SyteCheck MCP server

SyteCheck MCP Server

Run website audits from Claude, ChatGPT, Cursor, or any other MCP client, and get the findings back as text you can act on.

SyteCheck scans a page across ten dimensions — HTML validity, SEO, broken links, accessibility (WCAG 2.2 AA via axe-core), performance (a real Lighthouse run), security headers, responsive layout, AI visibility, content freshness, and an AI critique of the visual design — and returns a scored, plain-language report.

A free account works. No card, no trial clock: the free tier includes three scans a month across three categories, which is enough to wire this up and see a real report before deciding whether to pay for more.

Quickstart

email.

1. Create an account at sytecheck.app and verify your

the model to read existing scans but never spend quota. The secret is shown once.

1. Mint a key at Account → API keys. Choose scans:read only if you want

1. Add the server to your client, using one of the recipes below.

Claude Code

claude mcp add sytecheck --env SYTECHECK_API_KEY=sck_your_key_here \
  -- npx -y @ascentws/sytecheck-mcp

Claude Desktop

Edit claudedesktopconfig.json (Settings → Developer → Edit Config):

{
  "mcpServers": {
    "sytecheck": {
      "command": "npx",
      "args": ["-y", "@ascentws/sytecheck-mcp"],
      "env": { "SYTECHECK_API_KEY": "sck_your_key_here" }
    }
  }
}

Cursor

Add to .cursor/mcp.json in your project, or the global equivalent:

{
  "mcpServers": {
    "sytecheck": {
      "command": "npx",
      "args": ["-y", "@ascentws/sytecheck-mcp"],
      "env": { "SYTECHECK_API_KEY": "sck_your_key_here" }
    }
  }
}

Gemini CLI / Antigravity CLI

Add to ~/.gemini/settings.json (or the Antigravity equivalent):

{
  "mcpServers": {
    "sytecheck": {
      "command": "npx",
      "args": ["-y", "@ascentws/sytecheck-mcp"],
      "env": { "SYTECHECK_API_KEY": "sck_your_key_here" }
    }
  }
}

OpenAI Agents SDK

from agents import Agent
from agents.mcp import MCPServerStdio

sytecheck = MCPServerStdio(
    params={
        "command": "npx",
        "args": ["-y", "@ascentws/sytecheck-mcp"],
        "env": {"SYTECHECK_API_KEY": "sck_your_key_here"},
    }
)

agent = Agent(
    name="Site auditor",
    instructions="Audit sites with SyteCheck and explain what to fix.",
    mcp_servers=[sytecheck],
)

Then ask: "Scan https://example.com and tell me what to fix first."

Tools

There is also a scan-and-remediate prompt that scans a URL and turns the findings into a prioritized fix plan.

A note on cost

runscan is the only tool that spends anything, and it spends real money: a scan opens a browser, runs Lighthouse, and calls a vision model. It is marked non-read-only so your client asks before running it, and its description tells the model to check remaining quota first and not to re-scan an unchanged page. On a free account you have three scans a month — an agent looping over runscan would exhaust that in one turn.

Shortened. The full README is on GitHub.