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Supports streaming large resources via chunked responses, automatic MIME type detection, and content-type negotiation. Handlers can return text, binary, or structured data with automatic serialization based on declared MIME types.","intents":["Expose file system contents to Claude without loading entire files into context","Stream database query results or API responses as resources that agents can reference","Provide dynamic content (logs, metrics, generated reports) that updates between agent requests"],"best_for":["Developers building knowledge-base integrations where content is too large for context windows","Teams exposing file systems or databases to AI agents via MCP","Applications requiring dynamic resource generation (logs, metrics, reports)"],"limitations":["Streaming adds latency for large resources; no built-in caching or compression","MIME type detection is heuristic-based and may fail for custom formats","No built-in access control — resource visibility depends on URI filtering at the server level","Binary resources must be base64-encoded for JSON transport, increasing payload size by ~33%"],"requires":["Node.js 16+","File system or database access for resource providers","MIME type library (e.g., mime-types) for content-type detection"],"input_types":["Resource URIs (string format)","Optional query parameters or filters"],"output_types":["Text content (UTF-8)","Binary content (base64-encoded)","Structured data (JSON)"],"categories":["memory-knowledge","tool-use-integration"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"npm_npm-mcp-usemodelcontextprotocol-sdk__cap_3","uri":"capability://text.generation.language.prompt.template.registry.with.variable.substitution.and.multi.turn.conversation.support","name":"prompt template registry with variable substitution and multi-turn conversation support","description":"Provides a registry for storing reusable prompt templates with named placeholders that can be filled at runtime. Supports multi-turn conversation templates with role-based message sequencing (system, user, assistant). Templates are versioned and can reference other templates, enabling composition of complex prompts from simpler building blocks.","intents":["Define system prompts once and reuse them across multiple tool servers or agents","Create conversation templates that guide multi-turn interactions with consistent formatting","Compose complex prompts from smaller, reusable template fragments"],"best_for":["Teams managing prompt engineering across multiple agents or applications","Developers building conversational AI systems with consistent prompt structure","Organizations requiring prompt versioning and A/B testing capabilities"],"limitations":["No built-in prompt optimization or cost estimation","Variable substitution is simple string replacement — no conditional logic or loops","Template composition is static; dynamic prompt generation requires custom code","No built-in storage or versioning — persistence depends on external systems"],"requires":["Node.js 16+","Optional: external storage system (database, file system) for template persistence"],"input_types":["Template definitions (string with placeholders)","Variable bindings (key-value objects)"],"output_types":["Rendered prompt strings","Message arrays (for multi-turn conversations)"],"categories":["text-generation-language","memory-knowledge"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"npm_npm-mcp-usemodelcontextprotocol-sdk__cap_4","uri":"capability://tool.use.integration.client.side.mcp.connection.management.with.automatic.reconnection.and.request.multiplexing","name":"client-side mcp connection management with automatic reconnection and request multiplexing","description":"Implements a client-side MCP connection handler that manages the lifecycle of connections to MCP servers (stdio, WebSocket, SSE). Automatically handles reconnection with exponential backoff, multiplexes concurrent requests over a single connection, and maintains request/response correlation using JSON-RPC message IDs. Provides a Promise-based API for invoking remote tools and resources.","intents":["Connect to multiple MCP servers from a single agent or application","Automatically recover from transient network failures without losing state","Invoke remote tools and access resources with a simple async/await interface"],"best_for":["Developers building MCP clients (e.g., custom Claude integrations, agent frameworks)","Teams deploying MCP servers in production and requiring resilient client connections","Applications managing connections to multiple tool servers simultaneously"],"limitations":["Reconnection logic adds latency during network failures (exponential backoff up to ~30s)","Request multiplexing is limited by transport throughput; high-frequency requests may queue","No built-in request deduplication or caching — duplicate requests are sent to the server","Stdio transport requires process spawning; WebSocket requires explicit server URL configuration"],"requires":["Node.js 16+","MCP server endpoint (stdio process, WebSocket URL, or SSE endpoint)","Optional: TLS certificates