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Best Fintech & Banking APIs in 2026

Banking connectivity, stock trading, crypto exchange, and market data APIs. Connect your app to the financial system.

14 APIs across 6 subcategories

Banking Connectivity(3)

Pay-per-useBanking Connectivity
547k/wk

Plaid API

Connect apps to bank accounts for transactions, balances, and identity.

CLI
9
Quality
8
npm i plaid
PaidBanking Connectivity

Yodlee API

Financial data aggregation for bank accounts and transactions.

CLI
5
Quality
4
PaidBanking Connectivity

MX API

Financial data connectivity and money management tools.

CLI
5
Quality
4

Blockchain Infrastructure(2)

FreemiumBlockchain Infrastructure
85k/wk

Alchemy API

Web3 development platform for Ethereum and other chains.

CLI
8
Quality
5
npm i alchemy-sdk
FreemiumBlockchain Infrastructure
28k/wk

Moralis API

Web3 data APIs for NFTs, tokens, wallets, and DeFi.

CLI
8
Quality
4
npm i moralis

Market Data(2)

FreemiumMarket Data
14k/wk

Polygon.io API

Real-time and historical market data for stocks, options, crypto, and forex.

CLI
8
Quality
4
npm i @polygon.io/client-js
FreemiumMarket Data
1.8k/wk

Alpha Vantage API

Free stock, forex, and crypto market data and indicators.

CLI
7
Quality
3
npm i alphavantage

Crypto & Blockchain(5)

FreemiumCrypto & Blockchain
11k/wk

CoinGecko API

Crypto prices, market data, and exchange information.

CLI
5
Quality
4
npm i coingecko-api
FreeCrypto & Blockchain
7.1k/wk

Binance API

Crypto exchange trading, market data, and account management.

CLI
8
Quality
3
npm i binance
FreemiumCrypto & Blockchain
2.5k/wk

Coinbase API

Crypto trading, wallets, payments, and real-time market data.

CLI
9
Quality
4
npm i coinbase
FreemiumCrypto & Blockchain

CoinMarketCap API

Cryptocurrency market cap rankings, prices, and charts.

CLI
5
Quality
3
FreemiumCrypto & Blockchain

Etherscan API

Ethereum blockchain explorer data: transactions, balances, and tokens.

CLI
5
Quality
4

Stock Trading(1)

FreeStock Trading
9.7k/wk

Alpaca API

Commission-free stock and crypto trading API.

CLI
8
Quality
4
npm i @alpacahq/alpaca-trade-api

Currency & FX(1)

FreemiumCurrency & FX
2.6k/wk

Open Exchange Rates

Real-time and historical exchange rates for 170+ currencies.

CLI
8
Quality
4
npm i open-exchange-rates

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