@modelcontextprotocol/server-basic-react

Bootstraps a Model Context Protocol server that uses React as the templating and component composition layer for generating dynamic tool definitions and resource schemas. The server implements the MCP protocol specification, handling client connections and exposing tools/resources as React-rendered JSON structures rather than static configurations, enabling component-based abstraction of server capabilities.

Implements a pattern where individual MCP tools are defined as React components that render to tool schema objects (name, description, input schema). Each tool component encapsulates its schema definition, input validation rules, and metadata, allowing tools to be composed, extended, and reused through React's component composition patterns (props, children, higher-order components) rather than flat configuration objects.

Generates MCP resource manifests (lists of available resources with URIs, types, and descriptions) by rendering React components to JSON structures. Resources are defined as components that describe what data/capabilities the server exposes, with the manifest dynamically built from the component tree, enabling resources to be conditionally included, parameterized, or composed based on configuration or runtime state.

Implements the MCP protocol message loop (JSON-RPC 2.0) that receives client requests, routes them to appropriate tool/resource handlers, and returns responses. The server parses incoming MCP messages, validates them against the protocol specification, dispatches to React-rendered tool/resource handlers, and serializes responses back to JSON-RPC format, with error handling for malformed requests and handler failures.

Executes tool invocations by binding client-provided parameters to tool handler functions, with parameter validation against the tool's input schema. When a client calls a tool, the server matches the request to the corresponding React-rendered tool component, validates input parameters against the schema, invokes the handler function with bound parameters, and returns the result or error, with support for async handlers and error propagation.

Retrieves and serves resource content (files, API responses, database records) when clients request resources by URI. The server matches the requested resource URI to a React-rendered resource component, invokes the resource handler to fetch or generate content, and returns the content with appropriate MIME type and encoding. Supports both synchronous content return and streaming for large resources, with proper error handling for missing or inaccessible resources.

Configures server behavior (port, host, logging level, feature flags) through environment variables and configuration objects, with conditional exposure of tools and resources based on configuration. The server reads configuration at startup, passes it to React components via context or props, enabling tools/resources to be conditionally rendered based on environment (development vs. production), feature flags, or API keys, allowing a single server codebase to support multiple deployment scenarios.