for secure WebSocket connections"],"input_types":["Server connection configuration (transport type, endpoint)","Tool invocation requests (tool name, arguments)"],"output_types":["Tool execution results (JSON)","Resource content (text, binary, or structured data)","Error objects with MCP error codes"],"categories":["tool-use-integration","automation-workflow"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"npm_npm-mcp-usemodelcontextprotocol-sdk__cap_5","uri":"capability://tool.use.integration.capability.advertisement.and.discovery.with.version.negotiation","name":"capability advertisement and discovery with version negotiation","description":"Implements MCP protocol capability negotiation where servers advertise supported features (tools, resources, prompts) and clients discover available capabilities. Includes version negotiation to ensure client and server compatibility, with fallback mechanisms for older protocol versions. Capabilities are advertised as structured metadata (schemas, descriptions, URIs) that clients can inspect before invoking.","intents":["Discover what tools and resources a server provides before connecting","Ensure protocol compatibility between client and server versions","Dynamically adapt client behavior based on server capabilities"],"best_for":["Developers building flexible MCP clients that adapt to different server capabilities","Teams deploying MCP servers with varying feature sets and requiring version compatibility","Applications requiring dynamic capability discovery at runtime"],"limitations":["Capability advertisement is static — no dynamic capability changes after connection","Version negotiation is binary (compatible or not); no partial compatibility modes","No built-in capability versioning — breaking changes require protocol version bumps","Capability metadata is descriptive only; no runtime validation that servers implement advertised capabilities"],"requires":["Node.js 16+","MCP server or client implementation"],"input_types":["Protocol version number","Capability request messages"],"output_types":["Capability advertisement objects (tools, resources, prompts)","Protocol version confirmation"],"categories":["tool-use-integration","automation-workflow"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"npm_npm-mcp-usemodelcontextprotocol-sdk__cap_6","uri":"capability://safety.moderation.error.handling.and.protocol.compliant.error.serialization.with.mcp.error.codes","name":"error handling and protocol-compliant error serialization with mcp error codes","description":"Implements comprehensive error handling that maps application errors to MCP-compliant error codes (InvalidRequest, MethodNotFound, InvalidParams, InternalError, ServerError). Errors are serialized as JSON-RPC 2.0 error objects with detailed messages and optional error data. Includes error context preservation (stack traces, original error objects) for debugging while sanitizing sensitive information in client responses.","intents":["Return structured errors to MCP clients with appropriate error codes","Preserve error context for debugging without leaking sensitive information","Ensure error responses comply with JSON-RPC 2.0 and MCP specifications"],"best_for":["Developers building production MCP servers requiring robust error handling","Teams debugging MCP integration issues and needing detailed error context","Applications requiring compliance with MCP error specifications"],"limitations":["Error sanitization is manual — developers must explicitly mark sensitive fields","Stack traces are included in development but must be disabled in production","No built-in error logging or monitoring — requires external logging infrastructure","Error codes are limited to JSON-RPC 2.0 standard codes; custom error types require error data field"],"requires":["Node.js 16+","Optional: external logging service for error tracking"],"input_types":["JavaScript Error objects","Custom error objects with code and message"],"output_types":["JSON-RPC 2.0 error objects","MCP error responses"],"categories":["safety-moderation","automation-workflow"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"npm_npm-mcp-usemodelcontextprotocol-sdk__cap_7","uri":"capability://code.generation.editing.typescript.type.generation.from.mcp.schemas.with.strict.type.safety","name":"typescript type generation from mcp schemas with strict type safety","description":"Generates TypeScript interfaces and types from MCP tool schemas, resource definitions, and prompt templates. Includes strict type checking for tool arguments, resource URIs, and template variables. Generated types are exported as .d.ts files or inline type definitions, enabling IDE autocomplete and compile-time type validation in handler implementations.","intents":["Generate TypeScript types from tool schemas to ensure type-safe handler implementations","Enable IDE autocomplete for tool arguments and resource URIs","Catch type errors at compile-time rather than runtime"],"best_for":["TypeScript developers building MCP servers with strict type safety requirements","Teams using TypeScript for both schema definition and handler implementation","Projects requiring