{"passport":{"unfragile":{"@version":"1.0","version":"2026-05","artifact":{"id":"npm_npm-dapp-local-mcp","slug":"npm-dapp-local-mcp","name":"dapp-local-mcp","type":"mcp","url":"https://www.npmjs.com/package/dapp-local-mcp","page_url":"https://unfragile.ai/npm-dapp-local-mcp","categories":["mcp-servers"],"tags":["mcp","model-context-protocol","stdio"],"pricing":{"model":"open_source","free":true,"starting_price":null},"status":"active","verified":false},"capabilities":[{"id":"npm_npm-dapp-local-mcp__cap_0","uri":"capability://tool.use.integration.stdio.based.mcp.server.instantiation","name":"stdio-based mcp server instantiation","description":"Bootstraps a Model Context Protocol server using the @modelcontextprotocol/sdk with stdio transport, enabling bidirectional JSON-RPC communication between an MCP client (Claude, other LLM applications) and local tools/resources. The server implements the MCP specification's transport layer, handling message serialization, request routing, and response marshaling over standard input/output streams without requiring HTTP or WebSocket infrastructure.","intents":["I want to expose local tools and resources to Claude Desktop or other MCP clients without setting up a web server","I need to build a local MCP server that integrates with my existing Node.js application","I want to enable Claude to interact with my local development environment via MCP protocol"],"best_for":["developers building local-first AI integrations with Claude Desktop","teams creating private MCP servers for internal tool exposure","solo developers prototyping LLM agent architectures with local resource access"],"limitations":["stdio transport is single-process only — no horizontal scaling or multi-instance load balancing","no built-in authentication or encryption — relies on OS-level process isolation","requires explicit client configuration to connect; no auto-discovery mechanism","blocking I/O on stdio can cause latency under high message throughput"],"requires":["Node.js 16+ (for ES modules and async/await support)","@modelcontextprotocol/sdk package installed","MCP client application (Claude Desktop, custom client, or compatible tool)","understanding of MCP protocol specification and JSON-RPC message format"],"input_types":["JSON-RPC requests from MCP client","tool invocation payloads with parameters","resource requests with URIs"],"output_types":["JSON-RPC responses with tool results","resource content (text, structured data, binary)","error messages with MCP-compliant error codes"],"categories":["tool-use-integration","mcp-server"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"npm_npm-dapp-local-mcp__cap_1","uri":"capability://tool.use.integration.tool.definition.and.invocation.routing","name":"tool definition and invocation routing","description":"Registers callable tools with the MCP server by defining their schemas (name, description, input parameters) and attaching handler functions that execute when the MCP client requests tool invocation. The server routes incoming tool calls to the correct handler based on tool name, validates input parameters against the schema, and returns structured results back to the client. This pattern decouples tool definition from execution logic.","intents":["I want to expose a set of local functions as tools that Claude can call","I need to define tool schemas with typed parameters so Claude understands what arguments to pass","I want to handle tool execution errors gracefully and return meaningful error messages to the client"],"best_for":["developers building Claude integrations that need access to local APIs or system commands","teams creating domain-specific tool sets for specialized workflows","builders prototyping multi-step agent workflows with local tool dependencies"],"limitations":["tool execution is synchronous by default — long-running operations block the stdio message pump","no built-in timeout mechanism — runaway tool handlers can hang the entire server","parameter validation is schema-based only; no runtime type coercion or sanitization","tool results must be serializable to JSON; binary data requires base64 encoding"],"requires":["Node.js 16+","@modelcontextprotocol/sdk with tool registration API","tool handler functions (async or sync)","JSON-serializable return types from tool handlers"],"input_types":["tool schema definitions (name, description, input_schema)","tool invocation requests with parameters","handler function arguments matching schema"],"output_types":["tool result objects (content array with text/image blocks)","error responses with error codes and messages","structured JSON data from tool execution"],"categories":["tool-use-integration","automation-workflow"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"npm_npm-dapp-local-mcp__cap_2","uri":"capability://tool.use.integration.resource.exposure.and.content.serving","name":"resource exposure and content serving","description":"Exposes local files, directories, or dynamically-generated content as MCP resources with URI-based addressing, allowing MCP clients to read resource content without direct filesystem access. The server implements resource listing (enumerate available resources) and content retrieval (fetch resource by URI), supporting text, binary, and structured data formats. Resources are defined with metadata (name, description, MIME type) for client discovery.","intents":["I want Claude to read files from my local project without passing file paths as tool arguments","I need to expose a directory structure as browsable resources that Claude can explore","I want to serve dynamically-generated content (e.g., database query results) as resources without writing to disk"],"best_for":["developers building code analysis or documentation tools that need file access","teams exposing project artifacts (configs, schemas, logs) to Claude for analysis","builders creating knowledge-base integrations where resources are database records or API responses"],"limitations":["resource