Crypto Data Sources

Introduction

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CoinGecko — The Broadest Market Data Layer

CoinGecko is the most comprehensive free source for crypto market data, tracking over 30 million tokens across 250+ blockchain networks and 1,700+ exchanges. It is used by MetaMask, Coinbase, Etherscan and thousands of other applications as their underlying data provider — which gives some indication of its reliability and coverage.

For a trader or researcher, CoinGecko is the natural starting point for any market question.

What You Can Do on CoinGecko

Market overview and price data. Every listed token has a dedicated page showing real-time price, market cap, 24H volume, circulating supply, fully diluted valuation, all-time high and low, and price charts across multiple timeframes. The global market overview dashboard shows total market cap, BTC dominance, DeFi share, and derivatives volume.

Exchange rankings. CoinGecko ranks centralised and decentralised exchanges by adjusted volume, with trust scores that attempt to filter out wash trading. For each exchange, you can see trading pairs, 24H volume per pair, and liquidity depth — useful for assessing where to route orders or where genuine volume lives.

DeFi and on-chain data. The on-chain section covers liquidity pools, DEX trading volumes, token contract addresses across chains, and newly listed tokens. You can filter by blockchain and find the most active pools on any network.

Categories and sectors. CoinGecko groups tokens into over 500 categories — Layer 1s, DeFi, AI, RWA, liquid staking, gaming, and more. Each category page shows aggregate market cap and performance, making it easy to assess which sectors are leading or lagging.

Derivatives and funding rates. CoinGecko tracks perpetual futures markets across major exchanges, showing open interest, funding rates and liquidation data. Useful for a quick read on market sentiment without needing a dedicated derivatives platform.

Token pages as research starting points. Every token page links to the project’s website, whitepaper, GitHub, socials, and contract addresses. It also shows major holders (where on-chain data is available) and upcoming token unlocks. A good token page gives you the full picture in one place before going deeper.

Trending and top movers. The trending section shows the most-searched tokens on CoinGecko over 24H — a rough sentiment indicator for retail interest. Top gainers and losers across different timeframes are also available.

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CoinGecko API — Data Infrastructure for Developers

Beyond the website, CoinGecko’s API is one of the most widely used data feeds in the crypto industry. It covers the same data as the website — prices, OHLCV, market caps, exchange data, on-chain pools — and makes it accessible programmatically over REST.

Free tier (Demo plan): – 30 calls per minute – Access to real-time prices, market caps, exchange data – 1 year of historical data – No credit card required — sign up at coingecko.com/en/api

Paid tiers unlock higher rate limits, longer historical data, priority support and additional endpoints including on-chain DEX data.

Key API Endpoints

import requests

BASE = "https://api.coingecko.com/api/v3"
HEADERS = {"x-cg-demo-api-key": "YOUR_API_KEY"}  # Free demo key from coingecko.com/en/api

# --- Current price for multiple coins ---
def get_prices(coin_ids: list, vs_currency: str = "usd") -> dict:
    r = requests.get(f"{BASE}/simple/price", headers=HEADERS, params={
        "ids": ",".join(coin_ids),
        "vs_currencies": vs_currency,
        "include_24hr_change": "true",
        "include_market_cap": "true",
    })
    return r.json()

prices = get_prices(["bitcoin", "ethereum", "solana"])
for coin, data in prices.items():
    print(f"{coin}: ${data['usd']:,.2f}  24h: {data['usd_24h_change']:.2f}%")

# --- Top coins by market cap ---
def get_markets(page: int = 1, per_page: int = 50) -> list:
    r = requests.get(f"{BASE}/coins/markets", headers=HEADERS, params={
        "vs_currency": "usd",
        "order": "market_cap_desc",
        "per_page": per_page,
        "page": page,
        "sparkline": "false",
    })
    return r.json()

top_coins = get_markets()
for c in top_coins[:5]:
    print(f"#{c['market_cap_rank']}  {c['symbol'].upper():<6} ${c['current_price']:>10,.2f}  MCap: ${c['market_cap']:,.0f}")

