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Uses Mojolicious's Mojo::IOLoop for event-driven request processing without blocking.","intents":["Build an MCP server that exposes Perl tools and resources to Claude and other LLM clients","Create a long-running Perl service that handles concurrent MCP requests without blocking","Integrate existing Perl codebases as MCP resources accessible to AI agents"],"best_for":["Perl developers building LLM-integrated tools and agents","Teams with legacy Perl systems needing AI-native interfaces","Developers familiar with Mojolicious seeking MCP capabilities"],"limitations":["Perl ecosystem smaller than Python/Node.js — fewer third-party MCP tools available","Async patterns in Perl less mature than JavaScript Promises/async-await, requiring callback or Future-based code","Performance overhead of Perl interpreter vs compiled languages for high-throughput scenarios"],"requires":["Perl 5.20+","Mojolicious 9.0+","JSON::XS or JSON::PP for message serialization","IO::Async or Mojo::IOLoop event loop support"],"input_types":["JSON-RPC 2.0 requests","stdio streams","WebSocket frames"],"output_types":["JSON-RPC 2.0 responses","stdio streams","WebSocket frames"],"categories":["tool-use-integration","automation-workflow"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"awesome-perl-sdk__cap_1","uri":"capability://tool.use.integration.mcp.client.request.response.handling.with.protocol.validation","name":"mcp client request/response handling with protocol validation","description":"Implements MCP client-side protocol handling including JSON-RPC 2.0 message construction, request ID tracking, response correlation, and error handling. Validates incoming messages against MCP schema, manages request timeouts, and provides typed method calls for standard MCP operations (list_resources, call_tool, read_resource). Uses Perl's type system and validation libraries to ensure protocol compliance.","intents":["Connect to remote MCP servers and invoke their tools/resources from Perl code","Build Perl agents that orchestrate multiple MCP servers","Handle MCP protocol details automatically without manual JSON-RPC boilerplate"],"best_for":["Perl developers building MCP client agents","Teams integrating Perl applications with MCP-compatible services","Developers needing reliable request-response correlation in async contexts"],"limitations":["No built-in connection pooling — each client instance maintains single connection","Timeout handling relies on Perl's alarm() or Mojo::IOLoop timers, less precise than native OS-level timeouts","Error recovery (reconnection, exponential backoff) not built-in, requires manual implementation"],"requires":["Perl 5.20+","Mojolicious 9.0+","JSON::XS for fast serialization","Network connectivity to MCP server"],"input_types":["MCP server endpoint (stdio, WebSocket, or HTTP)","Tool/resource names and parameters","JSON-RPC method names"],"output_types":["Structured Perl data (hashes/arrays)","JSON-RPC responses","Error objects with code and message"],"categories":["tool-use-integration","planning-reasoning"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"awesome-perl-sdk__cap_2","uri":"capability://tool.use.integration.resource.and.tool.definition.with.schema.based.validation","name":"resource and tool definition with schema-based validation","description":"Provides declarative syntax for defining MCP resources (files, APIs, databases) and tools (callable functions) with JSON Schema validation. Developers define resource metadata (name, description, MIME type, URI template) and tool signatures (parameters, return types) using Perl data structures or builder methods. The SDK automatically generates JSON Schema from Perl type hints and validates incoming requests against these schemas before invoking handlers.","intents":["Define what tools and resources an MCP server exposes without manual schema writing","Validate tool parameters automatically before handler execution","Generate OpenAPI/JSON Schema documentation from Perl code"],"best_for":["Perl developers building MCP servers with complex tool signatures","Teams needing schema-driven validation without external schema files","Developers familiar with Perl's type systems (Moose, Type::Tiny)"],"limitations":["Schema generation from Perl types requires explicit type annotations — implicit types not supported","Complex nested schemas may require manual JSON Schema overrides","No built-in OpenAPI/Swagger export — requires custom serialization"],"requires":["Perl 5.20+","Type::Tiny or Moose for type definitions","JSON::Schema or similar for validation","Mojolicious 9.0+"],"input_types":["Perl data structures (hashes, arrays)","Type::Tiny type definitions","JSON Schema objects"],"output_types":["JSON Schema definitions","MCP resource/tool metadata","Validation error messages"],"categories":["tool-use-integration","data-processing-analysis"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"awesome-perl-sdk__cap_3","uri":"capability://tool.use.integration.transport.abstraction.layer.stdio.websocket.http","name":"transport abstraction layer (stdio, websocket, http)","description":"Abstracts MCP communication over multiple transport protocols through a pluggable transport interface. Supports stdio (for local tool integration), WebSocket (for persistent