{"passport":{"unfragile":{"@version":"1.0","version":"2026-05","artifact":{"id":"awesome-square","slug":"square","name":"Square","type":"mcp","url":"https://github.com/square/square-mcp-server","page_url":"https://unfragile.ai/square","categories":["mcp-servers"],"tags":[],"pricing":{"model":"open_source","free":true,"starting_price":null},"status":"active","verified":false},"capabilities":[{"id":"awesome-square__cap_0","uri":"capability://tool.use.integration.api.service.discovery.and.introspection.via.mcp.protocol","name":"api service discovery and introspection via mcp protocol","description":"Exposes Square's complete API service catalog through the get_service_info MCP tool, enabling AI assistants to programmatically discover available services (payments, customers, inventory, etc.) and their methods without manual documentation lookup. The server maintains an in-memory registry of Square API services and returns structured metadata about available operations, parameters, and return types through the standardized MCP tool interface.","intents":["Discover what Square API services are available without reading documentation","Understand which methods exist for a specific service like 'payments' or 'customers'","Enable AI assistants to self-discover API capabilities for autonomous operation planning"],"best_for":["AI assistants (Claude, Goose) building autonomous workflows against Square","Developers building agentic systems that need to dynamically explore Square's API surface"],"limitations":["Service discovery is read-only — does not expose real-time API changes or deprecated endpoints","Metadata is static and baked into the server at build time, not dynamically fetched from Square","No filtering or search across services — returns full catalog regardless of relevance"],"requires":["Node.js 18+ (based on package.json modern syntax)","MCP client implementation (Claude, Goose, or custom MCP consumer)","No API key required for service discovery — metadata is public"],"input_types":["service_name (string, e.g., 'payments', 'customers', 'inventory')"],"output_types":["structured JSON with service metadata including method names, descriptions, and parameter schemas"],"categories":["tool-use-integration","search-retrieval"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"awesome-square__cap_1","uri":"capability://tool.use.integration.type.schema.resolution.and.parameter.validation.via.mcp","name":"type schema resolution and parameter validation via mcp","description":"The get_type_info MCP tool resolves detailed parameter requirements and data structure definitions for Square API methods, translating Square's OpenAPI-derived type system into structured schemas that AI assistants can use for request validation and construction. This tool returns comprehensive type metadata including required fields, field types, constraints, and nested object structures, enabling AI systems to construct valid API payloads without trial-and-error.","intents":["Understand what parameters a specific API method requires before making a request","Validate that a constructed API request has the correct field types and required fields","Resolve nested object structures (e.g., what fields does a 'Money' type contain?)"],"best_for":["AI agents that need to construct valid Square API requests with high accuracy","Developers building request builders or form generators for Square operations","Systems requiring schema-driven validation before API calls"],"limitations":["Type resolution is synchronous and may add latency for deeply nested type hierarchies","Does not provide runtime validation — only schema metadata; actual validation happens at Square's API","Custom attributes and merchant-specific types may not be fully represented in the static schema"],"requires":["Node.js 18+","MCP client connection to the Square MCP server","Knowledge of service and method names (obtained via get_service_info)"],"input_types":["service_name (string)","method_name (string)"],"output_types":["structured JSON schema with type definitions, required fields, field constraints, and nested type references"],"categories":["tool-use-integration","data-processing-analysis"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"awesome-square__cap_2","uri":"capability://tool.use.integration.authenticated.api.request.execution.with.credential.management","name":"authenticated api request execution with credential management","description":"The make_api_request MCP tool executes authenticated HTTP requests to Square's Connect API, handling credential injection (API key from environment), request serialization, and response parsing through a single MCP interface. The server manages API authentication state via environment variables (SQUARE_ACCESS_TOKEN) and abstracts away HTTP client details, allowing AI assistants to invoke Square operations by specifying service, method, and parameters without managing authentication or network concerns.","intents":["Execute a Square API operation (e.g., create a payment, list customers) from an AI assistant","Perform business operations (payments, refunds, inventory updates) without exposing credentials to the AI system","Handle authentication and error responses transparently while returning structured results"],"best_for":["AI agents executing business workflows against Square (payments, orders, inventory)","Agentic systems that need secure, credential-isolated API execution","Teams building autonomous business automation on top of Square"],"limitations":["Credentials are managed via environment variables — no dynamic credential rotation or multi-tenant support","Rate limiting is delegated to Square's API — no client-side rate limit handling or backoff","Request/response size is limited by MCP protocol constraints (typically 100MB+ but depends on client)","No built-in request caching — each call hits Square's API directly"],"requires":["Node.js 18+","SQUARE_ACCESS_TOKEN environment variable set with a valid Square API key","MCP client connection","Network connectivity to Square's API endpoints (api.squareup.com)"],"input_types":["service_name (string)","method_name (string)","request_body (JSON object with method parameters)"],"output_types":["structured JSON response from Square