real-time cryptocurrency price data retrieval, mcp tool schema exposure for cryptocurrency queries, multi-cryptocurrency batch price lookup, currency conversion and multi-currency price formatting, error handling and graceful api failure recovery, stdio-based mcp server transport

CoinCap

MCP ServerFree

** - A MCP server that provides real-time cryptocurrency market data through CoinCap's public API without requiring authentication

Open Source

/ 100

6 capabilities

Capabilities6 decomposed

real-time cryptocurrency price data retrieval

Medium confidence

Exposes 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.

Solves for

I need to fetch current Bitcoin and Ethereum prices in my Claude conversation without managing API keysI want to build an agent that monitors crypto market data and makes decisions based on real-time pricesI 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

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

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

What makes it unique

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

vs alternatives

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 confidence

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.

Solves for

I want Claude to automatically call crypto price lookups when I ask about market conditionsI need to define tool schemas that Claude understands for cryptocurrency data without manual prompt engineeringI'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

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)

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

What makes it unique

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

vs alternatives

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 confidence

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.

Solves for

I want to compare prices across 5-10 cryptocurrencies in one Claude query without making separate requestsI need to build a portfolio tracker agent that fetches prices for all holdings simultaneouslyI'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

Requires

MCP client capable of passing array or comma-separated parameters

Network connectivity to CoinCap API

No additional authentication or configuration

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

What makes it unique

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

vs alternatives

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 confidence

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.

Solves for

I need Bitcoin price in EUR for my European user base without manual conversion mathI want to display cryptocurrency prices in multiple currencies simultaneously for a global dashboardI'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

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

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

What makes it unique

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

vs alternatives

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 confidence

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.

Solves for

I want my agent to handle API failures gracefully without crashing when CoinCap is unavailableI need clear error messages when a cryptocurrency symbol doesn't exist or is misspelledI'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

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)

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

What makes it unique

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

vs alternatives

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 confidence

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.

Solves for

I want to run a local MCP server for crypto data without managing HTTP ports or network configurationI need to integrate CoinCap data into Claude Desktop using the native MCP protocolI'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

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

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)

What makes it unique

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

vs alternatives

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.

Related Artifactssharing capabilities

Artifacts that share capabilities with CoinCap, ranked by overlap. Discovered automatically through the match graph.

MCP Server24

CoinGecko

** - Official [CoinGecko API](https://www.coingecko.com/en/api) MCP Server for Crypto Price & Market Data, across 200+ blokchain networks and 8M+ tokens.

real-time cryptocurrency price retrieval across 15,000+ coinstool availability matrix with 76+ tools in pro tiermulti-provider mcp transport with http streaming and sse fallback

3 shared capabilities

MCP Server26

Twelve Data

** - Interact with [Twelve Data](https://twelvedata.com) APIs to access real-time and historical financial market data for your AI agents.

cryptocurrency and digital asset data accessreal-time market data streaming via mcp protocol

2 shared capabilities

MCP Server24

Financial Datasets

** - Stock market API made for AI agents

cryptocurrency price and ticker enumeration with multi-asset supportmcp-based financial data tool exposure for ai agents

2 shared capabilities

MCP Server23

Awesome Crypto MCP Servers by badkk

** - A curated list of MCP servers by **[Luke Fan](https://github.com/badkk)**

mcp server discovery and curationmcp server categorization and taxonomy

2 shared capabilities

MCP Server27

Database

** (by Legion AI) - Universal database MCP server supporting multiple database types including PostgreSQL, Redshift, CockroachDB, MySQL, RDS MySQL, Microsoft SQL Server, BigQuery, Oracle DB, and SQLite

multi-database unified query execution via mcp protocolmcp tool-based database operation interface

2 shared capabilities

MCP Server27

Hive Intelligence

** 📇 ☁️ 🏠 - Hive Intelligence: Ultimate cryptocurrency MCP for AI assistants with unified access to crypto, DeFi, and Web3 analytics. Hive's remote mcp server guide [remote server](https://hiveintelligence.xyz/crypto-mcp).

