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pixelpact-mcp

v0.1.6

Published

MCP server that lets a coding agent measure the UI it just built against the reference

Vulnerabilities

Powered byPowered by Snyk
  • 0High
  • 0Medium
  • 0Low

Links

Git

Maintainers

jamalkamaladdinjamalkamaladdin

Keywords

mcpmodel-context-protocolai-agentcoding-agentvisual-testingplaywright

Readme

pixelpact-mcp

An MCP server that lets a coding agent measure its own UI work against a visual contract, without a human in the loop. It wraps pixelpact-core.

Install

pnpm add -D pixelpact-mcp

Run

pixelpact-mcp

The binary speaks the Model Context Protocol over stdio. Point an MCP client at it, for example by adding it to the client's server list with the command pixelpact-mcp.

Tools

  • extract_contract extracts a visual contract from a reference URL and saves it as JSON.
  • check_implementation measures an implementation URL against a saved contract and returns a formatted deviation table plus numeric totals.
  • diff_pixels compares an implementation URL against the contract's reference screenshot pixel by pixel.
  • read_contract_summary reads a saved contract and describes it without opening a browser.

A typical loop: extract_contract once against the reference design, then check_implementation after each change, then diff_pixels for a stricter final check.

Requirements

Node >= 22.12. Playwright browsers must be installed separately, for example pnpm exec playwright install chromium, since playwright is a peer dependency.