URIs are opaque to the client — no standard URI scheme or path convention across MCP servers","no built-in access control — all registered resources are readable by any MCP client connected to the server","large file serving is inefficient over stdio — no streaming or chunked transfer support","resource listing can be expensive if resources are dynamically generated or sourced from external APIs"],"requires":["Node.js 16+","@modelcontextprotocol/sdk with resource registration API","resource handler functions that return content or file paths","MIME type definitions for content type negotiation"],"input_types":["resource URI strings","resource metadata (name, description, MIME type)","file paths or content generators"],"output_types":["resource content (text, binary, JSON)","resource list with metadata","error responses for missing or inaccessible resources"],"categories":["tool-use-integration","memory-knowledge"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"npm_npm-dapp-local-mcp__cap_3","uri":"capability://text.generation.language.prompt.template.registration.and.retrieval","name":"prompt template registration and retrieval","description":"Registers reusable prompt templates with the MCP server that clients can discover and instantiate with custom arguments. Templates are defined with placeholders, descriptions, and optional argument schemas, enabling clients to request templates by name and receive filled-in prompts. This decouples prompt engineering from client code and allows server-side prompt management and versioning.","intents":["I want to define standard prompts on the server side that Claude can use consistently across multiple conversations","I need to version and update prompts without modifying client code","I want Claude to discover available prompt templates and choose the right one for a task"],"best_for":["teams managing shared prompt libraries across multiple Claude integrations","developers building domain-specific Claude applications with standardized workflows","organizations needing centralized prompt governance and A/B testing"],"limitations":["prompt templates are server-side only — clients cannot define or modify templates at runtime","no built-in templating engine — argument substitution must be implemented manually or via external libraries","no versioning or rollback mechanism — template updates affect all clients immediately","argument validation is optional — no enforcement of required arguments or type checking"],"requires":["Node.js 16+","@modelcontextprotocol/sdk with prompt registration API","template definitions with placeholders and metadata","optional: templating library (e.g., Handlebars, Nunjucks) for complex substitution"],"input_types":["prompt template definitions (name, description, arguments, template text)","prompt instantiation requests with argument values"],"output_types":["filled-in prompt text","prompt metadata and argument schemas","list of available templates"],"categories":["text-generation-language","memory-knowledge"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"npm_npm-dapp-local-mcp__cap_4","uri":"capability://safety.moderation.request.response.error.handling.and.protocol.compliance","name":"request/response error handling and protocol compliance","description":"Implements MCP protocol error handling by catching exceptions in tool handlers, resource retrievers, and prompt templates, then translating them into MCP-compliant error responses with appropriate error codes (e.g., INVALID_REQUEST, INTERNAL_ERROR, RESOURCE_NOT_FOUND). Errors are serialized as JSON-RPC error objects with descriptive messages, allowing clients to distinguish between client errors, server errors, and resource errors without parsing error text.","intents":["I want tool execution errors to be reported to Claude in a structured way so it can retry or handle them gracefully","I need to distinguish between different error types (missing resources, invalid parameters, server failures) so the client can respond appropriately","I want to avoid exposing sensitive error details (stack traces, internal paths) to the MCP client"],"best_for":["developers building production MCP servers that need robust error handling","teams integrating MCP with error monitoring and logging systems","builders creating resilient Claude integrations that handle tool failures gracefully"],"limitations":["error codes are limited to MCP spec — custom error types require mapping to standard codes","no built-in error recovery or retry logic — clients must implement retry strategies","stack traces are not transmitted to clients — debugging requires server-side logging","error messages are human-readable only — no structured error metadata for programmatic handling"],"requires":["Node.js 16+","@modelcontextprotocol/sdk with error handling utilities","try-catch blocks or Promise rejection handlers in tool/resource handlers","understanding of MCP error codes and JSON-RPC error format"],"input_types":["exceptions thrown in handler functions","validation errors from schema checking","resource not found or access denied errors"],"output_types":["JSON-RPC error objects with code and message","MCP-compliant error responses","structured error metadata"],"categories":["safety-moderation","tool-use-integration"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"npm_npm-dapp-local-mcp__cap_5","uri":"capability://tool.use.integration.client.capability.negotiation.and.feature.detection","name":"client capability negotiation and feature detection","description":"Implements MCP protocol initialization handshake where the server and client exchange capability declarations, allowing the server to detect which MCP features the client supports (tools, resources, prompts, sampling) and adapt behavior accordingly. The server can conditionally expose features based on client capabilities, preventing errors when clients don't support certain MCP features. This enables forward/backward compatibility across MCP