# Cal Server

> Use this tool when you need to evaluate mathematical expressions and calculate precise results. It solves problems involving basic arithmetic operations, trigonometry, and constant values like PI and E, making it ideal for scientific, engineering, and educational applications. The Cal Server takes user-input expressions as text and returns computed results as output, providing a straightforward interface for mathematical computations.

Canonical page: https://skillsregistry.net/skills/pwh-pwh-cal-mcp  
JSON: https://api.skillsregistry.net/v1/skills/pwh-pwh-cal-mcp

## Description

A mathematical expression calculator that processes user-input expressions and returns computed results, supporting basic operations and built-in constants like PI and E.

## Trust

- **Trust score (0–1):** 0.70
- **Verification tier:** verified
- **Last scanned:** 2026-09-02

## Facts

- **Version:** 1.0.0
- **Skill type:** atomic
- **Execution layer:** mcp-remote
- **Runtime environment:** api
- **Category:** other
- **Updated:** 2026-09-02

## Source

- **Source listing:** [Glama](https://glama.ai/mcp/servers/nspz0vl14d)
- **Repository:** <https://github.com/pwh-pwh/cal-mcp>

## Use it

Resolve this record through the SkillsRegistry MCP server (no auth, read-only):

```
claude mcp add --transport http --scope user skillsregistry https://api.skillsregistry.net/mcp
```

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "get_skill",
    "arguments": {
      "slug": "pwh-pwh-cal-mcp"
    }
  }
}
```

REST: `GET https://api.skillsregistry.net/v1/skills/pwh-pwh-cal-mcp` · pull for local use: `GET https://api.skillsregistry.net/v1/skills/pwh-pwh-cal-mcp/pull`

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SkillsRegistry indexes agent skills from public registries and GitHub. Skills we have analysed are scanned with Circle-IR and scored on six dimensions; each listing states its scan coverage. More: https://skillsregistry.net/llms.txt