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

Quality

npm i plaid

PaidBanking Connectivity

Yodlee API

Financial data aggregation for bank accounts and transactions.

CLI

Quality

PaidBanking Connectivity

MX API

Financial data connectivity and money management tools.

CLI

Quality

Blockchain Infrastructure(2)

FreemiumBlockchain Infrastructure

85k/wk

Alchemy API

Web3 development platform for Ethereum and other chains.

CLI

Quality

npm i alchemy-sdk

FreemiumBlockchain Infrastructure

28k/wk

Moralis API

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

CLI

Quality

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

Quality

npm i @polygon.io/client-js

FreemiumMarket Data

1.8k/wk

Alpha Vantage API

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

CLI

Quality

npm i alphavantage

Crypto & Blockchain(5)

FreemiumCrypto & Blockchain

11k/wk

CoinGecko API

Crypto prices, market data, and exchange information.

CLI

Quality

npm i coingecko-api

FreeCrypto & Blockchain

7.1k/wk

Binance API

Crypto exchange trading, market data, and account management.

CLI

Quality

npm i binance

FreemiumCrypto & Blockchain

2.5k/wk

Coinbase API

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

CLI

Quality

npm i coinbase

FreemiumCrypto & Blockchain

CoinMarketCap API

Cryptocurrency market cap rankings, prices, and charts.

CLI

Quality

FreemiumCrypto & Blockchain

Etherscan API

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

CLI

Quality

Stock Trading(1)

FreeStock Trading

9.7k/wk

Alpaca API

Commission-free stock and crypto trading API.

CLI

Quality

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

Quality

npm i open-exchange-rates

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