"CSS" matching MCP servers:

Enables AI coding assistants to inspect real rendered pages, find invisible elements or stacking-context issues blocking clicks, and get the exact CSS rule and smallest fix. It exposes tools for scanning blockers, inspecting click targets, element stacks, and CSS rules over stdio.

Lets AI agents visually inspect web elements, test CSS edits in real-time, and iterate until pixel-perfect, functioning like browser DevTools for debugging UI issues.

AI-powered QA testing platform — catches JS errors, accessibility failures, visual regressions, API loops, security issues, and more via Chrome DevTools MCP

Eyes for AI coding agents: deterministic MCP server that tells the LLM which CSS rule wins, in which file, on which line — and why. Cascade verdicts, blast radius, interaction timelines, pixel-perfect audits.

Enables AI coding assistants to validate HTML/CSS markup using W3C APIs, perform technical SEO audits, check broken links, and validate JSON-LD schemas directly in local workspaces.

Deterministic motion compiler + validator for AI-generated web apps: validated MotionSpec JSON compiles to reduced-motion-safe GSAP/CSS. Reports WCAG 2.2.2 pause-path candidates; missing reduced-motion guards flagged as 2.3.3/AAA best practice. Keyless read-only MCP tools: motion_catalog + motion_validate; compile/audit/stats need a key (full toolset free locally: npx motionspec). MIT core on npm.

Enables coding agents to examine a rendered web page by cross-checking what the browser reports about the DOM/CSS against what is actually painted in pixels, pinpointing which element is broken and the evidence why. Reports visual problems without requiring a baseline, and is designed to grow into design-token extraction and accessibility/UX audits built on Playwright.

Provides intelligent CSS/JS feature compatibility checking with configurable browser targets, polyfill support, and smart project scanning. Enables developers to automatically detect browser compatibility issues and get actionable remediation steps with build tool configurations.

Renders responsive web pages with Playwright and detects Korean and English words split across visual lines, reports avoidable mid-word wraps and embedded hard newlines, and provides CSS fix suggestions with dry-run or explicitly allowed application.

Enables style verification and CSS inspection through Chrome DevTools Protocol, using JSON specs to check computed styles, find elements, and interact with pages.

MCP server exposing 5 Chrome DevTools Protocol domains (Fetch, Emulation, Accessibility, Performance, CSS) with 38 tools for advanced browser automation and debugging.

Enables AI agents to query a compiler-verified C/C++ knowledge graph built from Coverity build capture, exposing read-only lookups of translation units and their compile flags, entity definitions and fuzzy symbol search, call edges, blast radius, shortest call paths, function-level ASTs, and Coverity defects with checker and severity details.

Enables AI agents to render HTML and audit its typography using book-quality Knuth–Plass line breaking, hyphenation, and microtypography in a headless browser, returning markup diagnostics and a page screenshot for visual, iterative CSS refinement.

Provides a universal developer operations and diagnostics toolkit with sandboxed code execution, algorithm stress testing, security secret scanning, AST-based code fixes, and a visual dashboard for ERD, port/process inspection, and differential testing.

Enables comprehensive UI/UX development workflows through integrated tools for component development with Storybook, Tailwind CSS styling, Framer Motion/GSAP animations, Playwright testing, and automated design system generation. Provides end-to-end automation for visual regression testing, accessibility compliance, and UX optimization analysis.

Enables AI agents to drive live mobile and desktop browser sessions and measure web/responsive UIs directly from the DOM — computing contrast ratios, touch-target sizes, overflow, clipping, and theme drift as precise text findings tied to CSS selectors instead of screenshot guesswork. A human and the agent share the same live session, so pinned notes, navigation, taps, and device or theme switches are visible to both.

Design review for UI code, inside your coding agent. Reviews React, Vue, Svelte, CSS and SwiftUI against 313 rules and returns scored findings with file:line fixes your agent can apply and verify.

Enables AI apps to create and edit real HTML/CSS designs on a live multi-device canvas, manage projects and assets, collect element-pinned feedback, run automated QA, and export clean code through MCP tools.

MCP server that certifies or refutes the soundness of linear integer guards over declared boxes, returning concrete counterexamples when unsound and honest refusals when the domain is too large.

MCP server providing email client compatibility data from caniemail.com, enabling agents to lint HTML/CSS for email client support, check feature support across clients, and search for features by keyword, with verdicts including supported, unsupported, mitigated, and untested.