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Implements HTTP client abstraction that translates MCP tool calls into CoinCap API requests, parsing JSON responses into structured data for LLM consumption.","intents":["I need to fetch current Bitcoin and Ethereum prices in my Claude conversation without managing API keys","I want to build an agent that monitors crypto market data and makes decisions based on real-time prices","I need to integrate cryptocurrency price lookups into my MCP-based workflow without writing custom API integration code"],"best_for":["AI agents and Claude users needing ad-hoc crypto market data","Developers building MCP servers that require financial data enrichment","Teams prototyping crypto-aware AI applications without authentication complexity"],"limitations":["No authentication required but subject to CoinCap's public API rate limits (typically 10 requests/second)","Data freshness depends on CoinCap's update frequency, typically 1-5 minute delays for price updates","Limited to CoinCap's supported cryptocurrency list; cannot query custom or newly-listed tokens immediately","No historical price data or OHLCV candles — only current snapshot data available"],"requires":["MCP client compatible with CoinCap server (Claude Desktop, custom MCP host, or compatible AI framework)","Network connectivity to CoinCap API (api.coincap.io)","No API key or authentication credentials needed"],"input_types":["cryptocurrency symbol or ID (e.g., 'bitcoin', 'ethereum', 'BTC', 'ETH')","optional currency code for price conversion (e.g., 'USD', 'EUR')"],"output_types":["JSON structured data with price, market cap, 24h volume, percent change","formatted text response for Claude display"],"categories":["tool-use-integration","data-processing-analysis"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"awesome-coincap__cap_1","uri":"capability://tool.use.integration.mcp.tool.schema.exposure.for.cryptocurrency.queries","name":"mcp tool schema exposure for cryptocurrency queries","description":"Implements MCP server protocol to expose cryptocurrency data retrieval as callable tools with structured JSON schemas, enabling Claude and other MCP clients to discover, invoke, and chain crypto data queries within conversations. Uses MCP's tool definition format to describe parameters (symbol, currency), return types, and descriptions that guide LLM tool selection and parameter binding.","intents":["I want Claude to automatically call crypto price lookups when I ask about market conditions","I need to define tool schemas that Claude understands for cryptocurrency data without manual prompt engineering","I'm building an MCP ecosystem and need standardized tool interfaces for financial data"],"best_for":["Claude Desktop users integrating crypto data into conversations","MCP server developers building financial data aggregation platforms","Teams standardizing on MCP for tool orchestration across multiple data sources"],"limitations":["Tool discovery and invocation depends on MCP client implementation — not all clients support full MCP spec","Schema-based parameter binding may require explicit type coercion for edge cases (e.g., symbol normalization)","No built-in caching of tool schemas — each client connection re-negotiates available tools"],"requires":["MCP-compatible client (Claude Desktop 0.3+, or custom MCP host)","MCP server running locally or accessible via stdio/HTTP transport","Understanding of MCP tool schema format (JSON with name, description, inputSchema)"],"input_types":["MCP tool call requests with structured parameters","JSON schema definitions for cryptocurrency query parameters"],"output_types":["MCP tool result responses with structured JSON","error responses with descriptive messages for invalid queries"],"categories":["tool-use-integration"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"awesome-coincap__cap_2","uri":"capability://data.processing.analysis.multi.cryptocurrency.batch.price.lookup","name":"multi-cryptocurrency batch price lookup","description":"Supports querying multiple cryptocurrency prices in a single MCP tool invocation by accepting comma-separated or array-formatted symbol lists, then aggregating results from CoinCap API into a unified response. Implements client-side batching logic that may issue multiple HTTP requests to CoinCap but returns consolidated JSON to the MCP caller, reducing round-trip overhead for agents querying multiple assets.","intents":["I want to compare prices across 5-10 cryptocurrencies in one Claude query without making separate requests","I need to build a portfolio tracker agent that fetches prices for all holdings simultaneously","I'm creating a market analysis tool that requires snapshot data for multiple assets at the same timestamp"],"best_for":["Portfolio management agents tracking multiple crypto holdings","Market analysis tools comparing price movements across asset classes","Developers building crypto dashboards that need efficient