

marketstack is a popular, easy-to-use REST API interface that delivers real-time, intraday, and historical stock market data. The API is powered by cutting-edge technology and a scalable cloud infrastructure capable of handling several million API requests per hour with ease. You can search from 125,000+ worldwide stock tickers, collected from 72 global exchanges, including Nasdaq and the NYSE. Using the marketstack REST API, you will be able to obtain end-of-day and intraday data, as well as historical market data for the last 30 years. With the marketstack API, you can: query for real-time, intraday, and historical stock market data define multiple stock symbols retrieve extensive data from about 72+ stock exchanges access 125,000+ stock tickers from more than 50 countries retrieve information on time zones, currencies, and more

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Zipcodebase.com is the perfect tool to perform postal code validation, lookups and other calculative tasks, such as postal code distance calculations.

Userstack is a user-agent API lookup service that allows users to detect browsers and devices in real-time.
Apilayer is a service provider of cloud-based software development kits and APIs, offering robust solutions for various business needs. Notable among their offerings is Fixer.io, accessible via https://fixer.io/. Fixer.io provides a powerful API for real-time and historical foreign exchange rates and currency conversion. It is designed to serve developers, businesses, and anyone needing reliable and accurate exchange rate data for easy integration into their financial, ERP, or analytics software systems. The platform supports JSON API for real-time data access, ensuring broad compatibility and ease of implementation. Fixer.io is prized for its simplicity, efficiency, and comprehensive currency data coverage.