Best Free APIs Directory
Find free APIs for AI, weather, finance, and development projects in our curated directory.
The Best Free APIs for Developers
Find the perfect free API for your next project. Our curated directory features hundreds of free APIs across AI, weather, finance, and developer tools - all verified to offer genuine free tiers without credit card requirements.
Whether you need AI APIs for natural language processing, Weather APIs for forecasts and historical data, Finance APIs for stock and crypto data, or Developer APIs for GitHub integration and more - we have you covered.
Pro tip: Each API card includes a copy button for the endpoint URL. Click to copy and integrate into your projects quickly.
Showing 193-240 of 1467 APIs
BitcoinAverage
Cryptocurrency
Digital Asset Price Data for the blockchain industry
BitcoinCharts
Cryptocurrency
Financial and Technical Data related to the Bitcoin Network
Bitmex
Cryptocurrency
Real-Time Cryptocurrency derivatives trading platform based in Hong Kong
blockfrost Cardano
Cryptocurrency
Interaction with the Cardano mainnet and several testnets
Brave NewCoin
Cryptocurrency
Real-time and historic crypto data from more than 200+ exchanges
BtcTurk
Cryptocurrency
Real-time cryptocurrency data, graphs and API that allows buy&sell
CoinAPI
Cryptocurrency
All Currency Exchanges integrate under a single api
Coinbase
Cryptocurrency
Bitcoin, Bitcoin Cash, Litecoin and Ethereum Prices
CoinDesk
Cryptocurrency
CoinDesk's Bitcoin Price Index (BPI) in multiple currencies
CoinGecko
Cryptocurrency
Cryptocurrency Price, Market, and Developer/Social Data
Coinigy
Cryptocurrency
Interacting with Coinigy Accounts and Exchange Directly
CryptAPI
Cryptocurrency
CryptAPI is an API listed in the Cryptocurrency category that provides access to cryptocurrency Payment Processor. It is intended for developers who want to integrate this type of cryptocurrency data or functionality into websites, mobile applications, dashboards, automation workflows, research projects, prototypes, or backend services without building the underlying data source or service from scratch. From the supplied API metadata, the supplied listing indicates that authentication is not required; HTTPS support is listed as available. This makes CryptAPI a useful integration candidate when a project needs cryptocurrency Payment Processor through a programmatic interface. Because API capabilities, quotas, authentication rules, endpoints, and availability can change over time, the provider documentation should be treated as the current technical reference.
CryptingUp
Cryptocurrency
CryptingUp is an API listed in the Cryptocurrency category that provides access to cryptocurrency data. It is intended for developers who want to integrate this type of cryptocurrency data or functionality into websites, mobile applications, dashboards, automation workflows, research projects, prototypes, or backend services without building the underlying data source or service from scratch. From the supplied API metadata, the supplied listing indicates that authentication is not required; HTTPS support is listed as available. This makes CryptingUp a useful integration candidate when a project needs cryptocurrency data through a programmatic interface. Because API capabilities, quotas, authentication rules, endpoints, and availability can change over time, the provider documentation should be treated as the current technical reference.
CryptoCompare
Cryptocurrency
CryptoCompare is an API listed in the Cryptocurrency category that provides access to cryptocurrencies Comparison. It is intended for developers who want to integrate this type of cryptocurrency data or functionality into websites, mobile applications, dashboards, automation workflows, research projects, prototypes, or backend services without building the underlying data source or service from scratch. From the supplied API metadata, the supplied listing indicates that authentication is not required; HTTPS support is listed as available. This makes CryptoCompare a useful integration candidate when a project needs cryptocurrencies Comparison through a programmatic interface. Because API capabilities, quotas, authentication rules, endpoints, and availability can change over time, the provider documentation should be treated as the current technical reference.
CryptoMarket
Cryptocurrency
CryptoMarket is an API listed in the Cryptocurrency category that provides access to cryptocurrencies Trading platform. It is intended for developers who want to integrate this type of cryptocurrency data or functionality into websites, mobile applications, dashboards, automation workflows, research projects, prototypes, or backend services without building the underlying data source or service from scratch. From the supplied API metadata, the supplied listing identifies apiKey as the authentication method; HTTPS support is listed as available; CORS is listed as Yes. This makes CryptoMarket a useful integration candidate when a project needs cryptocurrencies Trading platform through a programmatic interface. Because API capabilities, quotas, authentication rules, endpoints, and availability can change over time, the provider documentation should be treated as the current technical reference.
