magic-mcp
MCP ServerFreeIt's like v0 but in your Cursor/WindSurf/Cline. 21st dev Magic MCP server for working with your frontend like Magic
Capabilities9 decomposed
natural-language-to-react-component-generation
Medium confidenceGenerates production-ready React/TypeScript UI components from natural language descriptions by routing requests through the CreateUiTool to the 21st.dev Magic API, which synthesizes component code and writes output files directly to the project filesystem. Uses a callback server (port 9221+) to handle asynchronous browser-based user interactions during generation, enabling iterative refinement without blocking the IDE.
Implements bidirectional IDE-to-API communication via MCP protocol with a dedicated callback server for handling asynchronous browser interactions, enabling real-time component generation with user feedback loops without leaving the IDE. Uses stdio transport for seamless IDE integration rather than HTTP polling.
Faster than v0 for IDE workflows because it operates as a native MCP server in Cursor/Windsurf rather than requiring browser context switching, and directly writes files to the project instead of requiring manual copy-paste.
ai-assisted-component-refinement
Medium confidenceRefines existing React/TypeScript components through the RefineUiTool by sending current component code to the 21st.dev Magic API with refinement instructions, receiving improved code that addresses styling, accessibility, performance, or feature requests. Modifies existing component files in-place with API-generated improvements while maintaining component structure and imports.
Operates as an in-place component modifier through MCP rather than a separate linting or formatting tool, maintaining full component context and semantics while applying AI-driven improvements. Integrates directly with IDE file system for immediate feedback.
More context-aware than ESLint or Prettier because it understands component intent and can refactor logic, not just formatting; faster than manual refactoring because it suggests improvements without requiring developer to articulate every change.
component-library-search-and-fetch
Medium confidenceRetrieves pre-built React/TypeScript components from the 21st.dev component library through the FetchUiTool by querying the 21st.dev API with component names or descriptions, returning JSON-structured component data including code, props, and usage examples. Enables developers to discover and reuse existing components rather than generating new ones.
Provides MCP-native search and retrieval of a curated component library through structured API queries, returning rich metadata that includes not just code but props, examples, and design context. Operates as a discovery tool integrated into the IDE workflow.
More discoverable than browsing npm registry because results are curated and pre-vetted by 21st.dev; faster than searching GitHub because queries are optimized for component metadata rather than full-text search.
company-logo-search-and-retrieval
Medium confidenceSearches and retrieves company logos in multiple formats (SVG, JSX, TSX) through the LogoSearchTool by querying the SVGL API (api.svgl.app), enabling developers to quickly find and integrate brand logos into components. Returns logo data in multiple output formats suitable for different use cases (static SVG, React JSX components, TypeScript components).
Integrates SVGL API through MCP protocol with format conversion to JSX/TSX, allowing developers to search logos and receive them as ready-to-use React components without leaving the IDE. Provides multi-format output (SVG, JSX, TSX) from a single query.
Faster than manually searching SVGL website and converting logos because it returns React-ready components directly; more integrated than copying SVGs because formats are optimized for different component use cases.
mcp-protocol-stdio-transport
Medium confidenceImplements MCP (Model Context Protocol) server communication using stdio transport, enabling the Magic MCP server to integrate seamlessly with IDE clients (Cursor, Windsurf, Cline) through stdin/stdout pipes. The McpServer instance handles request-response lifecycle, tool registration, and protocol compliance without requiring HTTP endpoints or external networking infrastructure.
Uses stdio-based MCP transport instead of HTTP, eliminating need for port management, external networking, or authentication infrastructure. McpServer instance manages full protocol lifecycle including signal handlers for graceful shutdown and error recovery.
More reliable than HTTP-based tool servers because stdio is guaranteed by OS process model; lower latency than REST APIs because no serialization overhead; simpler deployment than microservices because no port conflicts or network configuration needed.
async-callback-server-for-browser-interactions
Medium confidenceManages asynchronous user interactions during component generation through a dedicated callback server (running on port 9221+) that handles browser-based UI flows without blocking the IDE. When CreateUiTool initiates generation requiring user input (e.g., design choices, refinements), the callback server receives responses and feeds them back to the generation pipeline, enabling interactive workflows.