API, or error object with status code and message"],"categories":["tool-use-integration","automation-workflow"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"awesome-square__cap_3","uri":"capability://automation.workflow.mcp.server.lifecycle.management.and.cli.configuration","name":"mcp server lifecycle management and cli configuration","description":"Provides a command-line interface (CLI) for installing, starting, and configuring the Square MCP server for use with AI assistants (Claude, Goose). The CLI handles server initialization, environment variable setup, and generates integration URLs for connecting AI assistants to the running server. The server implements the MCP protocol specification, managing tool registration, request routing, and response serialization for the three core tools (get_service_info, get_type_info, make_api_request).","intents":["Install and configure the Square MCP server for a specific AI assistant (Claude or Goose)","Start the MCP server and make it available to AI assistants","Generate integration URLs for connecting Claude or Goose to the running server"],"best_for":["Developers setting up Square integration with Claude or Goose","Teams deploying autonomous agents that need Square API access","DevOps engineers managing MCP server infrastructure"],"limitations":["CLI is Node.js-only — no Python or Go implementations provided","Server runs as a single process — no built-in clustering or horizontal scaling","Configuration is environment-variable based — no config file support for complex setups","No built-in logging or observability — relies on stdout/stderr"],"requires":["Node.js 18+ with npm or yarn","SQUARE_ACCESS_TOKEN environment variable for API authentication","AI assistant client (Claude via Anthropic API, or Goose)","Network connectivity between AI assistant and MCP server"],"input_types":["CLI commands: 'install', 'start', 'get-goose-url'"],"output_types":["server process (stdout/stderr logs)","integration URLs for AI assistants","MCP protocol messages (JSON-RPC 2.0)"],"categories":["automation-workflow","tool-use-integration"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"awesome-square__cap_4","uri":"capability://tool.use.integration.multi.service.api.catalog.with.20.business.domains","name":"multi-service api catalog with 20+ business domains","description":"Exposes a comprehensive catalog of Square's business API services organized across 20+ domains including payments, inventory, customers, bookings, labor, and hardware integration. The server maintains structured metadata for each service category (Catalog & Inventory, Customers & Orders, Payments & Financial, Business Management, etc.), enabling AI assistants to discover and operate across Square's entire business platform without domain-specific knowledge.","intents":["Discover all available Square API services across different business domains","Understand which service to use for a specific business operation (e.g., 'payments' for transactions, 'inventory' for stock management)","Build cross-domain workflows that span multiple Square services (e.g., create order → process payment → update inventory)"],"best_for":["AI agents building multi-domain business workflows (order management, payments, inventory)","Developers integrating Square's full platform capabilities into autonomous systems","Enterprises needing unified API access across all Square business domains"],"limitations":["Service catalog is static — does not reflect real-time API availability or regional variations","Some services may have dependencies or prerequisites not exposed in the catalog","Hardware services (terminal, devices, cashdrawers) require physical hardware integration not validated by the server","Custom attributes services may not reflect merchant-specific customizations"],"requires":["Node.js 18+","MCP client connection","Appropriate Square API permissions for each service domain being accessed"],"input_types":["service_name (string from catalog: payments, customers, inventory, bookings, etc.)"],"output_types":["service metadata including available methods, descriptions, and parameter schemas"],"categories":["tool-use-integration","search-retrieval"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"awesome-square__cap_5","uri":"capability://tool.use.integration.claude.and.goose.ai.assistant.integration.with.automatic.configuration","name":"claude and goose ai assistant integration with automatic configuration","description":"Provides pre-built integration paths for Claude (via Anthropic API) and Goose AI assistants, with automatic configuration generation and URL-based setup. The server detects the target AI assistant and generates appropriate integration URLs or configuration snippets, abstracting away MCP protocol details and enabling one-command setup for connecting AI assistants to Square's API ecosystem.","intents":["Configure Claude to use Square MCP server without manual MCP protocol setup","Generate integration URLs for Goose to connect to the Square MCP server","Enable AI assistants to automatically discover and use Square API tools"],"best_for":["Developers using Claude or Goose who want Square API integration","Teams deploying AI assistants with Square business automation","Non-technical users setting up AI-powered Square workflows"],"limitations":["Only supports Claude and Goose — no integration for other AI assistants (ChatGPT, Gemini, etc.)","Configuration is one-way — changes to the MCP server require manual reconfiguration of AI assistants","No built-in support for multiple concurrent AI assistant connections","Integration URLs are time-limited or may require periodic refresh depending on AI assistant implementation"],"requires":["Node.js 18+","Claude API key (for Claude integration) or Goose installation (for Goose integration)","SQUARE_ACCESS_TOKEN environment variable","Network connectivity between AI assistant and MCP server"],"input_types":["CLI command: 'install' (for Claude) or 'get-goose-url' (for Goose)"],"output_types":["configuration instructions for Claude","integration URL for Goose","MCP server connection details"],"categories":["tool-use-integration","automation-workflow"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"awesome-square__cap_6","uri":"capability://safety.moderation.environment.based.credential.and.configuration.management","name":"environment-based