{"passport":{"unfragile":{"@version":"1.0","version":"2026-05","artifact":{"id":"awesome-ruby-mcp-sdk","slug":"ruby-mcp-sdk","name":"Ruby MCP SDK","type":"mcp","url":"https://github.com/modelcontextprotocol/ruby-sdk","page_url":"https://unfragile.ai/ruby-mcp-sdk","categories":["mcp-servers"],"tags":[],"pricing":{"model":"open_source","free":true,"starting_price":null},"status":"active","verified":false},"capabilities":[{"id":"awesome-ruby-mcp-sdk__cap_0","uri":"capability://tool.use.integration.json.rpc.protocol.request.routing.and.dispatch","name":"json-rpc protocol request routing and dispatch","description":"The MCP::Server class implements a JSON-RPC 2.0 request handler that routes incoming protocol method calls to appropriate handler methods based on the MCP specification. It parses JSON-RPC requests, validates method names against the protocol spec, dispatches to corresponding handler implementations, and returns properly formatted JSON-RPC responses or error objects. The server maintains an internal method registry that maps protocol methods (e.g., 'tools/list', 'resources/read') to handler implementations.","intents":["I need to accept JSON-RPC requests from AI clients and route them to the correct handler","I want to implement the full MCP protocol specification without manually parsing JSON-RPC","I need to handle protocol versioning and method validation automatically"],"best_for":["Ruby developers building MCP-compliant servers","Teams integrating LLMs with Ruby backends","Developers who want protocol compliance without boilerplate"],"limitations":["Synchronous request handling only — no built-in async/await support for long-running operations","Request routing is method-name based — no middleware or interceptor pattern for cross-cutting concerns","Error responses follow JSON-RPC 2.0 spec but custom error codes require manual implementation"],"requires":["Ruby 2.7+","JSON library for serialization","Transport layer implementation (HTTP or stdio)"],"input_types":["JSON-RPC request objects","Protocol method names","Request parameters as JSON"],"output_types":["JSON-RPC response objects","JSON-RPC error objects","Protocol-compliant result payloads"],"categories":["tool-use-integration","protocol-implementation"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"awesome-ruby-mcp-sdk__cap_1","uri":"capability://tool.use.integration.tool.registration.and.schema.based.invocation","name":"tool registration and schema-based invocation","description":"The SDK provides a ModelContextProtocol::Tool class that allows developers to register callable functions with JSON Schema input definitions. Tools are registered on the server instance, and when an AI client requests tool execution, the server validates the input against the schema, invokes the tool's implementation block, and returns the result. The tool registry maintains metadata (name, description, input schema) that is exposed via the 'tools/list' protocol method, enabling AI clients to discover and understand available tools.","intents":["I want to expose Ruby functions to AI models with strict input validation","I need to define tool schemas that AI clients can discover and understand","I want to execute tools safely with automatic schema validation before invocation"],"best_for":["Developers building AI agent backends in Ruby","Teams creating tool-use integrations between LLMs and Ruby services","Builders who need schema-driven function invocation"],"limitations":["Tool implementations are synchronous — no native support for async/await or background job queues","Schema validation is JSON Schema only — no custom validation logic hooks","Tool results must be serializable to JSON — complex Ruby objects require manual conversion","No built-in rate limiting, caching, or tool execution monitoring"],"requires":["Ruby 2.7+","JSON Schema validation library","Tool implementation as a Ruby Proc or lambda"],"input_types":["Tool name (string)","Tool description (string)","Input schema (JSON Schema object)","Tool implementation (Ruby callable)"],"output_types":["Tool execution result (JSON-serializable)","Tool metadata (name, description, schema)","Tool list response (array of tool definitions)"],"categories":["tool-use-integration","automation-workflow"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"awesome-ruby-mcp-sdk__cap_2","uri":"capability://text.generation.language.prompt.template.definition.and.argument.substitution","name":"prompt template definition and argument substitution","description":"The ModelContextProtocol::Prompt class enables developers to define reusable prompt templates with named arguments and structured messaging. Prompts are registered on the server and exposed via the 'prompts/list' protocol method. When an AI client requests a prompt, the server substitutes provided arguments into the template and returns the rendered prompt with proper message structure. The prompt system supports multiple message types and allows templates to define which arguments are required vs optional.","intents":["I want to define reusable prompt templates that AI clients can discover and use","I need to structure prompts with arguments that clients can customize at runtime","I want to expose domain-specific prompt patterns to AI models without hardcoding them"],"best_for":["Teams building AI applications with domain-specific prompt patterns","Developers who want to centralize prompt management in their Ruby backend","Builders creating multi-tenant AI systems with customizable prompts"],"limitations":["Prompt templates use