# mcp

Scan a web app, archive public pages, or run E2E flows against a deployed site. Give your agent tools to check changes in the browser.

- MCP server · `type=mcp` · Claude Code, Codex, Cursor, GitHub Copilot, Windsurf (Devin Desktop), Cline, Zed, Gemini CLI
- Author: siteglassio
- License: MIT · policy=link-only · description only; the file stays with the author
- Source: https://github.com/siteglassio/siteglass-mcp
- Updated: 2026-07-19
- HTML: https://affpapa.org/en/nevibecode/mcp/siteglassio-mcp

## What it does

\`siteglass-mcp` provides tools for inspecting web apps and capturing pages. `siteglass_scan_local` opens a development app in a browser on your machine and reports broken links or assets, console errors, accessibility findings, and SEO issues. For a public page, `siteglass_render` can create an rrweb capture, PDF, or PNG.

For a deployed site, the server can register and verify ownership, scan pages, derive E2E flows, and run them. Flow results include step status, screenshots, video, and an rrweb replay; test credentials can be supplied for authenticated flows. Longer operations return an ID that the agent can check with a matching `get_*` tool.

Local scans need no authentication. Hosted tools create and cache an API key at `~/.siteglass/key`, or can use `SITEGLASS_API_KEY`. The first scan for a site is free; later scans and flow runs use credits from a prepaid balance. A site that blocks datacenter IPs can return an empty capture.

## Requirements
- Needs: Node.js (commands run via npx)
- Environment variables: `SITEGLASS_API_KEY`, `SITEGLASS_BASE_URL` — keys and tokens: ask the human for the values, never commit them or put them in shared files.

## Install

### Claude Code (native platform)

**Platform CLI**
```bash
claude mcp add --env SITEGLASS_API_KEY=<SITEGLASS_API_KEY> --env SITEGLASS_BASE_URL=<SITEGLASS_BASE_URL> --transport stdio siteglassio-mcp -- npx -y siteglass-mcp
```
Replace <…> with your own values

### Codex

**Platform CLI**
```bash
codex mcp add siteglassio-mcp --env SITEGLASS_API_KEY=<SITEGLASS_API_KEY> --env SITEGLASS_BASE_URL=<SITEGLASS_BASE_URL> -- npx -y siteglass-mcp
```
Replace <…> with your own values

### Cursor

**Config file**
File `.cursor/mcp.json`:
```json
{
    "mcpServers": {
        "siteglassio-mcp": {
            "command": "npx",
            "args": [
                "-y",
                "siteglass-mcp"
            ],
            "env": {
                "SITEGLASS_API_KEY": "<SITEGLASS_API_KEY>",
                "SITEGLASS_BASE_URL": "<SITEGLASS_BASE_URL>"
            }
        }
    }
}
```
Replace <…> with your own values

### GitHub Copilot

**Config file**
File `.vscode/mcp.json`:
```json
{
    "servers": {
        "siteglassio-mcp": {
            "type": "stdio",
            "command": "npx",
            "args": [
                "-y",
                "siteglass-mcp"
            ],
            "env": {
                "SITEGLASS_API_KEY": "<SITEGLASS_API_KEY>",
                "SITEGLASS_BASE_URL": "<SITEGLASS_BASE_URL>"
            }
        }
    }
}
```
Replace <…> with your own values

### Gemini CLI

**Platform CLI**
```bash
gemini mcp add -e SITEGLASS_API_KEY=<SITEGLASS_API_KEY> -e SITEGLASS_BASE_URL=<SITEGLASS_BASE_URL> siteglassio-mcp npx -y siteglass-mcp
```
Replace <…> with your own values

## When to use it
- find broken links and console errors in a development app
- check pages for accessibility and SEO issues
- save a public page as a PDF, PNG, or rrweb capture
- derive E2E flows from a site scan
- review flow steps with screenshots and video

## Example prompts
- Scan my app and report the issues you find.
- Archive this public page as a PDF.
- Generate E2E flows for the site and run them with test credentials.

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