multi-asset data fetching"],"limitations":["Batch size may be limited by CoinCap API rate limits — querying 50+ assets simultaneously may trigger rate limiting","No guaranteed atomicity — if some symbols fail, partial results are returned without transaction rollback","Timestamp alignment not guaranteed across batch results — prices may be fetched at slightly different times","No built-in deduplication — requesting the same symbol multiple times will fetch it multiple times"],"requires":["MCP client capable of passing array or comma-separated parameters","Network connectivity to CoinCap API","No additional authentication or configuration"],"input_types":["comma-separated cryptocurrency symbols (e.g., 'BTC,ETH,SOL')","array of symbol strings (e.g., ['bitcoin', 'ethereum', 'solana'])","optional currency code applied to all symbols in batch"],"output_types":["JSON array of price objects, one per queried symbol","error array indicating which symbols failed to resolve"],"categories":["data-processing-analysis","tool-use-integration"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"awesome-coincap__cap_3","uri":"capability://data.processing.analysis.currency.conversion.and.multi.currency.price.formatting","name":"currency conversion and multi-currency price formatting","description":"Accepts optional currency parameter (USD, EUR, GBP, etc.) in price queries and returns cryptocurrency prices converted to the specified fiat currency using CoinCap's built-in conversion rates. Implements parameter validation to ensure only supported currencies are requested, then appends currency code to API requests and formats output with localized currency symbols and decimal precision.","intents":["I need Bitcoin price in EUR for my European user base without manual conversion math","I want to display cryptocurrency prices in multiple currencies simultaneously for a global dashboard","I'm building an agent that respects user locale preferences for currency display"],"best_for":["International crypto applications serving users in multiple regions","Global portfolio trackers that need multi-currency reporting","Agents that adapt output currency based on user location or preferences"],"limitations":["Conversion rates depend on CoinCap's external forex data — may lag real-time market rates by minutes","Limited to CoinCap's supported currency list (typically 30-50 fiat currencies); custom currency codes will fail","No historical currency conversion rates — only current spot rates available","Conversion precision limited to CoinCap's decimal places (typically 2-8 depending on currency)"],"requires":["Valid ISO 4217 currency code supported by CoinCap (e.g., 'USD', 'EUR', 'GBP', 'JPY')","MCP client passing currency parameter in tool invocation","Network connectivity to CoinCap API"],"input_types":["cryptocurrency symbol (e.g., 'BTC')","ISO 4217 currency code (e.g., 'EUR', 'GBP', 'JPY')"],"output_types":["JSON with price in requested currency","formatted string with currency symbol (e.g., '€45,000.50')"],"categories":["data-processing-analysis"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"awesome-coincap__cap_4","uri":"capability://safety.moderation.error.handling.and.graceful.api.failure.recovery","name":"error handling and graceful api failure recovery","description":"Implements error handling layer that catches CoinCap API failures (rate limits, timeouts, invalid symbols) and translates them into user-friendly MCP error responses with diagnostic information. Uses exponential backoff or request queuing for rate-limit scenarios, validates symbol formats before API calls, and returns structured error objects indicating failure reason (invalid symbol, network timeout, rate limit) to help Claude understand and recover from failures.","intents":["I want my agent to handle API failures gracefully without crashing when CoinCap is unavailable","I need clear error messages when a cryptocurrency symbol doesn't exist or is misspelled","I'm building a resilient agent that retries failed requests or suggests alternatives when data is unavailable"],"best_for":["Production agents that must handle transient API failures","Applications requiring user-friendly error messages for invalid crypto symbols","Teams building fault-tolerant financial data pipelines"],"limitations":["Retry logic may add latency (exponential backoff can delay responses by seconds for heavily rate-limited scenarios)","No built-in circuit breaker — repeated failures don't automatically disable the tool","Error recovery depends on MCP client's ability to handle and act on error responses","Rate limit detection relies on HTTP status codes; some API failures may not be distinguishable"],"requires":["MCP client that properly handles error responses and can implement retry logic","Network connectivity to CoinCap API (for detecting actual failures vs. network issues)","Reasonable timeout configuration (typically 5-30 seconds per request)"],"input_types":["any cryptocurrency query