# --- Historical OHLCV data ---
def get_ohlcv(coin_id: str, vs_currency: str, days: int) -> list:
    """Returns OHLCV candles. days=1 → hourly, days>1 → daily candles."""
    r = requests.get(f"{BASE}/coins/{coin_id}/ohlc", headers=HEADERS, params={
        "vs_currency": vs_currency,
        "days": days,
    })
    return r.json()  # [[timestamp, open, high, low, close], ...]

ohlcv = get_ohlcv("bitcoin", "usd", 30)
print(f"Fetched {len(ohlcv)} OHLCV candles for BTC (30 days)")

# --- Global market stats ---
def get_global() -> dict:
    r = requests.get(f"{BASE}/global", headers=HEADERS)
    data = r.json()["data"]
    print(f"Total market cap: ${data['total_market_cap']['usd']:,.0f}")
    print(f"BTC dominance:    {data['market_cap_percentage']['btc']:.1f}%")
    print(f"24H volume:       ${data['total_volume']['usd']:,.0f}")
    return data

get_global()

# --- Trending coins (most searched last 24H) ---
def get_trending() -> list:
    r = requests.get(f"{BASE}/search/trending", headers=HEADERS)
    return r.json()["coins"]

for item in get_trending()[:5]:
    coin = item["item"]
    print(f"Trending: {coin['name']} ({coin['symbol']})  Rank #{coin['market_cap_rank']}")

On-Chain DEX Data (Paid Tier)

The paid API adds 20+ on-chain endpoints covering DEX pools and token contract data across all major chains:

# Fetch top liquidity pools on Arbitrum (paid API endpoint)
def get_top_pools(network: str = "arbitrum") -> list:
    r = requests.get(f"{BASE}/onchain/networks/{network}/pools", headers=HEADERS, params={
        "sort": "h24_volume_usd_desc",
        "page": 1,
    })
    return r.json().get("data", [])

# Fetch OHLCV for a specific pool by contract address
def get_pool_ohlcv(network: str, pool_address: str, timeframe: str = "hour") -> list:
    r = requests.get(
        f"{BASE}/onchain/networks/{network}/pools/{pool_address}/ohlcv/{timeframe}",
        headers=HEADERS
    )
    return r.json().get("data", {}).get("attributes", {}).get("ohlcv_list", [])

API documentation: docs.coingecko.com

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Other Essential Research Platforms

CoinMarketCap

CoinMarketCap (owned by Binance since 2020) is CoinGecko’s main competitor for general market data. Coverage is comparable — tens of thousands of tokens, exchange rankings, derivatives data — and for most users the two platforms are interchangeable for basic price and market cap queries.

Where CoinMarketCap has an edge: its Fear & Greed Index (a popular sentiment indicator) and its integration with Binance’s ecosystem. Where CoinGecko has an edge: generally considered more neutral (not owned by an exchange), broader on-chain data coverage, and a more developer-friendly API.

Best for: Cross-checking prices and market cap, Fear & Greed Index sentiment reading.

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Messari

Messari is the closest thing crypto has to a professional research terminal. It combines quantitative data with qualitative analysis — protocol profiles, sector reports, quarterly earnings-style breakdowns of protocol revenues, governance tracking, token unlock schedules, and fundraising data.

For anyone making investment decisions or evaluating protocols beyond surface-level metrics, Messari is essential. Its research section publishes in-depth analyst reports that are genuinely comparable to sell-side equity research in quality.

Key features: – Detailed protocol profiles with revenue, fees, usage metrics – Token unlock calendar — when and how much supply becomes liquid – Fundraising database — who raised, from whom, at what valuation – Sector-level analysis (DeFi, L1s, AI, RWA etc.) – AI-summarised news and governance updates – Screener for filtering tokens by on-chain metrics

Pricing: Free tier available; Pro subscription for full research access.

Best for: Deep fundamental research, token unlock monitoring, sector analysis, governance tracking.

