crypto-market-data

Crypto Market Data

Retrieve real-time and historical crypto market data using free, no-auth APIs.

APIs

CoinGecko (Free, no auth for basic endpoints)

Base: https://api.coingecko.com/api/v3

Current price (up to 250 IDs per call):

web_fetch url="https://api.coingecko.com/api/v3/simple/price?ids=bitcoin,ethereum,solana&vs_currencies=usd&include_24hr_change=true&include_market_cap=true"

Token detail (includes description, links, market data):

web_fetch url="https://api.coingecko.com/api/v3/coins/bitcoin"

Market list (top N by market cap, paginated):

web_fetch url="https://api.coingecko.com/api/v3/coins/markets?vs_currency=usd&order=market_cap_desc&per_page=50&page=1&sparkline=false"

Trending tokens (top 7 by search volume):

web_fetch url="https://api.coingecko.com/api/v3/search/trending"

Price history (daily OHLC, max 365 days free):

web_fetch url="https://api.coingecko.com/api/v3/coins/bitcoin/ohlc?vs_currency=usd&days=30"

Search by name/symbol:

web_fetch url="https://api.coingecko.com/api/v3/search?query=pepe"

Categories (list all categories with market data):

web_fetch url="https://api.coingecko.com/api/v3/coins/categories"

Rate limit: ~30 req/min (free). Use include_market_cap=true to avoid extra calls. See references/coingecko-ids.md for top 200 token IDs.

DexPaprika (Free, no auth)

Base: https://api.dexpaprika.com

Token price on DEXes (by chain + address):

web_fetch url="https://api.dexpaprika.com/networks/ethereum/tokens/0xdac17f958d2ee523a2206206994597c13d831ec7"

Top DEX pools:

web_fetch url="https://api.dexpaprika.com/networks/ethereum/pools?sort=volume_usd&order=desc&limit=20"

Supported networks:

web_fetch url="https://api.dexpaprika.com/networks"

OHLCV for a pool:

web_fetch url="https://api.dexpaprika.com/networks/ethereum/pools/{pool_address}/ohlcv?interval=1d&limit=30"

Fear & Greed Index (Free, no auth)

web_fetch url="https://api.alternative.me/fng/?limit=1"

Response: { "data": [{ "value": "73", "value_classification": "Greed", "timestamp": "..." }] }

Historical (last 30 days):

web_fetch url="https://api.alternative.me/fng/?limit=30"

DefiLlama (Free, no auth)

Base: https://api.llama.fi

Total TVL across all protocols:

web_fetch url="https://api.llama.fi/v2/historicalChainTvl"

TVL by chain:

web_fetch url="https://api.llama.fi/v2/chains"

Protocol TVL + details:

web_fetch url="https://api.llama.fi/protocol/aave"

Top protocols by TVL:

web_fetch url="https://api.llama.fi/protocols"

Stablecoins market cap:

web_fetch url="https://stablecoins.llama.fi/stablecoins?includePrices=true"

DEX volumes (24h):

web_fetch url="https://api.llama.fi/overview/dexs?excludeTotalDataChart=true&excludeTotalDataChartBreakdown=true"

Usage Tips

• Always use CoinGecko IDs (not symbols) — e.g., bitcoin not BTC. See references for mapping.
• For on-chain DEX data (price by contract address), use DexPaprika.
• For protocol-level TVL and DeFi analytics, use DefiLlama.
• Fear & Greed Index is BTC-focused; mention this when reporting sentiment.
• Combine CoinGecko trending + Fear & Greed for a quick market overview.