parameters (symbol, currency, etc.)"],"output_types":["structured error response with error code (INVALID_SYMBOL, RATE_LIMIT, TIMEOUT, NETWORK_ERROR)","diagnostic message explaining failure reason","optional suggestions for recovery (e.g., 'Did you mean Bitcoin?')"],"categories":["safety-moderation","tool-use-integration"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"awesome-coincap__cap_5","uri":"capability://tool.use.integration.stdio.based.mcp.server.transport","name":"stdio-based mcp server transport","description":"Implements MCP server using stdio transport protocol, allowing the server to run as a subprocess and communicate with MCP clients (Claude Desktop, custom hosts) via standard input/output streams. Uses JSON-RPC message format over stdio to handle tool discovery, invocation, and result streaming without requiring HTTP server setup or port binding, enabling seamless integration with Claude Desktop and other stdio-based MCP clients.","intents":["I want to run a local MCP server for crypto data without managing HTTP ports or network configuration","I need to integrate CoinCap data into Claude Desktop using the native MCP protocol","I'm building a development environment where MCP servers run as lightweight subprocesses"],"best_for":["Claude Desktop users adding local MCP servers via configuration","Developers building lightweight MCP servers without HTTP infrastructure","Teams deploying MCP servers in containerized or sandboxed environments"],"limitations":["Stdio transport limited to single client per server instance — no built-in multiplexing for concurrent clients","No persistent connection pooling — each client connection spawns a new server process","Debugging stdio-based communication requires special tooling (message logging, protocol analyzers)","Performance limited by subprocess overhead and stdio buffering (typically <100ms latency per request)"],"requires":["MCP client supporting stdio transport (Claude Desktop 0.3+, or custom MCP host with stdio support)","Node.js or Python runtime for running the MCP server","Proper configuration in Claude Desktop's settings (mcp_servers.json) or equivalent MCP host config"],"input_types":["JSON-RPC requests over stdin (tool discovery, tool invocation)"],"output_types":["JSON-RPC responses over stdout (tool definitions, tool results)"],"categories":["tool-use-integration","automation-workflow"],"confidence":0.5,"matches":0,"success_rate":0}],"trust":{"score":28,"verified":false,"data_access_risk":"moderate","permissions":["MCP client compatible with CoinCap server (Claude Desktop, custom MCP host, or compatible AI framework)","Network connectivity to CoinCap API (api.coincap.io)","No API key or authentication credentials needed","MCP-compatible client (Claude Desktop 0.3+, or custom MCP host)","MCP server running locally or accessible via stdio/HTTP transport","Understanding of MCP tool schema format (JSON with name, description, inputSchema)","MCP client capable of passing array or comma-separated parameters","Network connectivity to CoinCap API","No additional authentication or configuration","Valid ISO 4217 currency code supported by CoinCap (e.g., 'USD', 'EUR', 'GBP', 'JPY')"],"failure_modes":["No authentication required but subject to CoinCap's public API rate limits (typically 10 requests/second)","Data freshness depends on CoinCap's update frequency, typically 1-5 minute delays for price updates","Limited to CoinCap's supported cryptocurrency list; cannot query custom or newly-listed tokens immediately","No historical price data or OHLCV candles — only current snapshot data available","Tool discovery and invocation depends on MCP client implementation — not all clients support full MCP spec","Schema-based parameter binding may require explicit type coercion for edge cases (e.g., symbol normalization)","No built-in caching of tool schemas — each client connection re-negotiates available tools","Batch size may be limited by CoinCap API rate limits — querying 50+ assets simultaneously may trigger rate limiting","No guaranteed atomicity — if some symbols fail, partial results are returned without transaction rollback","Timestamp alignment not guaranteed across batch results — prices may be fetched at slightly different times","builder identity is not verified yet","no observed match outcomes yet"],"rank_breakdown":{"adoption":0.05,"quality":0.37,"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":"2026-06-17T09:51:02.371Z","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=coincap","compare_url":"https://unfragile.ai/compare?artifact=coincap"}},"signature":"KaGzauRgEz9q24Q9EwoRDGQWVi8DHxk0xWV5LLjtyHYaeSyOtQklgjfLkR2utQiPwWOopMoH/QWHXUBOrnzyCw==","signedAt":"2026-06-22T19:48:20.787Z","signedBy":"unfragile.ai","version":1},"_links":{"self":"https://unfragile.ai/api/v1/passport/coincap","artifact":"https://unfragile.ai/coincap","verify":"https://unfragile.ai/api/v1/verify?slug=coincap","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"}}