{"passport":{"unfragile":{"@version":"1.0","version":"2026-05","artifact":{"id":"awesome-21st-dev-magic","slug":"21st-dev-magic","name":"21st.dev Magic","type":"mcp","url":"https://github.com/21st-dev/magic-mcp","page_url":"https://unfragile.ai/21st-dev-magic","categories":["mcp-servers"],"tags":[],"pricing":{"model":"open_source","free":true,"starting_price":null},"status":"active","verified":false},"capabilities":[{"id":"awesome-21st-dev-magic__cap_0","uri":"capability://code.generation.editing.mcp.based.ui.component.generation.with.design.system.integration","name":"mcp-based ui component generation with design system integration","description":"Generates production-ready UI components by exposing a Model Context Protocol (MCP) server that LLM clients can invoke to create components aligned with 21st.dev design patterns. The system works by registering component templates and design tokens as MCP tools, allowing Claude or other MCP-compatible clients to call structured functions that output React/Vue/HTML components with built-in styling and accessibility features inherited from the 21st.dev design system.","intents":["Generate UI components programmatically without manually writing boilerplate HTML/CSS","Ensure consistency across generated components by enforcing design system constraints through MCP schema validation","Integrate component generation into LLM-powered development workflows and AI agents","Create components that match 21st.dev's design patterns and best practices automatically"],"best_for":["AI engineers building LLM-powered code generation tools","Teams using Claude or other MCP-compatible LLMs for UI development","Developers wanting to enforce design system compliance programmatically","Startups building AI-assisted design-to-code pipelines"],"limitations":["Limited to component types pre-defined in the 21st.dev design system — custom component archetypes require extending the MCP server","Requires MCP client support; not compatible with REST API-only LLM integrations","No real-time preview or visual feedback loop — output must be rendered separately","Design system updates require redeploying the MCP server; no hot-reload of design tokens"],"requires":["MCP-compatible LLM client (Claude, or custom client with MCP support)","Node.js 16+ for running the MCP server","Understanding of MCP protocol and tool schema definition","Access to 21st.dev design system documentation or source"],"input_types":["natural language component descriptions","structured MCP tool invocation parameters","design token specifications"],"output_types":["React JSX components","HTML with inline/CSS-in-JS styling","Vue single-file components","component metadata and accessibility attributes"],"categories":["code-generation-editing","tool-use-integration"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"awesome-21st-dev-magic__cap_1","uri":"capability://code.generation.editing.design.system.token.mapping.and.constraint.enforcement","name":"design system token mapping and constraint enforcement","description":"Encodes 21st.dev design tokens (colors, typography, spacing, shadows, etc.) as MCP tool parameters with type constraints and enum validation, ensuring generated components respect design system rules at generation time rather than requiring post-hoc validation. The system maps semantic token names (e.g., 'primary-action', 'body-text') to concrete CSS values and enforces valid combinations through JSON schema validation on tool invocation.","intents":["Ensure all AI-generated components use only approved design tokens from the 21st.dev system","Prevent design drift by making invalid token combinations impossible at the MCP schema level","Reduce manual review overhead by catching design violations before component rendering","Enable LLMs to reason about design constraints through structured tool parameters"],"best_for":["Design-conscious teams using AI for component generation","Organizations with strict design system compliance requirements","Teams building internal component libraries with AI assistance"],"limitations":["Token set must be manually curated and kept in sync with design system source of truth","No support for dynamic token generation or runtime theme switching","Constraint validation is schema-based only; semantic design rules (e.g., 'never use red on dark backgrounds') require custom logic","Requires design system to be formalized as structured data; informal or CSS-only systems need migration"],"requires":["Formalized 21st.dev design token definitions (JSON, CSS variables, or design tokens format)","MCP server with JSON schema support for parameter validation","Design system documentation mapping token names to use cases"],"input_types":["design token specifications","component requirements with token references","design system rules as JSON schema"],"output_types":["validated component code with design tokens applied","schema validation errors with remediation suggestions","token usage reports"],"categories":["code-generation-editing","data-processing-analysis"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"awesome-21st-dev-magic__cap_2","uri":"capability://code.generation.editing.multi.framework.component.output.with.framework.agnostic.templates","name":"multi-framework component output with framework-agnostic templates","description":"Generates components in multiple frameworks (React, Vue, HTML/CSS) from a single component definition by using framework-agnostic template abstractions and transpilation logic. The MCP server maintains template definitions parameterized by framework, allowing a single LLM request to produce React JSX, Vue SFCs, or vanilla HTML+CSS