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DefiLlama

DefiLlama is the authoritative source for DeFi protocol data. It tracks Total Value Locked (TVL) across every major DeFi protocol and blockchain, updated in real time, entirely free.

TVL is one of the most watched metrics in DeFi — it measures how much capital is deployed in a protocol’s smart contracts. Rising TVL suggests growing user trust and capital inflows; falling TVL suggests outflows or declining usage.

Beyond TVL, DefiLlama tracks protocol revenues and fees, stablecoin supplies by chain, DEX volumes, bridge flows, liquidations, and yield opportunities across protocols. The perps section (defillama.com/perps) shows trading volume rankings for all perpetual DEXs.

Key features: – TVL rankings by protocol and blockchain — all free – Revenue and fee data per protocol (useful for valuation) – Stablecoin tracker by chain and issuer – DEX volume rankings – Yield aggregator — compare yields across DeFi protocols – Perpetual DEX volume rankings

Best for: DeFi protocol analysis, TVL trends, identifying where capital is flowing across chains.

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TradingView

TradingView is the standard charting platform for technical analysis across crypto, equities, forex and commodities. It combines a powerful charting engine with a large community of published strategies and indicators.

For crypto specifically, TradingView aggregates price feeds from dozens of exchanges and allows you to chart any pair on any exchange. The Pine Script language lets you write custom indicators and backtest strategies directly in the browser — no local setup required.

Key features: – Professional charting across all asset classes – 100+ built-in technical indicators – Pine Script for custom indicators and strategy backtesting – Price alerts by email, SMS or push notification – Large public library of community indicators and strategies – Paper trading mode for testing strategies live

Pricing: Free tier with limited indicators; paid plans from ~$15/month for full access.

Best for: Technical analysis, charting, custom indicator development, strategy backtesting.

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Glassnode

Glassnode specialises in macro on-chain analytics — understanding the behaviour of the entire Bitcoin and Ethereum networks as aggregate systems rather than tracking individual wallets.

Its metrics cover long-term vs short-term holder behaviour, realised profit and loss distribution across the market, exchange reserve levels over time, miner activity, and supply in profit or loss. These metrics are most useful for understanding market cycle positioning — where in the bull/bear cycle the aggregate market appears to be.

Key features: – Long-term holder supply and realised price – Exchange reserves (BTC, ETH, stablecoins) over time – Realised cap and MVRV ratio (market cycle indicators) – STH vs LTH realised profit and loss – Miner outflows and reserve levels

Pricing: Free tier with limited metrics; Studio subscription for full access (~$39–$799/month).

Best for: Bitcoin and Ethereum market cycle analysis, on-chain macro signals.

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CryptoQuant

CryptoQuant focuses on exchange-level on-chain data — tracking what is flowing into and out of exchange wallets in real time. Where Glassnode takes a macro view, CryptoQuant is more operationally focused: exchange reserve changes, stablecoin inflows (often a leading indicator of buying pressure), miner-to-exchange flows, and funding rates across multiple venues.

CryptoQuant monitors over 500 exchanges and publishes community-written research alongside its data dashboards.

Key features: – Exchange reserve levels for BTC, ETH and major stablecoins – Stablecoin supply on exchanges as a buy-pressure indicator – Miner outflow tracking – Funding rate aggregates across exchanges – Community research and analyst alerts

Best for: Exchange flow analysis, stablecoin supply signals, short-term on-chain sentiment.

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Token Terminal

Token Terminal applies traditional financial analysis frameworks to crypto protocols — treating them as businesses with revenues, expenses, earnings and price-to-earnings ratios. It tracks protocol fees, revenue splits between the protocol treasury and token holders, and active user counts.

If you are used to equity valuation methods (P/E, P/S multiples, earnings growth), Token Terminal is the closest crypto equivalent. It makes it possible to compare protocol ”valuations” using consistent metrics across DeFi, L1s and other categories.

Pricing: Free tier; Pro from ~$350/month; API access on higher tiers.

Best for: Fundamental valuation of DeFi protocols, protocol revenue comparison, institutional-style analysis.