connections), and HTTP (for request-response patterns). Each transport handles framing, serialization, and connection lifecycle independently. The SDK routes messages through the appropriate transport based on server/client configuration without requiring application code changes.","intents":["Run MCP servers as stdio-based tools integrated with Claude Desktop or other clients","Expose MCP servers over WebSocket for remote access","Support both local and remote MCP deployments with same code"],"best_for":["Developers needing flexible deployment options for MCP servers","Teams integrating MCP with existing Perl web services","Operators deploying MCP servers in containerized/serverless environments"],"limitations":["HTTP transport lacks persistent connection benefits — each request incurs connection overhead","stdio transport limited to local machine or SSH tunneling","WebSocket requires additional dependencies (Mojolicious::Plugin::WebSocket) and TLS setup for production"],"requires":["Perl 5.20+","Mojolicious 9.0+","For WebSocket: Mojolicious::Plugin::WebSocket","For HTTP: Mojolicious built-in HTTP server"],"input_types":["Transport configuration (protocol, host, port, path)","JSON-RPC messages","Connection parameters"],"output_types":["Serialized messages over selected transport","Connection status/errors","Transport-specific metadata"],"categories":["tool-use-integration","automation-workflow"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"awesome-perl-sdk__cap_4","uri":"capability://automation.workflow.async.request.handling.with.perl.futures.promises","name":"async request handling with perl futures/promises","description":"Enables non-blocking request handling using Perl's Future or Promise libraries integrated with Mojolicious's Mojo::IOLoop event reactor. Tool handlers can return futures that resolve asynchronously, allowing the server to process multiple concurrent requests without blocking. The SDK automatically manages future resolution, error propagation, and timeout handling within the event loop.","intents":["Handle long-running tool operations (database queries, API calls) without blocking other requests","Build MCP servers that process multiple concurrent client requests efficiently","Integrate async Perl libraries (async database drivers, HTTP clients) into MCP tools"],"best_for":["Developers building high-concurrency MCP servers","Teams with async Perl codebases (using Future, Async::Await, or IO::Async)","Operators deploying MCP servers handling many simultaneous clients"],"limitations":["Perl's async ecosystem less mature than JavaScript — fewer libraries support futures natively","Callback-based code can become complex (callback hell) without careful abstraction","Debugging async Perl code more difficult than synchronous code due to stack trace fragmentation"],"requires":["Perl 5.20+","Mojolicious 9.0+","Future or Promise library","Async-compatible database/HTTP drivers (e.g., Mojo::UserAgent for HTTP)"],"input_types":["Tool handler subroutines returning futures","Async operation results","Timeout specifications"],"output_types":["Resolved future values","Error objects from failed futures","Timeout exceptions"],"categories":["automation-workflow","tool-use-integration"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"awesome-perl-sdk__cap_5","uri":"capability://automation.workflow.middleware.and.plugin.system.for.request.response.interception","name":"middleware and plugin system for request/response interception","description":"Provides Mojolicious-style middleware hooks for intercepting and modifying MCP requests and responses before/after handler execution. Developers register middleware that runs in a chain, enabling cross-cutting concerns like logging, authentication, rate limiting, and request transformation. Middleware can short-circuit request processing (e.g., deny unauthorized requests) or modify request/response payloads.","intents":["Add authentication/authorization to MCP servers without modifying tool handlers","Log all MCP requests and responses for auditing","Implement rate limiting or request throttling at the protocol level","Transform requests/responses (e.g., add tracing headers, sanitize outputs)"],"best_for":["Developers building production MCP servers with security requirements","Teams needing observability (logging, tracing) across MCP operations","Operators implementing multi-tenant MCP servers with per-client policies"],"limitations":["Middleware adds latency to every request — no way to bypass for performance-critical paths","Error handling in middleware can be complex if not carefully designed","Middleware execution order matters but can be implicit/confusing with many plugins"],"requires":["Perl 5.20+","Mojolicious 9.0+","Understanding of Mojolicious middleware patterns"],"input_types":["MCP request objects","Handler context","Configuration parameters"],"output_types":["Modified requests","Modified responses","Error responses (for short-circuit)","Logging/telemetry data"],"categories":["automation-workflow","safety-moderation"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"awesome-perl-sdk__cap_6","uri":"capability://safety.moderation.error.handling.and.exception.propagation.with.mcp.error.codes","name":"error handling and exception propagation with mcp error codes","description":"Provides