# mcp-sandbox

> Use this tool when you need to verify server responses or test API integrations, as it provides a public MCP server with a unique 'identity' tool that returns a canary string for validation purposes. It solves problems related to testing and debugging by offering a reliable test fixture for developers and QA engineers. Ideal for use cases requiring verification of server connectivity and response integrity.

Canonical page: https://skillsregistry.net/skills/heptafox-mcp-sandbox  
JSON: https://api.skillsregistry.net/v1/skills/heptafox-mcp-sandbox

## Description

A public MCP server providing test fixtures for developers and QA, with a single tool 'identity' that returns a unique canary string to verify the server's response.

## Trust

- **Trust score (0–1):** 0.70
- **Verification tier:** verified
- **Last scanned:** 2026-08-30

## Facts

- **Version:** 1.0.0
- **Skill type:** atomic
- **Execution layer:** mcp-remote
- **Runtime environment:** api
- **Category:** other
- **Updated:** 2026-08-30

## Source

- **Source listing:** [Glama](https://glama.ai/mcp/servers/gijsnctc2y)
- **Repository:** <https://github.com/heptafox/mcp-sandbox>

## 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": "heptafox-mcp-sandbox"
    }
  }
}
```

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

---
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