Tailwind Context Resolver MCP server

tailwind-context-resolver-mcp 🎨🐸

An MCP server that loads your project's tailwind.config.ts/js and exposes its actual design system to AI agents — so they stop hallucinating class names.

🤔 The Problem

AI agents generate Tailwind classes based on training data — the default Tailwind docs. Your project is not the default docs.

You have a custom color palette. A non-standard spacing scale. Maybe a prefix like tw-. Brand tokens like bg-brand-primary. The agent doesn't know any of this. It guesses.

The result:

// Agent confidently generates this:
<div className="bg-primary-500 text-brand p-18 tw-flex-center">

// Your project has:
// - bg-brand-primary (not bg-primary-500)
// - no "text-brand" token
// - spacing.18 = 4.5rem (ok actually)
// - no "flex-center" utility
// - no "tw-" prefix

The agent can't validate what it writes because it has no access to your resolved config. It's working from memory of the default theme — not yours.

✅ The Fix

This MCP server runs the Tailwind resolver locally and gives agents a typed, queryable interface to your actual config. Before writing a component, the agent can ask:

• "What brand colors exist in this project?"
• "Is p-18 a valid spacing value here?"
• "Does this project use a custom prefix?"
• "Is bg-brand-primary flex grid a valid class string?"

🛠️ Tools

resolvethemetokens

Query any namespace in the resolved Tailwind theme. Returns all design tokens as flat key-value pairs.

namespace: "colors.brand" → { primary: "#3b82f6", secondary: "#8b5cf6", danger: "#ef4444" }
namespace: "spacing"      → { "1": "0.25rem", "2": "0.5rem", "18": "4.5rem", ... }
namespace: "fontFamily"   → { sans: ["Inter", "sans-serif"], mono: [...] }

Use before generating components to discover what tokens actually exist.

validateclassstring

Validates a Tailwind className string against the project's resolved config. Returns valid classes, invalid (hallucinated) classes, and conflict warnings.

{
  "valid_classes": ["bg-brand-primary", "text-white", "p-4", "hover:bg-brand-secondary", "flex"],
  "invalid_classes": ["bg-fake-token", "text-brand"],
  "warnings": ["Conflicting multiple layout models: flex, grid"],
  "config_prefix": ""
}

Use to catch hallucinated design tokens before writing code.

detectcssconflicts

Detects conflicting Tailwind utilities — e.g. flex + grid, or absolute + fixed on the same element.

{
  "conflicts": [{ "classes": ["flex", "grid"], "reason": "multiple layout models" }],
  "has_conflicts": true
}

getconfigsummary

Returns a compact overview: Tailwind version, prefix, which theme sections are customized, active plugins.

{
  "tailwind_version": "3.4.19",
  "prefix": "",
  "theme_extensions": ["colors", "spacing", "fontFamily"],
  "total_colors": 142,
  "total_spacing": 34,
  "plugins": ["@tailwindcss/forms"]
}

Use first to understand the project's design system before querying specific tokens.

🚀 Setup

Claude Desktop

Add to your claudedesktopconfig.json:

{
  "mcpServers": {
    "tailwind-context-resolver": {
      "command": "npx",
      "args": ["-y", "tailwind-context-resolver-mcp"]
    }
  }
}

Cursor / VS Code / Any MCP client

Shortened. The full README is on GitHub.