unified-crypto-market-data-aggregation

1 shared capability

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

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 neededMCP-compatible client (Claude Desktop 0.3+, or custom MCP host)MCP server running locally or accessible via stdio/HTTP transportUnderstanding of MCP tool schema format (JSON with name, description, inputSchema)MCP client capable of passing array or comma-separated parametersNetwork connectivity to CoinCap API

Input / Output

Accepts: cryptocurrency symbol or ID (e.g., 'bitcoin', 'ethereum', 'BTC', 'ETH'), optional currency code for price conversion (e.g., 'USD', 'EUR'), MCP tool call requests with structured parameters, JSON schema definitions for cryptocurrency query parameters, 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, cryptocurrency symbol (e.g., 'BTC'), ISO 4217 currency code (e.g., 'EUR', 'GBP', 'JPY'), any cryptocurrency query parameters (symbol, currency, etc.), JSON-RPC requests over stdin (tool discovery, tool invocation)

Produces: JSON structured data with price, market cap, 24h volume, percent change, formatted text response for Claude display, MCP tool result responses with structured JSON, error responses with descriptive messages for invalid queries, JSON array of price objects, one per queried symbol, error array indicating which symbols failed to resolve, JSON with price in requested currency, formatted string with currency symbol (e.g., '€45,000.50'), 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?'), JSON-RPC responses over stdout (tool definitions, tool results)

UnfragileRank

Adoption15%(25% weight)

Quality22%(25% weight)

Ecosystem30%(15% weight)

Match Graph25%(30% weight)

Freshness75%(5% weight)

UnfragileRank is computed from adoption signals, documentation quality, ecosystem connectivity, match graph feedback, and freshness. No artifact can pay for a higher rank.

Type: MCP Server

6 capabilities

Visit CoinCap→

About

** - A MCP server that provides real-time cryptocurrency market data through CoinCap's public API without requiring authentication

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Capabilities6 decomposed

real-time cryptocurrency price data retrieval

Medium confidence

Solves for

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

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

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

What makes it unique

vs alternatives

mcp tool schema exposure for cryptocurrency queries

Medium confidence

Solves for

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

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)

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

What makes it unique

vs alternatives

multi-cryptocurrency batch price lookup

Medium confidence

Solves for

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

Requires

MCP client capable of passing array or comma-separated parameters

Network connectivity to CoinCap API

No additional authentication or configuration

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

What makes it unique

vs alternatives

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 confidence

Solves for

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

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

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

What makes it unique

vs alternatives

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 confidence

Solves for

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

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)

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

What makes it unique

vs alternatives

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 confidence

Solves for

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

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

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)

What makes it unique

vs alternatives

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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Claude Code for VS Code48Extension

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CoinCap

Capabilities6 decomposed

real-time cryptocurrency price data retrieval

mcp tool schema exposure for cryptocurrency queries

multi-cryptocurrency batch price lookup

currency conversion and multi-currency price formatting

error handling and graceful api failure recovery

stdio-based mcp server transport

Related Artifactssharing capabilities

CoinGecko

Twelve Data

Financial Datasets

Awesome Crypto MCP Servers by badkk

Database

Hive Intelligence

Best For

Known Limitations

Requirements

Input / Output

UnfragileRank

About

Categories

Alternatives to CoinCap

Are you the builder of CoinCap?

Get the weekly brief

Data Sources

CoinCap

Capabilities6 decomposed

real-time cryptocurrency price data retrieval

mcp tool schema exposure for cryptocurrency queries

multi-cryptocurrency batch price lookup

currency conversion and multi-currency price formatting

error handling and graceful api failure recovery

stdio-based mcp server transport

Related Artifactssharing capabilities

CoinGecko

Twelve Data

Financial Datasets

Awesome Crypto MCP Servers by badkk

Database

Hive Intelligence

Best For

Known Limitations

Requirements

Input / Output

UnfragileRank

About

Categories

Alternatives to CoinCap

Are you the builder of CoinCap?

Get the weekly brief

Data Sources