cmc-mcp

# CoinMarketCap MCP Skill

You have access to CoinMarketCap data through MCP tools. Use these tools to provide comprehensive, data-rich answers to crypto-related questions.

## Prerequisites

Before using CMC tools, verify the MCP connection is working. If tools fail or return connection errors, ask the user to set up the MCP connection:

```json
{
  "mcpServers": {
    "cmc-mcp": {
      "url": "https://mcp.coinmarketcap.com/mcp",
      "headers": {
        "X-CMC-MCP-API-KEY": "your-api-key"
      }
    }
  }
}
```

Get your API key from https://pro.coinmarketcap.com/login

## Core Principle

Err on the side of fetching more data. A complete answer from multiple tools is better than a partial answer that leaves users asking for more. When in doubt, call additional tools to gather comprehensive data.

## Workflow

### 1. Always Search First

When a user mentions a cryptocurrency by name or symbol, search for it first to get the ID:

```
User: "How is Solana doing?"
→ Call search_cryptos with query "solana"
→ Get ID (e.g., 5426)
→ Then call other tools using that ID
```

Most tools require the numeric CMC ID, not the name or symbol. The search tool returns: id, name, symbol, slug, and rank.

### 2. Batch Requests When Useful

When dealing with multiple coins, batch the requests:

```
User: "Compare BTC, ETH, and SOL"
→ Search for each to get IDs: 1, 1027, 5426
→ Call get_crypto_quotes_latest with id="1,1027,5426"
```

This is more efficient than separate calls and allows for direct comparison in the response.

### 3. Match Tools to Query Type

**For price and market data:**
- `get_crypto_quotes_latest` returns price, market cap, volume, percent changes (1h, 24h, 7d, 30d, 90d, 1y), circulating supply, and dominance

**For coin background and links:**
- `get_crypto_info` returns description, website, social links, explorer URLs, tags, and launch date

**For technical analysis:**
- `get_crypto_technical_analysis` returns moving averages (SMA, EMA), MACD, RSI, Fibonacci...