Cryptonator
Cryptocurrency
Cryptonator is an API listed in the Cryptocurrency category that provides access to cryptocurrencies Exchange Rates. It is intended for developers who want to integrate this type of cryptocurrency data or functionality into websites, mobile applications, dashboards, automation workflows, research projects, prototypes, or backend services without building the underlying data source or service from scratch. From the supplied API metadata, the supplied listing indicates that authentication is not required; HTTPS support is listed as available. This makes Cryptonator a useful integration candidate when a project needs cryptocurrencies Exchange Rates through a programmatic interface. Because API capabilities, quotas, authentication rules, endpoints, and availability can change over time, the provider documentation should be treated as the current technical reference.
dYdX
Cryptocurrency
dYdX is an API listed in the Cryptocurrency category that provides access to decentralized cryptocurrency exchange. It is intended for developers who want to integrate this type of cryptocurrency data or functionality into websites, mobile applications, dashboards, automation workflows, research projects, prototypes, or backend services without building the underlying data source or service from scratch. From the supplied API metadata, the supplied listing identifies apiKey as the authentication method; HTTPS support is listed as available. This makes dYdX a useful integration candidate when a project needs decentralized cryptocurrency exchange through a programmatic interface. Because API capabilities, quotas, authentication rules, endpoints, and availability can change over time, the provider documentation should be treated as the current technical reference.
Ethplorer
Cryptocurrency
Ethplorer is an API listed in the Cryptocurrency category that provides access to ethereum tokens, balances, addresses, history of transactions, contracts, and custom structures. It is intended for developers who want to integrate this type of cryptocurrency data or functionality into websites, mobile applications, dashboards, automation workflows, research projects, prototypes, or backend services without building the underlying data source or service from scratch. From the supplied API metadata, the supplied listing identifies apiKey as the authentication method; HTTPS support is listed as available. This makes Ethplorer a useful integration candidate when a project needs ethereum tokens, balances, addresses, history of transactions, contracts, and custom structures through a programmatic interface. Because API capabilities, quotas, authentication rules, endpoints, and availability can change over time, the provider documentation should be treated as the current technical reference.
EXMO
Cryptocurrency
EXMO is an API listed in the Cryptocurrency category that provides access to cryptocurrencies exchange based in UK. It is intended for developers who want to integrate this type of cryptocurrency data or functionality into websites, mobile applications, dashboards, automation workflows, research projects, prototypes, or backend services without building the underlying data source or service from scratch. From the supplied API metadata, the supplied listing identifies apiKey as the authentication method; HTTPS support is listed as available. This makes EXMO a useful integration candidate when a project needs cryptocurrencies exchange based in UK through a programmatic interface. Because API capabilities, quotas, authentication rules, endpoints, and availability can change over time, the provider documentation should be treated as the current technical reference.
FTX
Cryptocurrency
FTX is an API listed in the Cryptocurrency category that provides access to complete REST, websocket, and FTX APIs to suit your algorithmic trading needs. It is intended for developers who want to integrate this type of cryptocurrency data or functionality into websites, mobile applications, dashboards, automation workflows, research projects, prototypes, or backend services without building the underlying data source or service from scratch. From the supplied API metadata, the supplied listing identifies apiKey as the authentication method; HTTPS support is listed as available; CORS is listed as Yes. This makes FTX a useful integration candidate when a project needs complete REST, websocket, and FTX APIs to suit your algorithmic trading needs through a programmatic interface. Because API capabilities, quotas, authentication rules, endpoints, and availability can change over time, the provider documentation should be treated as the current technical reference.
Gateio
Cryptocurrency
Gateio is an API listed in the Cryptocurrency category that provides access to API provides spot, margin and futures trading operations. It is intended for developers who want to integrate this type of cryptocurrency data or functionality into websites, mobile applications, dashboards, automation workflows, research projects, prototypes, or backend services without building the underlying data source or service from scratch. From the supplied API metadata, the supplied listing identifies apiKey as the authentication method; HTTPS support is listed as available. This makes Gateio a useful integration candidate when a project needs API provides spot, margin and futures trading operations through a programmatic interface. Because API capabilities, quotas, authentication rules, endpoints, and availability can change over time, the provider documentation should be treated as the current technical reference.