simple string substitution — no conditional logic or loops within templates","No built-in versioning or A/B testing for prompts","Argument validation is minimal — no type checking or complex validation rules","No caching of rendered prompts — each request re-renders the template"],"requires":["Ruby 2.7+","Prompt template definition as a string with argument placeholders","Argument definitions (name, description, required flag)"],"input_types":["Prompt name (string)","Prompt description (string)","Template string with placeholders","Argument definitions (array of argument objects)"],"output_types":["Rendered prompt text (string)","Structured message array (with role and content)","Prompt metadata (name, description, arguments)"],"categories":["text-generation-language","memory-knowledge"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"awesome-ruby-mcp-sdk__cap_3","uri":"capability://memory.knowledge.resource.uri.based.content.access.and.streaming","name":"resource uri-based content access and streaming","description":"The ModelContextProtocol::Resource class provides a mechanism to register and serve content via URI-based access. Resources are registered with a URI pattern and implementation, and when an AI client requests a resource via the 'resources/read' protocol method, the server retrieves and returns the content. The resource system supports multiple content types (text, images, binary data) and can stream large resources. Resources are discoverable via the 'resources/list' protocol method, exposing their URI patterns and MIME types to clients.","intents":["I want to expose files, documents, or data to AI models via a standardized URI interface","I need to serve different content types (text, images, binary) through a single resource mechanism","I want AI clients to discover available resources and their content types before accessing them"],"best_for":["Developers building knowledge bases or document retrieval systems for AI","Teams integrating file systems or databases with AI models","Builders creating RAG (Retrieval-Augmented Generation) backends in Ruby"],"limitations":["Resource access is synchronous — no built-in streaming for very large files","No built-in access control or authentication per resource","URI patterns are simple string matching — no regex or glob pattern support","Resource content must fit in memory — no pagination or chunking support","No caching layer — each request re-fetches the resource"],"requires":["Ruby 2.7+","Resource implementation as a Ruby callable returning content","URI pattern definition (string)","MIME type specification"],"input_types":["Resource URI (string)","Resource name (string)","Resource description (string)","MIME type (string)"],"output_types":["Resource content (text, binary, or image data)","Resource metadata (URI, name, description, MIME type)","Resource list (array of available resources)"],"categories":["memory-knowledge","search-retrieval"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"awesome-ruby-mcp-sdk__cap_4","uri":"capability://tool.use.integration.multi.transport.protocol.support.http.and.stdio","name":"multi-transport protocol support (http and stdio)","description":"The transport layer abstracts communication mechanisms, supporting both HTTP and stdio transports. The SDK provides transport implementations that handle the protocol-specific details of receiving JSON-RPC requests and sending responses. HTTP transport integrates with web frameworks, while stdio transport enables command-line tool integration. The server is transport-agnostic — the same server implementation works with any transport backend. Transport selection is configured at initialization time.","intents":["I want to run an MCP server over HTTP for web-based AI integrations","I need to expose an MCP server via stdio for command-line tool integration","I want to switch between transports without changing my server implementation"],"best_for":["Developers building both web and CLI-based AI integrations","Teams deploying MCP servers in diverse environments (cloud, local, containerized)","Builders who want transport flexibility without code duplication"],"limitations":["HTTP transport requires a web framework integration — no built-in HTTP server","Stdio transport is blocking — no concurrent request handling","No WebSocket support — HTTP transport is request-response only","Transport configuration is static — cannot switch transports at runtime","No built-in load balancing or connection pooling across transports"],"requires":["Ruby 2.7+","For HTTP: web framework (Rails, Sinatra, etc.) or HTTP server library","For stdio: standard input/output streams","JSON serialization library"],"input_types":["Transport type selection (HTTP or stdio)","Transport configuration (port, host, etc.)","JSON-RPC request stream"],"output_types":["JSON-RPC response stream","HTTP responses (for HTTP transport)","Stdout stream (for stdio transport)"],"categories":["tool-use-integration","automation-workflow"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"awesome-ruby-mcp-sdk__cap_5","uri":"capability://automation.workflow.notification.broadcasting.to.connected.clients","name":"notification broadcasting to connected clients","description":"The SDK supports server-initiated notifications that can be sent to connected clients via the 'notifications' protocol mechanism. The server maintains a list of subscribed clients and can broadcast notifications (e.g., resource updates, tool availability changes) to all or specific clients. Notifications are sent asynchronously