CoinCap
MCP ServerFree** - A MCP server that provides real-time cryptocurrency market data through CoinCap's public API without requiring authentication
Capabilities6 decomposed
real-time cryptocurrency price data retrieval
Medium confidenceExposes CoinCap's public REST API endpoints through MCP protocol, enabling Claude and other MCP clients to query current cryptocurrency prices, market caps, and 24h volume data without authentication overhead. Implements HTTP client abstraction that translates MCP tool calls into CoinCap API requests, parsing JSON responses into structured data for LLM consumption.
Eliminates authentication friction by leveraging CoinCap's public API tier, allowing MCP clients to access crypto data without managing secrets or API keys — implemented as a thin HTTP proxy layer that translates MCP tool schemas directly to CoinCap REST endpoints
Simpler deployment than building custom crypto data integrations or using authenticated APIs like CoinGecko Pro, since it requires zero credential management while still providing real-time market data
mcp tool schema exposure for cryptocurrency queries
Medium confidenceImplements 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.
Implements MCP server protocol natively rather than wrapping a generic HTTP client, allowing Claude and other MCP clients to discover and invoke crypto tools with full schema awareness — enables automatic tool selection and parameter binding without manual prompt engineering
More discoverable and composable than REST API documentation or custom prompt instructions, since MCP schema definitions allow Claude to understand tool capabilities, parameters, and return types automatically
multi-cryptocurrency batch price lookup
Medium confidenceSupports 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.
Implements client-side batch aggregation that translates single MCP tool calls into multiple CoinCap API requests, then consolidates results — reduces MCP round-trips while respecting CoinCap's per-request rate limits
More efficient than making separate MCP tool calls for each cryptocurrency, since it reduces Claude's tool invocation overhead and consolidates network requests into a single response
currency conversion and multi-currency price formatting
Medium confidenceAccepts 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.
Delegates currency conversion to CoinCap's API rather than implementing client-side forex logic, ensuring consistency with CoinCap's official rates and reducing maintenance burden for currency pair management
Simpler than integrating a separate forex API, since CoinCap provides built-in conversion rates for all supported currencies in a single API call
error handling and graceful api failure recovery
Medium confidenceImplements 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.
Implements MCP-aware error handling that translates CoinCap API failures into structured MCP error responses with diagnostic context, enabling Claude to understand and respond to failures programmatically rather than receiving raw HTTP errors
More robust than naive API wrapping, since it provides Claude with actionable error information and recovery suggestions rather than opaque HTTP status codes
stdio-based mcp server transport
Medium confidenceImplements 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.
Uses stdio transport instead of HTTP, eliminating port binding and network configuration overhead — implemented as a lightweight subprocess that communicates via JSON-RPC over standard streams, ideal for local development and Claude Desktop integration
Simpler to deploy than HTTP-based MCP servers, since it requires no port management, firewall configuration, or network setup — just subprocess spawning and stdio piping
Capabilities are decomposed by AI analysis. Each maps to specific user intents and improves with match feedback.
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Free Crypto Coin Data
Free live and historical cryptocurrency prices Provide real-time cryptocurrency price data to your applications. Enable seamless access to up-to-date coin prices through a standardized protocol. Enhance your agents with reliable financial data integration effortlessly. • free bitcoin price • bit
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CoinGecko
** - Official [CoinGecko API](https://www.coingecko.com/en/api) MCP Server for Crypto Price & Market Data, across 200+ blokchain networks and 8M+ tokens.
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
- ✓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
- ✓Portfolio management agents tracking multiple crypto holdings
- ✓Market analysis tools comparing price movements across asset classes
Known 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
- ⚠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)
Requirements
Input / Output
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** - A MCP server that provides real-time cryptocurrency market data through CoinCap's public API without requiring authentication
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