What does the UX/UI Principles REST API include?

The REST API lets you query 168 research-backed UX/UI principles programmatically. It includes 1,000 requests per hour, JSON responses with scientific basis, real-world examples, and AI prompts per principle.

How does the MCP Server work with Claude?

The MCP Server connects directly to Claude Code and Claude Desktop to provide real-time UX suggestions as you code. It automatically validates your design decisions against 168 principles with academic citations.

What is the Cursor Context Pack?

The Cursor Context Pack includes 9 .cursorrules templates optimized for different domains: universal base, SaaS, e-commerce, mobile, dashboards, forms, AI chat, landing pages, and documentation. Each template injects relevant UX principles into your development workflow.

Can I try the products before buying?

The 5 free validation tools (AI Prompts, Validator, Flows, UX Smells, and Parts Checklist) demonstrate the quality of the principles. All paid products include a 30-day money-back guarantee.

UX Principles forAI-Assisted Development

Multi-turn conversations improve task success by 5x. Get research-backed UX guidance directly in your IDE, API, or Claude.

Get Developer Bundle

View API Docs

168Principles

2,098+Citations

5xBetter w/ Iteration

Choose YourIntegration

Pick the way that fits your workflow. All products work together.

Best Value

Developer Bundle

$38$29/year

API access, Claude integration, and 5 agent skills for Cursor, Windsurf, and kx — in one package.

REST API + MCP Server included
1,000 requests/hour
Works with Claude Code & Desktop
5 Agent Skills (SKILL.md) for Cursor, Windsurf, kx

Get the Bundle

REST API

$19/year

Query 168 principles programmatically. Build custom tools or integrate into your pipeline.

All 168 principles + metadata
UX Smells & Flow endpoints
1,000 requests/hour
JSON responses, simple auth

Get API Access View Details

MCP Server

$19/year

Get UX suggestions directly in Claude. No copy-paste, no context switching.

Claude Code & Desktop support
Context preserved across turns
Ask follow-ups, refine designs
Auto-updates included

Add to Claude View Details

Cursor Context Pack

$5one-time

Pre-built .cursorrules files. Drop in and start coding with UX principles.

Ready-to-use .cursorrules
Domain-specific templates
Works with any Cursor project
Use across all your projects

Download Pack View Details

How ItWorks

From research to implementation — principles that improve real designs

Research-Backed

168 principles from 2,098+ peer-reviewed papers in cognitive science, HCI, and behavioral psychology.

Battle-Tested

Every principle validated across real products — from startups to Fortune 500 design systems.

AI-Optimized

Structured for LLMs — clear examples, code snippets, and prompts that actually work with Claude and Cursor.

Iterative by Design

Built for multi-turn workflows. Context preserved across conversations for 5x better results.

Built for HowYou Actually Work

Iterate with Claude

MCP Server keeps UX context across conversations. Ask follow-up questions, refine designs, validate iterations.

Validate in CI/CD

REST API integrates with your pipeline. Check designs against principles before deployment.

Start Fast in Cursor

Context Packs bootstrap your .cursorrules with UX principles. Jump straight into building.

API Quick Reference

https://uxuiprinciples.com/api/v1

GET/principles168 UX principles with metadata

GET/smellsProUX anti-patterns with fix recipes

GET/flowsProUser flow checklists

MCP Server Setup

Add to Claude Code or Claude Desktop:

{
  "mcpServers": {
    "uxui-principles": {
      "command": "npx",
      "args": ["-y", "@uxuiprinciples/mcp-server"],
      "env": { "UXUI_API_KEY": "uxui_live_xxx" }
    }
  }
}

get_principlesearch_principlesdetect_smellget_flow

Start Buildingwith UX Principles

Get the Developer Bundle — API + MCP for $29/year

Get Developer Bundle

30-day money-back guarantee

UX Principles forAI-Assisted Development

Multi-turn conversations improve task success by 5x. Get research-backed UX guidance directly in your IDE, API, or Claude.

Get Developer Bundle

View API Docs

168Principles

2,098+Citations

5xBetter w/ Iteration

Choose YourIntegration

Pick the way that fits your workflow. All products work together.

Best Value

Developer Bundle

$38$29/year

API access, Claude integration, and 5 agent skills for Cursor, Windsurf, and kx — in one package.

REST API + MCP Server included
1,000 requests/hour
Works with Claude Code & Desktop
5 Agent Skills (SKILL.md) for Cursor, Windsurf, kx

Get the Bundle

REST API

$19/year

Query 168 principles programmatically. Build custom tools or integrate into your pipeline.

All 168 principles + metadata
UX Smells & Flow endpoints
1,000 requests/hour
JSON responses, simple auth

Get API Access View Details

MCP Server

$19/year

Get UX suggestions directly in Claude. No copy-paste, no context switching.

Claude Code & Desktop support
Context preserved across turns
Ask follow-ups, refine designs
Auto-updates included

Add to Claude View Details

Cursor Context Pack

$5one-time

Pre-built .cursorrules files. Drop in and start coding with UX principles.

Ready-to-use .cursorrules
Domain-specific templates
Works with any Cursor project
Use across all your projects

Download Pack View Details

How ItWorks

From research to implementation — principles that improve real designs

Research-Backed

168 principles from 2,098+ peer-reviewed papers in cognitive science, HCI, and behavioral psychology.

Battle-Tested

Every principle validated across real products — from startups to Fortune 500 design systems.

AI-Optimized

Structured for LLMs — clear examples, code snippets, and prompts that actually work with Claude and Cursor.

Iterative by Design

Built for multi-turn workflows. Context preserved across conversations for 5x better results.

Built for HowYou Actually Work

Iterate with Claude

MCP Server keeps UX context across conversations. Ask follow-up questions, refine designs, validate iterations.

Validate in CI/CD

REST API integrates with your pipeline. Check designs against principles before deployment.

Start Fast in Cursor

Context Packs bootstrap your .cursorrules with UX principles. Jump straight into building.

API Quick Reference

https://uxuiprinciples.com/api/v1

GET/principles168 UX principles with metadata

GET/smellsProUX anti-patterns with fix recipes

GET/flowsProUser flow checklists

MCP Server Setup

Add to Claude Code or Claude Desktop:

{
  "mcpServers": {
    "uxui-principles": {
      "command": "npx",
      "args": ["-y", "@uxuiprinciples/mcp-server"],
      "env": { "UXUI_API_KEY": "uxui_live_xxx" }
    }
  }
}

get_principlesearch_principlesdetect_smellget_flow

Start Buildingwith UX Principles

Get the Developer Bundle — API + MCP for $29/year

Get Developer Bundle

30-day money-back guarantee