and do not require a corresponding client request. The notification system uses the JSON-RPC notification format (no response expected).","intents":["I want to push updates to AI clients when resources or tools change","I need to notify clients of server state changes without waiting for polling","I want to implement real-time updates for dynamic tool or resource availability"],"best_for":["Developers building dynamic AI systems with changing tools or resources","Teams implementing real-time updates in AI applications","Builders creating event-driven MCP server architectures"],"limitations":["Notifications are fire-and-forget — no delivery guarantees or acknowledgment","No built-in filtering or subscription management — broadcasts go to all clients","Notification ordering is not guaranteed across multiple servers","No persistence — notifications are lost if clients are disconnected","Stdio transport does not support bidirectional notifications"],"requires":["Ruby 2.7+","Connected client tracking mechanism","JSON-RPC notification format support"],"input_types":["Notification method name (string)","Notification parameters (JSON object)"],"output_types":["JSON-RPC notification messages","Broadcast to connected clients"],"categories":["automation-workflow","tool-use-integration"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"awesome-ruby-mcp-sdk__cap_6","uri":"capability://safety.moderation.configuration.and.instrumentation.for.error.handling","name":"configuration and instrumentation for error handling","description":"The SDK provides configuration options for exception reporting, instrumentation hooks, and protocol versioning. Developers can configure how the server handles errors (logging, reporting, custom handlers), enable instrumentation for monitoring request/response metrics, and specify protocol version compatibility. The configuration system uses a block-based DSL for setting options at initialization time. Error handling includes automatic JSON-RPC error response generation with proper error codes and messages.","intents":["I want to configure error handling and logging for my MCP server","I need to instrument my server to monitor request metrics and performance","I want to ensure protocol version compatibility with clients"],"best_for":["Developers building production MCP servers with monitoring requirements","Teams implementing observability and error tracking in AI backends","Builders who need fine-grained control over server behavior"],"limitations":["Instrumentation hooks are basic — no built-in metrics collection or aggregation","Error handling is synchronous — no async error reporting","Configuration is static — cannot change settings at runtime","No built-in integration with popular monitoring tools (Datadog, New Relic, etc.)","Protocol version negotiation is limited — no version fallback mechanism"],"requires":["Ruby 2.7+","Configuration block at server initialization","Optional: external logging or monitoring library"],"input_types":["Configuration options (hash or block)","Error objects","Request/response objects for instrumentation"],"output_types":["Configured server instance","Instrumentation events","Error logs or reports"],"categories":["safety-moderation","automation-workflow"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"awesome-ruby-mcp-sdk__cap_7","uri":"capability://automation.workflow.utility.classes.for.common.mcp.patterns","name":"utility classes for common mcp patterns","description":"The SDK includes utility classes that encapsulate common patterns for building MCP servers, such as base classes for tools and resources, helper methods for schema generation, and validation utilities. These utilities reduce boilerplate by providing pre-built implementations of common functionality. Developers can extend or use these utilities directly rather than implementing patterns from scratch. The utilities follow Ruby conventions and integrate seamlessly with the rest of the SDK.","intents":["I want to quickly build tools and resources without writing boilerplate code","I need helper methods for generating JSON schemas for my tools","I want to follow established patterns for MCP server development"],"best_for":["Ruby developers new to MCP who want to follow best practices","Teams building multiple MCP servers and wanting to reuse patterns","Developers who prefer convention over configuration"],"limitations":["Utilities are basic — no advanced features like middleware or interceptors","Schema generation is limited to simple types — complex schemas require manual definition","Utilities assume standard Ruby conventions — customization requires subclassing","No built-in validation beyond JSON Schema — custom validation requires extension"],"requires":["Ruby 2.7+","Knowledge of MCP protocol concepts","JSON Schema familiarity for tool definitions"],"input_types":["Tool or resource definitions","Schema type specifications"],"output_types":["Pre-configured tool or resource instances","Generated JSON schemas","Validated input/output"],"categories":["automation-workflow","code-generation-editing"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"awesome-ruby-mcp-sdk__cap_8","uri":"capability://safety.moderation.protocol.specification.compliance.validation","name":"protocol specification compliance validation","description":"The SDK implements validation of requests and responses against the MCP protocol specification. This includes validating that incoming requests conform to the expected JSON-RPC format, that method names are recognized protocol