24 APIs in this category · last checked 2 October 2026
24
APIs listed
4
need no API key (17%)
4
CORS enabled (17%)
24
HTTPS (100%)
This directory lists 24 cryptocurrency APIs. 1 of them require no API key and support CORS, so you can call them directly from browser JavaScript with no backend and no sign-up. Every entry shows whether it needs authentication, serves over HTTPS and allows cross-origin requests, so you can pick one that fits your stack before you read a single doc page.
Provides trading pairs, order books, and trade history for Bitcambio, a Brazilian cryptocurrency exchange. The public market data endpoints work without registration or an API key. Public market endpoints need no signup or key. Private trading endpoints require a key. Rate limits are not published.
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1inch
Aggregates swap rates and liquidity across many blockchains via the 1inch Business portal, covering swap, orderbook, spot price, token, and gas price data. The old 1inch.io endpoints are retired. Moved from 1inch.io to business.1inch.com. Requires a developer account and API key. Free and paid tiers exist.
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0x
Powers token swaps by aggregating liquidity from over 150 sources across EVM chains plus Solana, Tron, and HyperCore through one trading API. Auth needs a key in the 0x-api-key header. Free API key available through signup. Rate limits scale with plan tier and are not fully published.
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apilayer coinlayer
Delivers real time and historical exchange rates for over 385 cryptocurrencies across 25 exchanges with data back to 2011. Signup needs an API key but no credit card for the free plan. Free plan available with no credit card required at signup. Monthly call limits are not detailed on the site.
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blockfrost Cardano
Gives programmatic access to Cardano mainnet and testnet data, including blocks, transactions, and contract queries, without running your own node. Each project authenticates with its own API key. Free tier available at signup. Daily request limits are set per project tier in the dashboard.
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Binance
Covers Binance spot trading, market data streams, and account management through REST, WebSocket, and FIX access, plus a free testnet for practice. Authenticated endpoints need an API key and secret. Free to use with a Binance account. Rate limits are weight based and vary per endpoint.
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Bybit
Unifies spot, derivatives, and options trading on Bybit under one v5 API, with a demo trading mode for testing strategies without real funds. Authenticated calls need an API key and request signature. Free to use with a Bybit account. Rate limits depend on account tier and endpoint type.
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Coinbase
Connects to Coinbase wallets, accounts, and payment flows for buying, selling, and transferring cryptocurrency for users. OAuth or API key authentication is required depending on the product used. Requires a Coinbase developer account; a free sandbox exists for testing. Rate limits vary by endpoint and are not listed publicly.
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Bitfinex
Rebuilds core Bitfinex exchange functions including trading, balances, order history, and streaming market data over REST and WebSocket. Docs recommend WebSocket over REST to avoid rate limits. Free to use with a Bitfinex account. WebSocket allows up to five authenticated connections per 15 seconds.
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CoinMarketCap
Tracks prices, market cap, and exchange data for more than 50 million tokens across more than 900 exchanges, with 92 endpoints for quotes and OHLCV data. The free Basic plan has call limits. Free Basic plan gives 15,000 call credits per month at 50 requests per minute. A keyless endpoint exists for quick testing.
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CryptoCompare
Supplies current and historical cryptocurrency prices, order books, and news aggregated from many exchanges for comparison and analytics. The public min API endpoint works without a paid plan. Free tier available. Some endpoints return 401 without a key. Rate limits are enforced per plan and not fully published.
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Huobi
Covers spot trading, margin trading, deposits, withdrawals, and account management on the Huobi exchange over REST and WebSocket. Private calls use HMAC SHA256 signed requests with a secret key. Free to use with a Huobi account. Rate limits apply per user ID across all of that user's API keys.
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Bitmex
Provides real time and historical market data plus order management for BitMEX cryptocurrency derivatives and perpetual swap contracts. Authenticated trading calls require an API key and secret pair. Free to use with a BitMEX account. Rate limits scale with account verification level.
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OKX
Covers spot, margin, and derivatives trading plus market data on OKX, the exchange formerly branded as OKEx, through REST and WebSocket v5 endpoints. Requests use HMAC SHA256 with key and passphrase. Free to use with an OKX account. Private REST limits apply per user ID and vary by endpoint.
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Brave NewCoin
Indexes cryptocurrency market prices, trade volume, and market capitalization alongside news and analytics across many exchanges. Authentication uses OAuth2 client credentials, not a simple key. Access requires registering through the developer portal. Pricing and free tier limits are not published on the docs site.
