CoinGecko CLI

Overview

Query cryptocurrency market data using the official CoinGecko CLI (cg). The CLI wraps the CoinGecko V3 API with structured JSON output, a dry-run mode, and a self-describing command catalog — designed to be driven by agents.

Key capabilities:

• Current prices by coin ID or symbol (cg price)
• Top coins by market cap with filters and CSV export (cg markets)
• Coin search with fuzzy matching (cg search)
• Trending coins, NFTs, and categories (cg trending)
• Historical price snapshots, time series, and OHLC (cg history)
• Top gainers/losers over configurable durations (cg top-gainers-losers, paid)

Out of scope — cg does not support contract-address price lookups, global market stats (total market cap, BTC/ETH dominance), NFT detail endpoints, GeckoTerminal on-chain DEX queries, or token logo metadata. Fall back to WebFetch against docs.coingecko.com/llms.txt for those.

Prerequisites