announcement - Polygon.io

Upcoming Changes to Bid and Ask Sizes in Stocks Quotes

Effective Nov 3, 2025, bid_size/ask_size will be reported in shares (not round lots) across Stocks Quotes REST API, WebSocket, and Flat Files, per SEC MDI rules. The rule is forward-looking and we’ll also backfill history for consistency. Most users need no changes.

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Announcing Polygon.io Financials: Balance Sheets, Cash Flow, Income Statements — and Ratios

There are four new fundamentals endpoints, one daily-refreshed ratios feed, and a developer experience designed for screens, research, and automated reporting.

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Benzinga Data Now Available on Polygon.io

Polygon.io is excited to announce a new partnership with Benzinga, significantly enhancing our financial data offerings. Benzinga’s detailed analyst ratings, corporate guidance, earnings reports, and structured financial news are now available through Polygon’s REST APIs.

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Sentiment Analysis with Ticker News API Insights

Explore how Polygon.io's enhanced Ticker News API leverages advanced sentiment analysis for strategic market insights, featuring practical applications with real-world data.

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Finding Connections with the Related Companies API

In this tutorial, we'll explore the capabilities of Polygon.io’s Related Companies API, where we learn how to identify and visualize intricate corporate relationships using Python and vis.js.

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Build and Test Your APIs with Polygon.io Postman Collection

We just released the official Polygon.io collection on the Postman Public API network.

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Integration: QuantConnect

We are excited to announce our integration with QuantConnect! This offering empowers users with state-of-the-art research, backtesting, parameter optimization, and live trading capabilities, all fueled by the robust market data APIs and WebSocket Streams of Polygon.io.

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Integration: everviz

We are thrilled to announce our latest partnership with everviz, bringing embeddable visualizations of Polygon.io data to any platform.

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Historical File Downloads Included In All Plans – No Really

Polygon now includes daily historical Flat Files in all paid plans at no extra charge, featuring a new web-based File Browser and S3 access for simplified data exploration and integration.

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Release Notes - September 2023

We've introduced historical second aggregates based on user feedback, and enhanced our system monitoring to ensure you're always updated in real time.

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Release Notes - July 2023

We've been hard at work introducing new features such as our Universal Snapshot API, a Polygon plugin for ChatGPT, and Indices data. We've also made a number of improvements to our services and have some exciting case studies and tutorials to share with you.

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Track Movements Across Markets with our New Universal Snapshot API

Discover the newly launched Universal Snapshots API, a powerful tool providing streamlined and consistent market data across Stocks, Options, Indices, Forex, and Crypto assets, all in one API call - enhancing your market analysis and decision-making process.

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Announcing the Polygon ChatGPT Plugin

Introducing the Polygon plugin for ChatGPT, a powerful tool that simplifies financial research by providing easy access to real-time and historical market data for Stocks, Options, Indices, Forex, and Crypto.

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Indices Data Has Arrived

We are excited to announce the launch of the Indices API [https://polygon.io/docs/indices/getting-started] endpoints, offering real-time and historical market data for over 11,400+ Indices, including the S&

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Simplifying Data Access with CSV Support

We are excited to announce the launch of CSV support for our REST APIs. You can now choose between JSON and CSV formats when making requests to our platform for Stocks, Options, Forex,

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Release Notes - March 2023

What's new at Polygon? Indices data, CSV support and improved company financials are just a few of the things we've added to the platform over the last few weeks. Read more about our recent feature launches and improvements.

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Introducing Options Chain Snapshot API

Level up your trading game by getting the most up-to-date price data for an asset's entire options chain in a single API call. Sort and filter by every aspect of an

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OTC Stocks Have Arrived

We've just rolled out OTC data to every stocks plan on the Polygon platform. No additional subscription is needed, just query any OTC ticker from our REST or WebSocket APIs and get data for all US OTC venues.

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Polygon Integrates Nasdaq Basic

Today, we’re proud to announce a new initiative with Nasdaq to integrate Nasdaq Basic data into the Polygon market data platform as an add-on to our Stocks Business offering. Stocks Business with

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Introducing Stock Options APIs

We’ve just launched a new set of Stock Options APIs that change the game for options trading. We’re making available real-time trade and quote data from the full OPRA feed, as

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Polygon.io partners with Cboe to deliver market data APIs for apps, websites, and displays.

Unlimited APIs, running on world class infrastructure directly inside the exchange data centers, licensed for distribution to an unlimited number of end users.

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New Stock Financials API

We’ve just dropped our new Financials API featuring company financials sourced directly from SEC filings. We’ve standardized annual and quarterly company filings into fundamental accounting concepts that are easy to use and compare across companies and industries.

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New and Improved Financial News API

Our recently released News API v2 delivers up-to-date content from multiple major financial news outlets, better searching capabilities, and conformity with our standard response structure and pagination patterns.

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Point-in-time Ticker Details, Directly From the Source

Our new experimental Ticker Details API provides company info sourced directly from SEC filings. We've also included point-in-time searching so that you can get detailed data on a company exactly as it was on a given date.

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New Point-in-Time Tickers API

Our new point-in-time tickers API is available on an experimental basis. We've added nightly data syncs, pagination, and the ability to query by date. With the added date dimension, you can query the historical info of a single ticker or get an overview of all tickers actively traded on that date.