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WorldCoinIndex
Returns cryptocurrency ticker prices, market data, and 24 hour trading volume converted into major fiat currencies, updated every five minutes. The service is free to use once you request an API key. Free API key with no stated credit card requirement. Limited to 70 requests per hour per key and IP address.
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BtcTurk
Gives access to BtcTurk market data, order books, and trading operations for the Turkish cryptocurrency exchange over a REST API. An API key is required for authenticated trading endpoints only. Free to use with a BtcTurk account. Rate limits are not detailed in the public docs.
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Blockchain
Explores wallet balances, transactions, and network stats across Bitcoin, Bitcoin Cash, Ethereum, and Solana through Blockchain.com's gateway. Public endpoints need no key; paid ones bill per call. Public explorer endpoints are free with no key. Paid endpoints cost 0.001 to 0.003 dollars per call via x402.
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CoinAPI
Unifies real time and historical market data, exchange rates, and institutional indices from many cryptocurrency exchanges into one format. Separate products cover bulk historical files and execution. Free developer plan available. Exact call limits and credit card requirements are not detailed on the public docs page.
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Solana JSON RPC
Reads Solana network state, submits transactions, simulates execution, and subscribes to live updates over HTTP and WebSocket. Public cluster endpoints are shared infrastructure, not for production. No API key needed for public clusters, but expect 429 and 403 errors under load. Production use needs a paid RPC provider.
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CoinGecko
Delivers market prices, historical data, onchain DEX activity, and NFT data for more than 47 million tokens across over 220 networks. The free Demo plan allows 10,000 calls per month with no card. Free Demo plan gives 100 calls per minute and 10,000 calls per month. Paid plans start at 35 dollars monthly.
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VALR
Handles market data, order execution, and withdrawals for 60 plus cryptocurrencies on the South African VALR exchange over REST and WebSocket. Requests are signed with HMAC SHA512 over HTTPS only. Free to use with a VALR account. Limits run up to 2,000 requests per minute per key and 1,200 per minute per IP.
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Kraken
Covers Kraken spot trading, derivatives, OTC, custody, and crypto payments through REST, WebSocket, and FIX access points. Responses return JSON with separate result and error fields for easy parsing. Free to use with a Kraken account. Rate limits depend on verification tier and are tracked per API key.
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Alchemy Ethereum
Runs Ethereum node infrastructure as a service with enhanced JSON RPC methods plus indexed data for portfolios, transfers, prices, and NFTs. A free tier exists, with paid tiers for more throughput. Free tier available for building and testing. Usage limits are measured in compute units per plan.
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Best Cryptocurrency APIs for Developers
A cryptocurrency API allows developers to fetch real-time prices, historical market data, trading pair information, and portfolio metrics for Bitcoin, Ethereum, and thousands of altcoins. These APIs power crypto trackers, trading bots, and financial dashboards.
CoinGecko and CoinMarketCap are the easiest starting points for market data, both offering free tiers that need no credit card and cover tens of millions of tokens across hundreds of exchanges.
Binance, Kraken, and Bybit suit real trading features, each documenting signed REST and WebSocket access for spot and derivatives markets with free developer accounts.
For onchain work, 0x aggregates swap liquidity across EVM chains plus Solana, while the Solana JSON RPC suits direct chain reads, though its public endpoints are rate limited.
The biggest pitfall here is churn: exchanges rebrand, get acquired, or shut down faster than almost any other API niche, so confirm a provider is still trading before you build on it.
What to check before you pick one
Coin coverage: Ensure the API covers all tokens your application needs, including smaller altcoins and DeFi tokens.
Historical data depth: For backtesting trading strategies, you need APIs that provide years of historical OHLCV data.
WebSocket streaming: Real-time price updates via WebSocket are essential for live trading interfaces.
Frequently Asked Questions
What are cryptocurrency APIs?
Cryptocurrency APIs provide real-time and historical price data, order book information, trading functionality, wallet management, and market cap rankings for thousands of digital assets.
Is CoinGecko API free?
CoinGecko offers a free public API that covers price data, market cap, volume, and historical charts for over 10,000 cryptocurrencies with a rate limit of 10-30 calls per minute.
Can I get real-time Bitcoin prices through an API?
Yes. APIs like CoinGecko, CoinMarketCap, and Binance provide real-time Bitcoin price data in multiple fiat currencies with sub-second update frequencies on paid tiers.