Polygon.io – Real-time Stock APIs, Forex and Crypto
Stock API with real-time and historical tick data, unlimited usage via REST or WebSockets, standardized JSON and CSV formats. Instant access free tier.
Polygon.io – Real-time Stock APIs, Forex and Crypto launched on April 30, 2020 with 12 votes, #1,208 of 5,003 launches that month and more than 75% of that year's launches. The site was still online in September 2026, 6 years on.
In plain words
Polygon.io provides real-time APIs for accessing stock market, forex, and cryptocurrency data. Built for developers and financial applications that need live market information, the platform offers programmatic access to pricing and trading data across multiple asset classes. It launched in April 2020 and serves as a data infrastructure tool for building finance-related software and services.
written from the facts on this page · September 2026
From the sources
At Massive, we're on a mission to modernize the financial industry. We believe that the industry runs on old technology, and we're here to change that. Our S3 interface lets you access our flat files easily and seamlessly. With just a few clicks, you'll have the data you need to power your applications. Our Restful and WebSocket APIs provide flexible and powerful options for accessing our data. Whether you need real-time or historical data, we've got you covered. Our SQL Query option lets you harness the power of SQL to access our data. With this flexible and intuitive option, you can easily customize queries to fit your needs. We're committed to providing fair access to the financial…from polygon.io
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