https://www.ux-components.com/
UX Components is a reference library for understanding and comparing interface components across established design systems. Rather than documenting one particular system, it brings together common UI patterns and shows how different systems name, define and use them. This makes it useful for resolving the inconsistencies that often exist around components such as dialogs, dropdowns, selects, tabs and navigation patterns.
The library includes component guidance, states, alternatives, icon references, accessibility mappings and comparisons across a large collection of design systems. Its value is less about providing another component library to copy from and more about creating a common vocabulary for understanding how interface patterns work across different products and systems.
A particularly useful addition is its MCP server, which makes this knowledge available directly to AI tools and coding agents. An agent can query UX Components to identify an appropriate pattern for a particular interaction, compare similar components, understand required states or translate terminology between design systems. This provides AI-assisted design and development with a structured UX reference rather than relying entirely on whatever patterns the model generates from its training.
For designers and design technologists, UX Components therefore works both as a practical research resource and as an example of how established UX knowledge can be made available to AI-assisted product development.