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Audit a web page's images: natural vs rendered sizes, oversized detection, and formats.
About
Audit a web page's images: natural vs rendered sizes, oversized detection, and formats.
Security Report
Well-structured MCP server with clean code, proper error handling, and appropriate security controls. The server makes authenticated API calls to imagedimensions.com and processes user-provided URLs without dangerous operations. Minor code quality observations noted but do not impact security posture. Supply chain analysis found 2 known vulnerabilities in dependencies (0 critical, 2 high severity). Package verification found 1 issue.
6 files analyzed · 6 issues found
Security scores are indicators to help you make informed decisions, not guarantees. Always review permissions before connecting any MCP server.
Permissions Required
This plugin requests these system permissions. Most are normal for its category.
What You'll Need
Set these up before or after installing:
Environment variable: IMAGEDIMENSIONS_API_BASE
How to Install
Add this to your MCP configuration file:
{
"mcpServers": {
"io-github-bishop81-imagedimensions-mcp": {
"env": {
"IMAGEDIMENSIONS_API_BASE": "your-imagedimensions-api-base-here"
},
"args": [
"-y",
"imagedimensions-mcp"
],
"command": "npx"
}
}
}Documentation
View on GitHubFrom the project's GitHub README.
imagedimensions-mcp
An MCP server that audits the images on any public web page — natural vs. rendered dimensions, oversized-image detection, and format breakdown — so AI agents (Claude, Cursor, Windsurf, etc.) can check image performance during development.
Powered by imagedimensions.com. The scan runs server-side, so no local browser or Chrome install is required.
Install / run
// Claude Desktop / any MCP client config
{
"mcpServers": {
"imagedimensions": {
"command": "npx",
"args": ["-y", "imagedimensions-mcp"]
}
}
}
Tool
scan_image_dimensions
| Param | Type | Description |
|---|---|---|
url | string (required) | Public URL of the page to audit. |
oversizedThreshold | number (optional) | Area-overshoot ratio to flag as oversized. Default 4 (≈2× per dimension). |
Returns a text report plus structured content:
- total / visible image counts and CSS-background count
- modern-format share (WebP + AVIF)
- format breakdown
- the list of oversized images (natural → rendered, overshoot ratio, format, src)
- a link to the full visual report on imagedimensions.com
Example agent uses: "Audit the images on https://example.com," "Which images on this page are oversized and hurting LCP?", "What % of this site's images use modern formats?"
Why "oversized" matters
An image downloaded much larger than the box it renders into wastes bandwidth and slows Largest Contentful Paint — the most common image-performance mistake on the web. See the writeup.
Config
IMAGEDIMENSIONS_API_BASE— override the API base (defaulthttps://imagedimensions.com).
License
MIT
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