compile-time validation of tool arguments and resource access"],"limitations":["Type generation requires build-time code generation or manual type definitions","Complex JSON Schema features (conditional schemas, custom formats) may not generate correct types","Generated types are static; dynamic schema changes require regeneration","No support for generic types or advanced TypeScript features in generated types"],"requires":["TypeScript 4.5+","Node.js 16+","Build tool integration (webpack, esbuild, tsc) for type generation"],"input_types":["MCP schema definitions (JSON Schema format)"],"output_types":["TypeScript interface definitions (.d.ts)","Inline type definitions"],"categories":["code-generation-editing","tool-use-integration"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"npm_npm-mcp-usemodelcontextprotocol-sdk__cap_8","uri":"capability://automation.workflow.middleware.and.hook.system.for.request.response.interception.and.transformation","name":"middleware and hook system for request/response interception and transformation","description":"Provides a middleware/hook system that allows intercepting and transforming requests and responses at multiple points in the MCP message pipeline (before/after tool invocation, before/after resource access, before/after error handling). Middleware is executed in order and can modify payloads, add logging, implement caching, or enforce access control. Hooks are async-friendly and support both server-side and client-side middleware.","intents":["Add logging and monitoring to tool invocations and resource access","Implement access control or rate limiting for specific tools or resources","Cache tool results or resource content to reduce latency"],"best_for":["Developers building production MCP servers requiring observability and access control","Teams implementing caching or performance optimization for tool servers","Applications requiring request/response transformation or enrichment"],"limitations":["Middleware execution adds latency (~5-20ms per middleware depending on complexity)","Middleware order is important; incorrect ordering can cause unexpected behavior","No built-in middleware for common tasks (logging, caching, rate limiting) — must be implemented manually","Middleware state is not shared between requests; requires external storage for cross-request state"],"requires":["Node.js 16+","Optional: external storage for middleware state (cache, rate limit counters)"],"input_types":["MCP request objects","Tool invocation payloads"],"output_types":["Transformed request/response objects","Logging/monitoring data"],"categories":["automation-workflow","safety-moderation"],"confidence":0.5,"matches":0,"success_rate":0}],"trust":{"score":27,"verified":false,"data_access_risk":"high","permissions":["Node.js 16+ (ES2020+ async/await support)","TypeScript 4.5+ or JavaScript ES2020+","@types/node for type definitions","Node.js 16+","JSON Schema validator library (typically ajv or similar)","TypeScript 4.5+ for type generation (optional but recommended)","File system or database access for resource providers","MIME type library (e.g., mime-types) for content-type detection","Optional: external storage system (database, file system) for template persistence","MCP server endpoint (stdio process, WebSocket URL, or SSE endpoint)"],"failure_modes":["TypeScript/JavaScript only — no native Python, Go, or Rust bindings","Stdio transport requires process management; WebSocket transport adds network latency and requires explicit server setup","No built-in authentication — security depends on transport layer (e.g., TLS for WebSocket)","Single-threaded event loop limits concurrent request handling without worker threads","Schema validation adds ~10-50ms per tool invocation depending on schema complexity","Limited to JSON Schema subset — advanced formats (custom regex, conditional schemas) may not transpile correctly","Type generation requires build-time code generation or manual type definitions","No support for streaming tool results or long-running tool executions","Streaming adds latency for large resources; no built-in caching or compression","MIME type detection is heuristic-based and may fail for custom formats","builder identity is not verified yet","no observed match outcomes yet"],"rank_breakdown":{"adoption":0.05,"quality":0.28,"ecosystem":0.36,"match_graph":0.25,"freshness":0.6,"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":"2026-05-24T12:16:23.903Z","last_scraped_at":"2026-05-03T14:23:41.787Z","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=npm-mcp-usemodelcontextprotocol-sdk","compare_url":"https://unfragile.ai/compare?artifact=npm-mcp-usemodelcontextprotocol-sdk"}},"signature":"3Fad9zwUUcPjax1e0LSpfA37Wjum1UcfxlAa16v4AdD5zD7jXPz185A+l1UDOss5k8lw61uRR8krJGrI+UqTBg==","signedAt":"2026-06-20T19:45:27.145Z","signedBy":"unfragile.ai","version":1},"_links":{"self":"https://unfragile.ai/api/v1/passport/npm-mcp-usemodelcontextprotocol-sdk","artifact":"https://unfragile.ai/npm-mcp-usemodelcontextprotocol-sdk","verify":"https://unfragile.ai/api/v1/verify?slug=npm-mcp-usemodelcontextprotocol-sdk","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"}}