versions.","intents":["I want my MCP server to work with different MCP client versions that support different feature sets","I need to detect whether the client supports tools, resources, or prompts before exposing them","I want to provide graceful degradation if the client doesn't support advanced MCP features"],"best_for":["developers building MCP servers that need to support multiple client versions","teams deploying MCP servers to diverse environments (Claude Desktop, custom clients, third-party tools)","builders creating extensible MCP servers that can adapt to client capabilities"],"limitations":["capability negotiation happens once at startup — no dynamic capability changes during session","no capability versioning — clients either support a feature or don't","limited to MCP spec capabilities — custom capabilities require out-of-band negotiation","no fallback mechanism if client and server have incompatible capability sets"],"requires":["Node.js 16+","@modelcontextprotocol/sdk with initialization protocol support","understanding of MCP capability declarations","client that implements MCP initialization handshake"],"input_types":["client capability declarations from initialization request","server capability declarations"],"output_types":["negotiated capability set","initialization response with server capabilities","feature availability flags for conditional logic"],"categories":["tool-use-integration","automation-workflow"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"npm_npm-dapp-local-mcp__cap_6","uri":"capability://automation.workflow.concurrent.request.handling.with.message.pump","name":"concurrent request handling with message pump","description":"Manages concurrent MCP requests using a message pump that reads JSON-RPC messages from stdin, routes them to appropriate handlers (tool calls, resource reads, prompt retrieval), and writes responses to stdout. The SDK abstracts the message pump implementation, handling buffering, message framing, and request/response correlation. Handlers can be async, allowing concurrent execution of multiple tool calls or resource retrievals without blocking the message pump.","intents":["I want my MCP server to handle multiple concurrent tool calls from Claude without blocking","I need to ensure that long-running tool handlers don't prevent other requests from being processed","I want the server to maintain responsiveness even when some handlers are slow"],"best_for":["developers building MCP servers that expose I/O-bound operations (API calls, database queries, file reads)","teams deploying MCP servers that need to handle multiple concurrent Claude conversations","builders creating high-throughput MCP integrations with many tool calls"],"limitations":["stdio transport is single-threaded — CPU-bound operations block the message pump","no request prioritization — all requests are processed in FIFO order","no built-in request timeout — long-running handlers can hang the server","message pump latency is proportional to handler execution time — no request queuing or backpressure handling"],"requires":["Node.js 16+ with async/await support","@modelcontextprotocol/sdk with async handler support","async handler functions for I/O-bound operations","understanding of Node.js event loop and async concurrency"],"input_types":["JSON-RPC request messages from stdin","concurrent tool invocation requests","resource read requests"],"output_types":["JSON-RPC response messages to stdout","tool results from concurrent handlers","resource content from concurrent retrievers"],"categories":["automation-workflow","tool-use-integration"],"confidence":0.5,"matches":0,"success_rate":0}],"trust":{"score":26,"verified":false,"data_access_risk":"high","permissions":["Node.js 16+ (for ES modules and async/await support)","@modelcontextprotocol/sdk package installed","MCP client application (Claude Desktop, custom client, or compatible tool)","understanding of MCP protocol specification and JSON-RPC message format","Node.js 16+","@modelcontextprotocol/sdk with tool registration API","tool handler functions (async or sync)","JSON-serializable return types from tool handlers","@modelcontextprotocol/sdk with resource registration API","resource handler functions that return content or file paths"],"failure_modes":["stdio transport is single-process only — no horizontal scaling or multi-instance load balancing","no built-in authentication or encryption — relies on OS-level process isolation","requires explicit client configuration to connect; no auto-discovery mechanism","blocking I/O on stdio can cause latency under high message throughput","tool execution is synchronous by default — long-running operations block the stdio message pump","no built-in timeout mechanism — runaway tool handlers can hang the entire server","parameter validation is schema-based only; no runtime type coercion or sanitization","tool results must be serializable to JSON; binary data requires base64 encoding","resource URIs are opaque to the client — no standard URI scheme or path convention across MCP servers","no built-in access control — all registered resources are readable by any MCP client connected to the server","builder identity is not verified yet","no observed match outcomes yet"],"rank_breakdown":{"adoption":0.05,"quality":0.24,"ecosystem":0.38999999999999996,"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":"2026-04-22T08:09:48.710Z","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-dapp-local-mcp","compare_url":"https://unfragile.ai/compare?artifact=npm-dapp-local-mcp"}},"signature":"xy+I153qPM1L0DdXhoO4gZnVgzHxw60kZz6yYkw84mX4zcvF8si8XJftNs756VuqpWr76QqRuDa0L4D3k1AfDQ==","signedAt":"2026-06-21T03:00:26.549Z","signedBy":"unfragile.ai","version":1},"_links":{"self":"https://unfragile.ai/api/v1/passport/npm-dapp-local-mcp","artifact":"https://unfragile.ai/npm-dapp-local-mcp","verify":"https://unfragile.ai/api/v1/verify?slug=npm-dapp-local-mcp","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"}}