outputs with consistent styling and behavior across all targets.","intents":["Generate components for multiple frontend frameworks without separate prompts or tool calls","Maintain consistency across React, Vue, and vanilla implementations of the same component","Support teams using mixed-framework stacks without duplicating component definitions","Reduce maintenance burden by updating component logic in one place"],"best_for":["Teams with polyglot frontend stacks (React + Vue + legacy HTML)","Component library maintainers serving multiple framework communities","Enterprises migrating between frameworks incrementally"],"limitations":["Framework-specific features (e.g., React hooks, Vue composition API) require manual adaptation — transpilation is syntax-level only","State management patterns differ across frameworks; generated components may need custom hooks/stores","CSS-in-JS vs CSS modules vs scoped styles require framework-specific handling; not fully abstracted","Testing and accessibility validation must be done per-framework; no unified test generation"],"requires":["Template definitions for each supported framework","Framework-specific code generation rules (AST transformation or string templating)","Understanding of framework-specific idioms and best practices"],"input_types":["component specification (props, state, behavior)","target framework(s) (React, Vue, HTML)","design tokens and styling rules"],"output_types":["React JSX (.jsx/.tsx files)","Vue single-file components (.vue files)","HTML + CSS files","component metadata (props types, slots, events)"],"categories":["code-generation-editing"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"awesome-21st-dev-magic__cap_3","uri":"capability://safety.moderation.accessibility.compliance.validation.in.generated.components","name":"accessibility compliance validation in generated components","description":"Automatically validates generated components against WCAG 2.1 AA standards by injecting accessibility checks into the code generation pipeline. The system verifies semantic HTML structure, ARIA attributes, color contrast ratios, keyboard navigation support, and focus management through static analysis of generated code and optional runtime validation, emitting warnings or errors when accessibility violations are detected.","intents":["Ensure AI-generated components meet accessibility standards without manual auditing","Catch accessibility regressions early in the generation process","Educate LLMs about accessibility best practices through validation feedback","Generate components that are usable by people with disabilities by default"],"best_for":["Teams with accessibility compliance requirements (government, healthcare, finance)","Organizations building public-facing products with diverse user bases","Developers wanting to shift accessibility left in the development process"],"limitations":["Static analysis cannot catch all accessibility issues; runtime testing and user testing still required","Color contrast validation requires design token metadata; custom colors may not be validated","Keyboard navigation and screen reader testing require manual verification or Playwright/Cypress integration","ARIA attribute validation is schema-based; semantic correctness requires domain knowledge"],"requires":["WCAG 2.1 rule definitions encoded as validation rules","Design token metadata including color values for contrast checking","Optional: axe-core or similar accessibility testing library integration"],"input_types":["generated component code (HTML, JSX, Vue)","design tokens with color values","accessibility requirements specification"],"output_types":["accessibility validation report","warnings and errors with remediation suggestions","WCAG compliance score or level (A, AA, AAA)"],"categories":["safety-moderation","code-generation-editing"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"awesome-21st-dev-magic__cap_4","uri":"capability://code.generation.editing.component.composition.and.nesting.with.dependency.resolution","name":"component composition and nesting with dependency resolution","description":"Enables generation of complex components by composing smaller components together, with automatic dependency resolution and import statement generation. When an LLM requests a component that depends on other components (e.g., a Form that uses Input, Button, and Label), the system resolves dependencies, generates all required sub-components, and produces correctly-ordered import statements and component hierarchies.","intents":["Generate complex, multi-component UI layouts without manually specifying all sub-component dependencies","Automatically resolve and generate missing component dependencies","Produce import statements and component hierarchies that are immediately runnable","Build component trees that respect composition patterns and avoid circular dependencies"],"best_for":["Developers building complex UI layouts with AI assistance","Component library maintainers generating interdependent component sets","Teams using AI to scaffold entire feature UIs from high-level descriptions"],"limitations":["Dependency resolution is based on component registry; custom or external components require manual registration","Circular dependencies are detected but not automatically resolved; requires manual intervention","Component composition patterns are inferred from templates; complex composition logic may require custom rules","No support for lazy loading or code splitting; all dependencies are eagerly imported"],"requires":["Component registry with metadata (props, dependencies, exports)","Dependency resolution algorithm (topological