# MCP Playground Server

> Use this tool when you need to practice and demonstrate basic math operations, string manipulation, and greeting functionality in a simple educational setting. The MCP Playground Server solves problems related to learning and testing MCP tool implementation, accepting input requests and returning output results. It is ideal for educational contexts where basic programming concepts and MCP tools need to be explored and understood.

Canonical page: https://skillsregistry.net/skills/frifri-mcp-playground  
JSON: https://api.skillsregistry.net/v1/skills/frifri-mcp-playground

## Description

A simple educational MCP server providing basic math operations, string manipulation, and greeting functionality. Demonstrates how to implement MCP tools for learning purposes.

## Trust

- **Trust score (0–1):** 0.60
- **Verification tier:** unverified

## Facts

- **Version:** 1.0.0
- **Skill type:** atomic
- **Execution layer:** mcp-remote
- **Runtime environment:** api
- **Category:** other
- **Updated:** 2026-04-22

## Source

- **Source listing:** [Glama](https://glama.ai/mcp/servers/p9dgapbrzk)
- **Repository:** <https://github.com/frifri/mcp_playground>

## 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": "frifri-mcp-playground"
    }
  }
}
```

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