crypto-tracker

Crypto Tracker

Real-time cryptocurrency market data via free APIs. No API keys needed.

Quick Commands

Price Check

scripts/crypto.sh price bitcoin ethereum solana

Market Overview

scripts/crypto.sh market

Trending Coins

scripts/crypto.sh trending

Fear & Greed Index

scripts/crypto.sh fear

DeFi TVL Rankings

scripts/crypto.sh defi

Top Meme Coins

scripts/crypto.sh memes

Coin Details

scripts/crypto.sh info bitcoin

📈 RSI Indicator (14-day)

scripts/crypto.sh rsi bitcoin
scripts/crypto.sh rsi ethereum

Calculates 14-day RSI from CoinGecko historical prices. Shows overbought (>70) / oversold (<30) / neutral signals with trading suggestions.

📊 Moving Average Analysis

scripts/crypto.sh ma bitcoin
scripts/crypto.sh ma solana

Calculates 7/14/30-day moving averages. Detects golden cross (金叉) / death cross (死叉) patterns and overall trend direction.

🌾 DeFi Yield Comparison

scripts/crypto.sh defi-yield

Fetches top 20 high-yield DeFi pools (TVL > $1M) from DefiLlama. Shows protocol, pool, APY, TVL, and chain. Sorted by APY.

⛽ Ethereum Gas Tracker

scripts/crypto.sh gas

Shows current Ethereum gas prices (low/medium/fast) with transaction cost estimates and gas-saving tips. Falls back to reference guide if API is unavailable.

API Reference

All endpoints are free, no auth required. Rate limit: ~10-30 req/min.

CoinGecko (prices, trending, market data)

• Base: https://api.coingecko.com/api/v3
• Price: /simple/price?ids={ids}&vs_currencies=usd&include_24hr_change=true
• Trending: /search/trending
• Global: /global
• Markets: /coins/markets?vs_currency=usd&order=market_cap_desc&per_page=20
• Coin detail: /coins/{id}
• Categories: /coins/categories
• Memes: /coins/markets?vs_currency=usd&category=meme-token&order=volume_desc&per_page=20

DefiLlama (DeFi data)

• Base: https://api.llama.fi
• TVL: /protocols
• Chain TVL: /v2/chains
• Yields: https://yields.llama.fi/pools (high-yield pool data)

Fear & Greed Index

• https://api.alternative.me/fng/

Etherscan (Gas prices)

• Gas Oracle: https://api.etherscan.io/api?module=gastracker&action=gasoracle

Output Formats

Default: human-readable table. Add --json for raw JSON output.

Notes

• CoinGecko free tier: ~30 calls/min. Add 2s delay between batch requests.
• Coin IDs use CoinGecko slugs (e.g., bitcoin, ethereum, solana).
• For historical data: /coins/{id}/market_chart?vs_currency=usd&days={days}