structured error handling that maps Perl exceptions to MCP-compliant error responses with standard error codes (INVALID_REQUEST, METHOD_NOT_FOUND, INVALID_PARAMS, INTERNAL_ERROR, SERVER_ERROR). Developers throw Perl exceptions in tool handlers, and the SDK automatically converts them to JSON-RPC error objects with appropriate codes and messages. Supports custom error codes and error context propagation.","intents":["Handle tool execution errors and return them as proper MCP error responses","Distinguish between client errors (bad parameters) and server errors (internal failures)","Provide detailed error messages for debugging while hiding sensitive information from clients"],"best_for":["Developers building robust MCP servers with comprehensive error handling","Teams needing consistent error reporting across multiple tools","Operators debugging MCP server failures"],"limitations":["Error context (stack traces) may leak sensitive information if not carefully filtered","Custom error codes not standardized — clients may not understand them","No built-in error recovery (retry logic) — clients must implement"],"requires":["Perl 5.20+","Mojolicious 9.0+","Exception handling library (Try::Tiny, Syntax::Keyword::Try)"],"input_types":["Perl exceptions (die, throw)","Error codes","Error messages and context"],"output_types":["JSON-RPC error objects","HTTP error status codes","Structured error responses"],"categories":["safety-moderation","tool-use-integration"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"awesome-perl-sdk__cap_7","uri":"capability://data.processing.analysis.type.coercion.and.parameter.validation.for.tool.arguments","name":"type coercion and parameter validation for tool arguments","description":"Automatically validates and coerces tool arguments based on JSON Schema definitions before passing to handlers. Converts JSON types to Perl types (strings to numbers, arrays to Perl arrays, objects to hashes), validates constraints (min/max, pattern, enum), and rejects invalid arguments with detailed error messages. Uses JSON Schema validators integrated with Perl type systems.","intents":["Ensure tool handlers receive correctly-typed arguments without manual validation","Reject invalid requests early with clear error messages","Support complex argument types (nested objects, arrays, enums)"],"best_for":["Developers building MCP servers with strict type requirements","Teams needing automatic input validation without boilerplate","Operators ensuring data quality in MCP tool invocations"],"limitations":["Type coercion may fail silently or produce unexpected results for edge cases","Complex validation rules require explicit JSON Schema — implicit validation limited","Performance overhead of validation adds latency to every request"],"requires":["Perl 5.20+","JSON::Schema or JSON::Validator","Type::Tiny for type definitions"],"input_types":["JSON arguments from MCP requests","JSON Schema definitions","Type constraints"],"output_types":["Coerced Perl values","Validation error messages","Type mismatch errors"],"categories":["data-processing-analysis","tool-use-integration"],"confidence":0.5,"matches":0,"success_rate":0}],"trust":{"score":27,"verified":false,"data_access_risk":"high","permissions":["Perl 5.20+","Mojolicious 9.0+","JSON::XS or JSON::PP for message serialization","IO::Async or Mojo::IOLoop event loop support","JSON::XS for fast serialization","Network connectivity to MCP server","Type::Tiny or Moose for type definitions","JSON::Schema or similar for validation","For WebSocket: Mojolicious::Plugin::WebSocket","For HTTP: Mojolicious built-in HTTP server"],"failure_modes":["Perl ecosystem smaller than Python/Node.js — fewer third-party MCP tools available","Async patterns in Perl less mature than JavaScript Promises/async-await, requiring callback or Future-based code","Performance overhead of Perl interpreter vs compiled languages for high-throughput scenarios","No built-in connection pooling — each client instance maintains single connection","Timeout handling relies on Perl's alarm() or Mojo::IOLoop timers, less precise than native OS-level timeouts","Error recovery (reconnection, exponential backoff) not built-in, requires manual implementation","Schema generation from Perl types requires explicit type annotations — implicit types not supported","Complex nested schemas may require manual JSON Schema overrides","No built-in OpenAPI/Swagger export — requires custom serialization","HTTP transport lacks persistent connection benefits — each request incurs connection overhead","builder identity is not verified yet","no observed match outcomes yet"],"rank_breakdown":{"adoption":0.05,"quality":0.26,"ecosystem":0.39999999999999997,"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":"2026-06-17T09:51:03.579Z","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=perl-sdk","compare_url":"https://unfragile.ai/compare?artifact=perl-sdk"}},"signature":"yVwT/VAKlir/r+q4v8oOaDo+VGLsa8L5L6pBXHthBXU2CCVpDXW/rr2bxCqz8uPXAnJZVkDiyo9z2GuMBuDmDQ==","signedAt":"2026-06-21T07:41:54.791Z","signedBy":"unfragile.ai","version":1},"_links":{"self":"https://unfragile.ai/api/v1/passport/perl-sdk","artifact":"https://unfragile.ai/perl-sdk","verify":"https://unfragile.ai/api/v1/verify?slug=perl-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"}}