Gemini
Cryptocurrency
Gemini is an API listed in the Cryptocurrency category that provides access to cryptocurrencies Exchange. It is intended for developers who want to integrate this type of cryptocurrency data or functionality into websites, mobile applications, dashboards, automation workflows, research projects, prototypes, or backend services without building the underlying data source or service from scratch. From the supplied API metadata, the supplied listing indicates that authentication is not required; HTTPS support is listed as available. This makes Gemini a useful integration candidate when a project needs cryptocurrencies Exchange through a programmatic interface. Because API capabilities, quotas, authentication rules, endpoints, and availability can change over time, the provider documentation should be treated as the current technical reference.
Hirak Exchange Rates
Cryptocurrency
Hirak Exchange Rates is an API listed in the Cryptocurrency category that provides access to exchange rates between 162 currency & 300 crypto currency update each 5 min, accurate, no limits. It is intended for developers who want to integrate this type of cryptocurrency data or functionality into websites, mobile applications, dashboards, automation workflows, research projects, prototypes, or backend services without building the underlying data source or service from scratch. From the supplied API metadata, the supplied listing identifies apiKey as the authentication method; HTTPS support is listed as available. This makes Hirak Exchange Rates a useful integration candidate when a project needs exchange rates between 162 currency & 300 crypto currency update each 5 min, accurate, no limits through a programmatic interface. Because API capabilities, quotas, authentication rules, endpoints, and availability can change over time, the provider documentation should be treated as the current technical reference.
Huobi
Cryptocurrency
Huobi is an API listed in the Cryptocurrency category that provides access to seychelles based cryptocurrency exchange. It is intended for developers who want to integrate this type of cryptocurrency data or functionality into websites, mobile applications, dashboards, automation workflows, research projects, prototypes, or backend services without building the underlying data source or service from scratch. From the supplied API metadata, the supplied listing identifies apiKey as the authentication method; HTTPS support is listed as available. This makes Huobi a useful integration candidate when a project needs seychelles based cryptocurrency exchange through a programmatic interface. Because API capabilities, quotas, authentication rules, endpoints, and availability can change over time, the provider documentation should be treated as the current technical reference.
icy.tools
Cryptocurrency
icy.tools is an API listed in the Cryptocurrency category that provides access to graphQL based NFT API. It is intended for developers who want to integrate this type of cryptocurrency data or functionality into websites, mobile applications, dashboards, automation workflows, research projects, prototypes, or backend services without building the underlying data source or service from scratch. From the supplied API metadata, the supplied listing identifies apiKey as the authentication method; HTTPS support is listed as available. This makes icy.tools a useful integration candidate when a project needs graphQL based NFT API through a programmatic interface. Because API capabilities, quotas, authentication rules, endpoints, and availability can change over time, the provider documentation should be treated as the current technical reference.
Indodax
Cryptocurrency
Indodax is an API listed in the Cryptocurrency category that provides access to trade your Bitcoin and other assets with rupiah. It is intended for developers who want to integrate this type of cryptocurrency data or functionality into websites, mobile applications, dashboards, automation workflows, research projects, prototypes, or backend services without building the underlying data source or service from scratch. From the supplied API metadata, the supplied listing identifies apiKey as the authentication method; HTTPS support is listed as available. This makes Indodax a useful integration candidate when a project needs trade your Bitcoin and other assets with rupiah through a programmatic interface. Because API capabilities, quotas, authentication rules, endpoints, and availability can change over time, the provider documentation should be treated as the current technical reference.
INFURA Ethereum
Cryptocurrency
INFURA Ethereum is an API listed in the Cryptocurrency category that provides access to interaction with the Ethereum mainnet and several testnets. It is intended for developers who want to integrate this type of cryptocurrency data or functionality into websites, mobile applications, dashboards, automation workflows, research projects, prototypes, or backend services without building the underlying data source or service from scratch. From the supplied API metadata, the supplied listing identifies apiKey as the authentication method; HTTPS support is listed as available; CORS is listed as Yes. This makes INFURA Ethereum a useful integration candidate when a project needs interaction with the Ethereum mainnet and several testnets through a programmatic interface. Because API capabilities, quotas, authentication rules, endpoints, and availability can change over time, the provider documentation should be treated as the current technical reference.