Decouples IDE from browser-based user interactions through a dedicated callback server, allowing asynchronous workflows without blocking the IDE's MCP communication. Enables interactive component generation while maintaining IDE responsiveness.
More responsive than blocking on user input because callback server handles async operations independently; better UX than modal dialogs because users can interact with browser UI while IDE remains responsive; more flexible than synchronous APIs because supports multi-step workflows.
http-client-with-api-abstraction
Medium confidenceProvides a unified HTTP client (twentyFirstClient) that abstracts communication with multiple external APIs (21st.dev Magic API and SVGL API) through a single interface. Handles request serialization, response parsing, error handling, and retry logic, enabling tools to invoke external services without managing HTTP details directly.
Centralizes HTTP communication for multiple external APIs (21st.dev Magic, SVGL) through a single client interface, abstracting API-specific details and enabling consistent error handling and retry logic across all tools.
More maintainable than scattered HTTP calls because API changes require updates in one place; more reliable than direct fetch calls because includes built-in error handling and retry logic; easier to test because HTTP layer is mocked at client level.
tool-registration-and-routing
Medium confidenceRegisters four specialized tools (CreateUiTool, RefineUiTool, FetchUiTool, LogoSearchTool) with the MCP server, enabling the IDE to discover available capabilities and route tool invocations to appropriate handlers. Each tool extends the MCP tool interface with specific input schemas, descriptions, and execution logic, allowing the IDE to validate inputs before execution.
Implements tool registration as MCP protocol-compliant handlers with input schema validation, enabling IDE-side input validation and tool discovery without requiring separate documentation or configuration files.
More discoverable than function calling APIs because tools are registered with full metadata; more type-safe than string-based routing because input schemas are validated before execution; more maintainable than hardcoded tool lists because registration is declarative.
project-filesystem-integration-for-component-output
Medium confidenceWrites generated and refined components directly to the project filesystem through the CreateUiTool and RefineUiTool, integrating generated code into the developer's project structure without requiring manual file creation or copy-paste. Handles file path resolution, directory creation, and file writing with proper error handling.
Directly integrates generated components into the project filesystem as part of the generation pipeline, eliminating the manual copy-paste step and enabling components to be immediately available in the IDE's file tree and import system.
More seamless than clipboard-based tools because components appear in project immediately; faster than manual file creation because paths are resolved automatically; better integrated than separate generation tools because output is directly usable.
Capabilities are decomposed by AI analysis. Each maps to specific user intents and improves with match feedback.
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Best For
- ✓frontend developers using Cursor, Windsurf, or Cline who want rapid component prototyping
- ✓teams building design systems and needing consistent component generation
- ✓developers migrating from v0 or similar tools who want IDE-native generation
- ✓frontend developers iterating on existing components within their IDE
- ✓teams performing code quality improvements across component libraries
- ✓developers who want AI-assisted refactoring without leaving their editor
- ✓developers building with 21st.dev design system who want to reuse library components
- ✓teams standardizing on a component library and needing quick access to component specs
Known Limitations
- ⚠Requires active internet connection to 21st.dev Magic API — no offline generation capability
- ⚠Component generation quality depends on API model capabilities and natural language description clarity
- ⚠Callback server adds ~200-500ms latency for async operations; blocks on file I/O writes
- ⚠No built-in version control integration — overwrites existing files without conflict detection
- ⚠Limited to React/TypeScript output; no support for Vue, Svelte, or other frameworks
- ⚠Refinement quality depends on clarity of refinement instructions and API model understanding of context
Requirements
Input / Output
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Repository Details
Last commit: Feb 17, 2026
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It's like v0 but in your Cursor/WindSurf/Cline. 21st dev Magic MCP server for working with your frontend like Magic
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