding into agent pipelines that need on-the-fly calculations.