Kraken
Cryptocurrency
Kraken is an API listed in the Cryptocurrency category that provides access to cryptocurrencies Exchange. It is intended for developers who want to integrate this type of cryptocurrency data or functionality into websites, mobile applications, dashboards, automation workflows, research projects, prototypes, or backend services without building the underlying data source or service from scratch. From the supplied API metadata, the supplied listing identifies apiKey as the authentication method; HTTPS support is listed as available. This makes Kraken a useful integration candidate when a project needs cryptocurrencies Exchange through a programmatic interface. Because API capabilities, quotas, authentication rules, endpoints, and availability can change over time, the provider documentation should be treated as the current technical reference.
KuCoin
Cryptocurrency
KuCoin is an API listed in the Cryptocurrency category that provides access to cryptocurrency Trading Platform. It is intended for developers who want to integrate this type of cryptocurrency data or functionality into websites, mobile applications, dashboards, automation workflows, research projects, prototypes, or backend services without building the underlying data source or service from scratch. From the supplied API metadata, the supplied listing identifies apiKey as the authentication method; HTTPS support is listed as available. This makes KuCoin a useful integration candidate when a project needs cryptocurrency Trading Platform through a programmatic interface. Because API capabilities, quotas, authentication rules, endpoints, and availability can change over time, the provider documentation should be treated as the current technical reference.
Localbitcoins
Cryptocurrency
Localbitcoins is an API listed in the Cryptocurrency category that provides access to p2P platform to buy and sell Bitcoins. It is intended for developers who want to integrate this type of cryptocurrency data or functionality into websites, mobile applications, dashboards, automation workflows, research projects, prototypes, or backend services without building the underlying data source or service from scratch. From the supplied API metadata, the supplied listing indicates that authentication is not required; HTTPS support is listed as available. This makes Localbitcoins a useful integration candidate when a project needs p2P platform to buy and sell Bitcoins through a programmatic interface. Because API capabilities, quotas, authentication rules, endpoints, and availability can change over time, the provider documentation should be treated as the current technical reference.
Mempool
Cryptocurrency
Mempool is an API listed in the Cryptocurrency category that provides access to bitcoin API Service focusing on the transaction fee. It is intended for developers who want to integrate this type of cryptocurrency data or functionality into websites, mobile applications, dashboards, automation workflows, research projects, prototypes, or backend services without building the underlying data source or service from scratch. From the supplied API metadata, the supplied listing indicates that authentication is not required; HTTPS support is listed as available; CORS is listed as No. This makes Mempool a useful integration candidate when a project needs bitcoin API Service focusing on the transaction fee through a programmatic interface. Because API capabilities, quotas, authentication rules, endpoints, and availability can change over time, the provider documentation should be treated as the current technical reference.
MercadoBitcoin
Cryptocurrency
MercadoBitcoin is an API listed in the Cryptocurrency category that provides access to brazilian Cryptocurrency Information. It is intended for developers who want to integrate this type of cryptocurrency data or functionality into websites, mobile applications, dashboards, automation workflows, research projects, prototypes, or backend services without building the underlying data source or service from scratch. From the supplied API metadata, the supplied listing indicates that authentication is not required; HTTPS support is listed as available. This makes MercadoBitcoin a useful integration candidate when a project needs brazilian Cryptocurrency Information through a programmatic interface. Because API capabilities, quotas, authentication rules, endpoints, and availability can change over time, the provider documentation should be treated as the current technical reference.
Frequently Asked Questions About Free APIs
What are the best free APIs for developers?
The best free APIs include OpenAI API (free tier), GitHub REST API, OpenWeather API, and Alpha Vantage for finance data. Our directory lists hundreds of free APIs across AI, weather, finance, and developer categories.
Do these APIs require a credit card?
Most APIs in our directory offer free tiers that don't require a credit card. Some may require registration for an API key, but you won't be charged for basic usage within their free limits.
How do I integrate these APIs into my project?
Each API listing includes the endpoint URL with a copy button. Click to copy the endpoint, then use it in your HTTP requests. Visit the API's documentation (linked on each page) for authentication details and usage examples.
What's the difference between free and paid API tiers?
Free API tiers typically have rate limits (requests per minute/day) and may offer fewer features. They're perfect for development, testing, and small projects. Paid tiers offer higher limits, more features, and SLAs for production use.
Can I use these APIs for commercial projects?
Most APIs allow commercial use on their free tiers, but check each API's terms of service. Some may require attribution or have specific usage restrictions for commercial applications.