credential and configuration management","description":"Manages Square API authentication and server configuration through environment variables (SQUARE_ACCESS_TOKEN, etc.), providing a secure, externalized credential store that isolates secrets from code and configuration files. The configuration system reads environment variables at server startup and injects credentials into API requests, enabling secure credential management without exposing keys to AI assistants or storing them in version control.","intents":["Securely manage Square API credentials without embedding them in code","Configure the MCP server for different environments (development, staging, production) via environment variables","Prevent accidental credential exposure in logs or configuration files"],"best_for":["Teams deploying MCP servers in containerized or cloud environments (Docker, Kubernetes, Lambda)","DevOps engineers managing credential rotation and secret management","Organizations with strict security policies requiring externalized credential management"],"limitations":["No built-in credential rotation — credentials must be manually updated via environment variable changes","No multi-tenant support — single credential per server instance","Environment variables are loaded at startup — changes require server restart","No audit logging of credential access or API calls","Credentials are stored in process memory — vulnerable to memory dumps or process inspection"],"requires":["Node.js 18+","SQUARE_ACCESS_TOKEN environment variable set before server startup","Container runtime or process manager that supports environment variable injection (Docker, systemd, etc.)"],"input_types":["environment variables: SQUARE_ACCESS_TOKEN (required), others as needed"],"output_types":["authenticated API requests with credentials injected"],"categories":["safety-moderation","automation-workflow"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"awesome-square__cap_7","uri":"capability://tool.use.integration.json.rpc.2.0.mcp.protocol.implementation.with.tool.registration","name":"json-rpc 2.0 mcp protocol implementation with tool registration","description":"Implements the Model Context Protocol (MCP) specification using JSON-RPC 2.0 messaging, with automatic tool registration and request routing for the three core Square tools. The server handles MCP protocol details including request/response serialization, error handling, and tool discovery, abstracting away protocol complexity from AI assistants and enabling them to invoke Square operations through a standardized interface.","intents":["Enable AI assistants to discover available tools (get_service_info, get_type_info, make_api_request) through MCP protocol","Route tool invocations from AI assistants to the appropriate handler functions","Serialize and deserialize JSON-RPC 2.0 messages for MCP communication"],"best_for":["AI assistants implementing MCP client protocol (Claude, Goose, custom implementations)","Developers building MCP servers for other APIs or services","Teams standardizing on MCP for AI assistant integrations"],"limitations":["MCP protocol overhead adds latency compared to direct API calls (typically 10-50ms per request)","Tool invocations are serialized — no parallel tool execution within a single MCP request","Error handling is limited to JSON-RPC 2.0 error format — no custom error types","No built-in request validation — relies on AI assistant to construct valid requests"],"requires":["Node.js 18+ with MCP protocol library support","MCP client implementation (Claude, Goose, or custom)","JSON-RPC 2.0 compatible transport (stdio, HTTP, WebSocket)"],"input_types":["JSON-RPC 2.0 requests with method name and parameters"],"output_types":["JSON-RPC 2.0 responses with result or error"],"categories":["tool-use-integration"],"confidence":0.5,"matches":0,"success_rate":0}],"trust":{"score":26,"verified":false,"data_access_risk":"high","permissions":["Node.js 18+ (based on package.json modern syntax)","MCP client implementation (Claude, Goose, or custom MCP consumer)","No API key required for service discovery — metadata is public","Node.js 18+","MCP client connection to the Square MCP server","Knowledge of service and method names (obtained via get_service_info)","SQUARE_ACCESS_TOKEN environment variable set with a valid Square API key","MCP client connection","Network connectivity to Square's API endpoints (api.squareup.com)","Node.js 18+ with npm or yarn"],"failure_modes":["Service discovery is read-only — does not expose real-time API changes or deprecated endpoints","Metadata is static and baked into the server at build time, not dynamically fetched from Square","No filtering or search across services — returns full catalog regardless of relevance","Type resolution is synchronous and may add latency for deeply nested type hierarchies","Does not provide runtime validation — only schema metadata; actual validation happens at Square's API","Custom attributes and merchant-specific types may not be fully represented in the static schema","Credentials are managed via environment variables — no dynamic credential rotation or multi-tenant support","Rate limiting is delegated to Square's API — no client-side rate limit handling or backoff","Request/response size is limited by MCP protocol constraints (typically 100MB+ but depends on client)","No built-in request caching — each call hits Square's API directly","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":0.52,"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":"2026-06-17T09:51:04.049Z","last_scraped_at":"2026-05-03T14:00:15.503Z","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=square","compare_url":"https://unfragile.ai/compare?artifact=square"}},"signature":"pSNzMxZeBKc+SMgDS/V17Bny/Er6nX+x/tgfpaj7vMIaZnXJ1J4BX5KcA6CLOUG5vJJnj/54ohLzoGHjEaL3Aw==","signedAt":"2026-07-08T05:51:55.374Z","signedBy":"unfragile.ai","version":1},"_links":{"self":"https://unfragile.ai/api/v1/passport/square","artifact":"https://unfragile.ai/square","verify":"https://unfragile.ai/api/v1/verify?slug=square","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"}}