methods, that request parameters match expected schemas, and that responses conform to protocol-defined structures. Validation happens automatically during request processing and response generation, with validation errors returned as JSON-RPC error responses. The SDK maintains an internal specification reference for validation.","intents":["I want to ensure my server strictly complies with the MCP specification","I need automatic validation of client requests against protocol requirements","I want to catch protocol violations early and return proper error responses"],"best_for":["Teams building production MCP servers that must be spec-compliant","Developers integrating with multiple AI clients that expect strict protocol compliance","Builders who want to avoid manual validation logic"],"limitations":["Validation is strict — no lenient mode for backward compatibility","Custom protocol extensions are not supported — only standard MCP methods","Validation errors are generic — no detailed error messages for debugging","No validation hooks for custom business logic validation","Validation adds latency to request processing (~5-10ms per request)"],"requires":["Ruby 2.7+","MCP protocol specification reference","JSON Schema validation library"],"input_types":["JSON-RPC request objects","Protocol method names","Request parameters"],"output_types":["Validation pass/fail status","JSON-RPC error responses for validation failures","Validated request objects"],"categories":["safety-moderation","tool-use-integration"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"awesome-ruby-mcp-sdk__cap_9","uri":"capability://automation.workflow.server.initialization.and.lifecycle.management","name":"server initialization and lifecycle management","description":"The SDK provides a server initialization pattern that sets up the MCP::Server instance with configured components (tools, prompts, resources), transport layer, and error handling. The server lifecycle includes initialization, request handling loop, and graceful shutdown. Developers call initialization methods to register components, then start the server with a chosen transport. The server manages the request processing loop and handles cleanup on shutdown. Lifecycle hooks allow custom initialization and cleanup logic.","intents":["I want to initialize an MCP server with all my tools, prompts, and resources","I need to start the server and handle the request processing loop","I want to ensure proper cleanup and graceful shutdown"],"best_for":["Developers building standalone MCP servers","Teams deploying MCP servers in containerized environments","Builders who need reliable server startup and shutdown"],"limitations":["Initialization is synchronous — no async setup for slow operations","Lifecycle hooks are basic — no middleware or interceptor pattern","Shutdown is synchronous — no graceful connection draining","No built-in health checks or readiness probes","No automatic restart or recovery on failure"],"requires":["Ruby 2.7+","Transport layer implementation","Registered tools, prompts, and resources"],"input_types":["Server configuration (hash or block)","Transport selection","Component registrations"],"output_types":["Initialized server instance","Request processing loop","Shutdown signal handling"],"categories":["automation-workflow","tool-use-integration"],"confidence":0.5,"matches":0,"success_rate":0}],"trust":{"score":27,"verified":false,"data_access_risk":"high","permissions":["Ruby 2.7+","JSON library for serialization","Transport layer implementation (HTTP or stdio)","JSON Schema validation library","Tool implementation as a Ruby Proc or lambda","Prompt template definition as a string with argument placeholders","Argument definitions (name, description, required flag)","Resource implementation as a Ruby callable returning content","URI pattern definition (string)","MIME type specification"],"failure_modes":["Synchronous request handling only — no built-in async/await support for long-running operations","Request routing is method-name based — no middleware or interceptor pattern for cross-cutting concerns","Error responses follow JSON-RPC 2.0 spec but custom error codes require manual implementation","Tool implementations are synchronous — no native support for async/await or background job queues","Schema validation is JSON Schema only — no custom validation logic hooks","Tool results must be serializable to JSON — complex Ruby objects require manual conversion","No built-in rate limiting, caching, or tool execution monitoring","Prompt templates use simple string substitution — no conditional logic or loops within templates","No built-in versioning or A/B testing for prompts","Argument validation is minimal — no type checking or complex validation rules","builder identity is not verified yet","no observed match outcomes yet"],"rank_breakdown":{"adoption":0.05,"quality":0.3,"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":"2026-06-17T09:51:04.048Z","last_scraped_at":"2026-05-03T14:00:18.053Z","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=ruby-mcp-sdk","compare_url":"https://unfragile.ai/compare?artifact=ruby-mcp-sdk"}},"signature":"OL8KKZxwVLeD3GowZzXSTGCKIfJhkgoznps0oVZIYbf3Ki6tZ4ecyHSo4ZPHbNmUXn9kMYSWzBmg16VAknWKCA==","signedAt":"2026-06-21T04:23:53.971Z","signedBy":"unfragile.ai","version":1},"_links":{"self":"https://unfragile.ai/api/v1/passport/ruby-mcp-sdk","artifact":"https://unfragile.ai/ruby-mcp-sdk","verify":"https://unfragile.ai/api/v1/verify?slug=ruby-mcp-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"}}