# return0

> Use this tool when you need to debug Node.js applications in real-time, especially in production environments like Vercel, to overcome traditional debugging challenges. It provides live variable data, types, and timestamps, enabling efficient debugging of Next.js apps directly within AI IDEs like Cursor. The return0 tool offers a variable_extractor feature for seamless debugging, making it an ideal solution for production debugging needs.

Canonical page: https://skillsregistry.net/skills/return0  
JSON: https://api.skillsregistry.net/v1/skills/return0

## Description

MCP server for return0 production debugging tool enabling real-time debugging of Node.js applications. Provides variable_extractor tool that retrieves live variable data, types, and timestamps from running applications. Designed for debugging production Next.js apps on platforms like Vercel directly within AI IDEs like Cursor. Addresses challenge that traditional debugging methods can be difficult in production environments.

## Trust

- **Trust score (0–1):** 0.63
- **Verification tier:** scanned
- **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:** [PulseMCP](https://www.pulsemcp.com/servers/return0)
- **Repository:** <https://github.com/getreturn0/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": "return0"
    }
  }
}
```

REST: `GET https://api.skillsregistry.net/v1/skills/return0` · pull for local use: `GET https://api.skillsregistry.net/v1/skills/return0/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