API ATLAS

Crypto & Blockchain: 97 free APIs

Exchange data, wallets, on-chain queries and smart-contract tooling. Every record below links to its own documentation page.

Listed
97
No auth needed
40
Full profiles
0

APIs in this category

97 of 97
btcnode.uk Bitcoin blockchain data, fees, mempool, SEC insider trades, Reddit sentiment. x402 micropayments for paid endpoints.
TWZRD Agent Intel Solana on-chain agent trust scoring via MCP; 4 free tools to score, resolve and verify AI agent wallets
Helium Helium is a global, distributed network of Hotspots that create public, long-range wireless coverage
Hirak Exchange Rates Exchange rates between 162 currency & 300 crypto currency update each 5 min, accurate, no limits
Ethplorer Ethereum tokens, balances, addresses, history of transactions, contracts, and custom structures
monerometrics Reorg-aware Monero (XMR) network metrics, mining-pool centralization and chain reorganizations
Zennet x402 pay-per-use APIs: Polymarket signals, CEX/DEX spreads, contract risk scores, gas oracle
CoinLobster Live executed whale trades across 15 exchanges and on-chain DEX with an unusualness radar
BTCGlobe Bitcoin height, fees, mempool and peer data served live from two self-hosted nodes
ClearTrace Cross-frontend DEX attribution and execution quality data across Ethereum and L2s
Bitcoin Halving Halving era, block reward, and schedule arithmetic for any Bitcoin block height
The Coin Analysis Live and historical cryptocurrency prices, market caps, volatility and drawdown
Nownodes Blockchain-as-a-service solution that provides high-quality connection via API
Alpha (Mossland) Korean crypto channel stance + RAG Q&A + canonical entity/topic/event store
Chainpoint Chainpoint is a global network for anchoring data to the Bitcoin blockchain
CoinNudge Current crypto market breadth, funding and open-interest research datasets
Bitmex Real-Time Cryptocurrency derivatives trading platform based in Hong Kong
Blockscout Multichain block explorer REST API (with Etherscan-compatible JSON-RPC)
PumpFunData Historical Pump.fun and PumpSwap AMM swap data as hourly Parquet files
DefiLlama Open and transparent DeFi data, TVL, coin prices, volumes, and yields
0x API for querying token and pool stats across various liquidity pools
NovaDax NovaDAX API to access all market data, trading management endpoints
BtcTurk Real-time cryptocurrency data, graphs and API that allows buy&sell
The Graph Indexing protocol for querying networks like Ethereum with GraphQL
Block Lottos On-chain lottery, draw history, jackpot and advertising endpoints
Solana JSON RPC Provides various endpoints to interact with the Solana Blockchain
Brave NewCoin Real-time and historic crypto data from more than 200+ exchanges
Nomics Historical and realtime cryptocurrency prices and market data
Watchdata Provide simple and reliable API access to Ethereum blockchain
BitcoinCharts Financial and Technical Data related to the Bitcoin Network
CoinDesk CoinDesk's Bitcoin Price Index (BPI) in multiple currencies
HostDeFi Free A+–F token-safety grades across Solana and EVM chains
Gateio API provides spot, margin and futures trading operations
BlazePhoenix On-chain DEX aggregator quotes and route execution data
CoinGecko Cryptocurrency Price, Market, and Developer/Social Data
Coinigy Interacting with Coinigy Accounts and Exchange Directly
CoinCap Real time Cryptocurrency prices through a RESTful API
Messari Provides API endpoints for thousands of crypto assets
Binance Exchange for Trading Cryptocurrencies based in China
CoinAPI All Currency Exchanges integrate under a single api
Coinbase Bitcoin, Bitcoin Cash, Litecoin and Ethereum Prices
Mempool Bitcoin API Service focusing on the transaction fee
Steem Blockchain-based blogging and social media website
Bitcambio Get the list of all traded assets in the exchange
Bybit Cryptocurrency data feed and algorithmic trading
Indodax Trade your Bitcoin and other assets with rupiah
VALR Cryptocurrency Exchange based in South Africa
Chainlink Build hybrid smart contracts with Chainlink
OKEx Cryptocurrency exchange based in Seychelles
Block Bitcoin Payment, Wallet & Transaction Data
Nexchange Automated cryptocurrency exchange service
Coinlore Cryptocurrencies prices, volume and more
Huobi Seychelles based cryptocurrency exchange
Bittrex Next Generation Crypto Trading Platform
ZMOK Ethereum JSON RPC API and Web3 provider
1inch API for querying decentralize exchange
dYdX Decentralized cryptocurrency exchange
EXMO Cryptocurrencies exchange based in UK
Walltime To retrieve Walltime's market info
Mexc Cryptocurrency info, place order
Gemini Cryptocurrencies Exchange

Rows marked ↗ have no reference page of their own — the source registry did not provide enough to write one — so they link straight to the provider's documentation.

Authentication

How the 97 records in this category authenticate callers. Values come straight from the source registries; records the sources do not describe are counted as unknown rather than guessed.

  • API key 57
  • No authentication 40

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