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Dune Analytics

Dune is a community-driven SQL platform that gives anyone access to raw on-chain data across 100+ blockchains. Users write SQL queries against indexed blockchain data and publish the results as shareable dashboards.

The community has built thousands of public dashboards covering exchange volumes, protocol metrics, whale wallet activity, NFT markets and more — most of them free. For anyone who wants to go beyond pre-built tools and ask a specific question about on-chain data, Dune is the answer.

Key features: – SQL access to raw on-chain data across 100+ chains – Thousands of free community dashboards – Python and API integration for pulling query results into your own tools – Build custom dashboards and share them

Best for: Custom on-chain analysis, accessing pre-built community dashboards, programmatic data access.

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Building a Research Stack

No single platform covers everything. The most effective research process combines sources by question type:

Question	Best source
What is the current price and market cap?	CoinGecko, CoinMarketCap
Which DeFi protocol is gaining TVL?	DefiLlama
What is a token’s fundamental profile?	Messari
Is the market in accumulation or distribution?	Glassnode, CryptoQuant
Where are large amounts of stablecoins moving?	CryptoQuant
How does a protocol compare on revenue?	Token Terminal
What does the price chart look like technically?	TradingView
Who holds this token — and are they selling?	Nansen, Arkham, Bubblemaps
I need price data in my code	CoinGecko API
I need to answer a specific on-chain question	Dune Analytics

A practical free starting stack: CoinGecko (prices and market data) + DefiLlama (DeFi protocol metrics) + TradingView (charting) + Glassnode free tier (macro on-chain). Add Messari for deeper fundamental research and Nansen or Arkham when wallet-level intelligence becomes relevant.

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Crypto Research Sources — Quick Reference

Platform	Primary Use	Free Tier	API Available	Best For
CoinGecko	Prices, market data, exchange rankings	Yes (generous)	Yes (30 calls/min free)	Starting point for any market question; developer data feeds
CoinMarketCap	Prices, market data, sentiment	Yes	Yes	Fear & Greed Index, cross-checking
Messari	Fundamental research, token unlocks	Limited	Yes (paid)	Deep protocol analysis, sector reports
DefiLlama	DeFi TVL, protocol revenue, DEX volume	Yes (fully free)	Yes	DeFi protocol comparison, capital flow tracking
TradingView	Charting, technical analysis	Yes (limited)	No	Charts, indicators, Pine Script strategies
Glassnode	Macro on-chain, BTC/ETH cycle	Limited	Yes (paid)	Market cycle positioning, LTH/STH signals
CryptoQuant	Exchange flows, stablecoin supply	Limited	Yes (paid)	Short-term exchange flow signals
Token Terminal	Protocol revenue, P/E valuation	Yes	Yes (paid)	Fundamental valuation of DeFi protocols
Dune Analytics	Custom SQL on-chain queries	Yes	Yes	Any custom on-chain analysis

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Key Takeaways

• CoinGecko is the broadest and most accessible starting point — covering 30 million+ tokens, 1,700+ exchanges, and DeFi data, with a generous free API for developers
• The CoinGecko API (free tier: 30 calls/minute) provides prices, market caps, OHLCV, exchange data and on-chain pool data programmatically — one of the best free data feeds in crypto
• DefiLlama is the go-to for DeFi protocol metrics — TVL, revenue, DEX volume — fully free
• Messari provides the deepest fundamental research, including token unlocks and fundraising data
• Glassnode and CryptoQuant cover on-chain macro signals and exchange flows respectively
• TradingView is the standard for charting and technical analysis across all asset classes
• No single tool covers everything — the best research process combines sources by the question being asked

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Useful Links

• CoinGecko — API Documentation — API Pricing
• CoinMarketCap
• Messari
• DefiLlama — Perps Rankings
• TradingView
• Glassnode
• CryptoQuant
• Token Terminal
• Dune Analytics

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For tracking specific wallet movements and whale activity, see our Wallet Tracking page. For building your own data pipeline using the CoinGecko API alongside a TimescaleDB database, see our Build Your Own Trading Application page.