sort or similar)","Component template definitions with dependency declarations"],"input_types":["high-level component request (e.g., 'create a login form')","component registry with dependency metadata","composition rules and patterns"],"output_types":["generated component code with all dependencies","import statements in correct order","component tree visualization or metadata","dependency graph"],"categories":["code-generation-editing","planning-reasoning"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"awesome-21st-dev-magic__cap_5","uri":"capability://tool.use.integration.interactive.component.preview.and.iteration.through.mcp.callbacks","name":"interactive component preview and iteration through mcp callbacks","description":"Provides a feedback loop for iterating on generated components by allowing LLM clients to request previews, receive visual feedback, and refine components through multiple MCP tool invocations. The system can optionally integrate with a preview server or browser automation to render components and return visual representations (screenshots, accessibility trees) that inform subsequent generation iterations.","intents":["Iterate on component designs based on visual feedback without manual rendering","Enable LLMs to see the output of their generation and refine based on visual results","Reduce the feedback loop between generation and validation","Support multi-turn conversations about component design and refinement"],"best_for":["Interactive AI-assisted design tools and chatbots","Developers wanting real-time feedback on generated components","Teams building AI agents that can reason about visual design"],"limitations":["Preview rendering requires a browser or headless rendering engine; adds latency and infrastructure complexity","Visual feedback is limited to screenshots or accessibility trees; no interactive design manipulation","Multi-turn iteration increases token usage and API costs","Browser automation (Playwright, Puppeteer) adds ~1-5 second latency per preview"],"requires":["Preview server or headless browser (Playwright, Puppeteer, or similar)","MCP client with support for streaming or callback responses","Component rendering environment (Node.js with React/Vue rendering)"],"input_types":["component code","preview configuration (viewport size, theme, props)","refinement requests"],"output_types":["component screenshots","accessibility tree","rendering errors or warnings","refined component code"],"categories":["tool-use-integration","image-visual"],"confidence":0.5,"matches":0,"success_rate":0}],"trust":{"score":25,"verified":false,"data_access_risk":"high","permissions":["MCP-compatible LLM client (Claude, or custom client with MCP support)","Node.js 16+ for running the MCP server","Understanding of MCP protocol and tool schema definition","Access to 21st.dev design system documentation or source","Formalized 21st.dev design token definitions (JSON, CSS variables, or design tokens format)","MCP server with JSON schema support for parameter validation","Design system documentation mapping token names to use cases","Template definitions for each supported framework","Framework-specific code generation rules (AST transformation or string templating)","Understanding of framework-specific idioms and best practices"],"failure_modes":["Limited to component types pre-defined in the 21st.dev design system — custom component archetypes require extending the MCP server","Requires MCP client support; not compatible with REST API-only LLM integrations","No real-time preview or visual feedback loop — output must be rendered separately","Design system updates require redeploying the MCP server; no hot-reload of design tokens","Token set must be manually curated and kept in sync with design system source of truth","No support for dynamic token generation or runtime theme switching","Constraint validation is schema-based only; semantic design rules (e.g., 'never use red on dark backgrounds') require custom logic","Requires design system to be formalized as structured data; informal or CSS-only systems need migration","Framework-specific features (e.g., React hooks, Vue composition API) require manual adaptation — transpilation is syntax-level only","State management patterns differ across frameworks; generated components may need custom hooks/stores","builder identity is not verified yet","no observed match outcomes yet"],"rank_breakdown":{"adoption":0.05,"quality":0.22,"ecosystem":0.39999999999999997,"match_graph":0.25,"freshness":0.52,"weights":{"adoption":0.25,"quality":0.25,"ecosystem":0.15,"match_graph":0.23,"freshness":0.12}},"observed_outcomes":{"matches":0,"success_rate":0,"avg_confidence":0,"top_intents":[],"last_matched_at":null},"maintenance":{"status":"active","updated_at":"2026-06-17T09:51:02.370Z","last_scraped_at":"2026-05-03T14:00:15.503Z","last_commit":null},"community":{"stars":null,"forks":null,"weekly_downloads":null,"model_downloads":null,"model_likes":null}},"distribution":{"claim_url":"https://unfragile.ai/submit?claim=21st-dev-magic","compare_url":"https://unfragile.ai/compare?artifact=21st-dev-magic"}},"signature":"gs8S7QCedkfdZkkhMpmHfe9+dpfyLU0GC9MoKS2zhQc4PcE4tFcDTffK+OiLvnyBz0JKwfsAIGYKyBhQO+ekCA==","signedAt":"2026-06-21T21:23:34.240Z","signedBy":"unfragile.ai","version":1},"_links":{"self":"https://unfragile.ai/api/v1/passport/21st-dev-magic","artifact":"https://unfragile.ai/21st-dev-magic","verify":"https://unfragile.ai/api/v1/verify?slug=21st-dev-magic","publicKey":"https://unfragile.ai/api/v1/trust-passport-public-key","spec":"https://unfragile.ai/trust","schema":"https://unfragile.ai/schema.json","docs":"https://unfragile.ai/docs"}}