# crux-mcp

> crux-mcp — miguelrisero-crux-mcp. Use this tool when you need to analyze real-user Core Web Vitals and track historical trends for websites or URLs. It provides insights into LCP, INP, and CLS metrics via natural language queries, helping solve issues related to user experience and performance optimization. Ideal for use cases requiring data-driven decisions on web development and optimization strategies.

Canonical page: https://skillsregistry.net/skills/miguelrisero-crux-mcp  
JSON: https://api.skillsregistry.net/v1/skills/miguelrisero-crux-mcp

## Description

MCP server for the Chrome UX Report, providing real-user Core Web Vitals (LCP, INP, CLS) and historical trends for any origin or URL via natural language queries.

## Trust

- **Trust score (0–1):** 0.69
- **Verification tier:** scanned
- **Last scanned:** 2026-08-29

## Facts

- **Version:** 1.0.0
- **Skill type:** atomic
- **Execution layer:** mcp-remote
- **Runtime environment:** api
- **Category:** other
- **Updated:** 2026-08-29

## Source

- **Source listing:** [Glama](https://glama.ai/mcp/servers/xuu51td6s4)
- **Repository:** <https://github.com/miguelrisero/crux-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": "miguelrisero-crux-mcp"
    }
  }
}
```

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