Free-tier financial data

Currencyapi.com

Currencyapi.com provides a JSON REST API for current and historical foreign exchange rates. It exposes endpoints for latest rates, historical rates, and currency conversion data, with examples shown for cURL, PHP, Node.js, and Java.

Earnings Feed is a RESTful SEC data API that exposes filings, insider transactions, institutional holdings, and company profiles through JSON endpoints. The API includes endpoints for paginated filing...

CoinMarketCap API is a cryptocurrency and DEX market data API that exposes REST endpoints for listings, quotes, historical data, exchange data, global metrics, trending data, content data, and index v...

Market Data

Market Data provides a REST API and Google Sheets add-on for U.S. market data, including stocks, options, ETFs, and mutual funds. The service exposes real-time and delayed quotes, historical candlesti...

ExchangeRate-API

ExchangeRate-API is a currency conversion API that returns exchange rates for 165 currencies over HTTPS with JSON responses. The service supports simple GET requests and provides documentation for endpoint formats, supported currency codes, and historical exchange rate requests.

CurrencyBeacon is a REST API for live and historical currency exchange rates, currency conversion, and blockchain-related data. The service covers 170+ fiat currencies, over 200 world currencies, and 6,000 cryptocurrencies, with historical rates available back to 1995.

ProjectionLab

ProjectionLab is a modern financial planning and retirement simulation platform designed to help individuals model their long-term financial future with greater clarity and confidence. It provides a l...

Abstract Exchange Rate API

Abstract API's Exchange Rate and Currency Conversion API provides live and historical currency data through a modern REST API. It is designed for developers and businesses that need reliable exchange ...