state-of-cwv

state-of-cwv is an MCP server for Claude Code, Codex, Cursor, Gemini CLI, OpenCode from corewebvitals/state-of-cwv-mcp. Its token cost is not measured, scanned A, original, MIT.

A remote data service for comparing Core Web Vitals, Google's measures of website loading speed, responsiveness, and visual stability, across content-management systems (CMSs), CDNs, and programming frameworks.

In plain words
What is it for?
It is for checking how website performance metrics differ by CMS, CDN, or framework through a coding agent.
Why use it?
It provides this comparison data without requiring login or a local service.

MCP server for Claude CodeCodexCursorGemini CLIOpenCode

Written for no agent in particular: it speaks MCP, so any client can run it.

Good fit It is for checking how website performance metrics differ by CMS, CDN, or framework through a coding agent.

Compare 6 mcp servers from other repositories ↓
Install with agentmods
npx agentmods add mcp/corewebvitals/state-of-cwv-mcp/state-of-cwv
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Clone the repo
git clone --depth 1 https://github.com/corewebvitals/state-of-cwv-mcp

Made for: Claude Code, Codex, Cursor, Gemini CLI, OpenCode.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for state-of-cwv

README.md
[![agentmods](https://agentmods.dev/badge/mcp/corewebvitals/state-of-cwv-mcp/state-of-cwv/github.svg)](https://agentmods.dev/mcp/corewebvitals/state-of-cwv-mcp/state-of-cwv)
Your own site
<a href="https://agentmods.dev/mcp/corewebvitals/state-of-cwv-mcp/state-of-cwv"><img src="https://agentmods.dev/badge/mcp/corewebvitals/state-of-cwv-mcp/state-of-cwv/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for state-of-cwv

Your own site · 80×15
<a href="https://agentmods.dev/mcp/corewebvitals/state-of-cwv-mcp/state-of-cwv"><img src="https://agentmods.dev/badge/mcp/corewebvitals/state-of-cwv-mcp/state-of-cwv.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session not measured What this adds to a session before it is invoked.
When invoked not measured Not applicable: nothing here is loaded into a session.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Security

Grade A, and why

state-of-cwv scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 11d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

server.json · 6 lines

What it actually says

{
  "state-of-cwv": {
    "url": "https://www.corewebvitals.io/api/state-of-cwv/mcp",
    "type": "streamable-http"
  }
}
Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 11d ago First seen · 6 lines scan A ed7085604def

Subscribe to this mod's changes

state-of-cwv is an MCP server published in the GitHub repository corewebvitals/state-of-cwv-mcp (0 stars, last pushed 1mo ago), licensed MIT. Its token cost is not measured: an MCP server costs its tool schemas, not its config file. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.