What's newPolygon is now Massive

Modernizing Wall St. one market at a time.

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.

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By developers for developers

Made for builders, founders, scholars, dabblers, and dreamers

Standardized JSON / CSV.
Our data is available in both JSON and CSV formats, making it easy for you to integrate it into your application.
Client Libraries.
Our client libraries make it simple to access and use our data, so you can spend less time worrying about the technical details and more time building your application.
Tutorials & Examples.
We know that getting started with a new API can be hard, which is why we provide tutorials and examples to help you get up and running in no time.
from massive import RESTClient

client = RESTClient("API_KEY")

aggs = []
for a in client.list_aggs(
    "AAPL",
    1,
    "minute",
    "2022-01-01",
    "2023-02-03",
    limit=50000,
):
    aggs.append(a)

print(aggs)
Rows of Data
0 Trillion+
Raw Data
0 Petabytes
Uptime
0%
Messages/sec
0 Million

Intuitive and easy-to-use

Powerful data, simple access

Choose the data access method that suits your needs and get started today.

Flat Files

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.

Explore datasets

API

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.

View docs

SQL

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.

Request access

Direct from the source

No middlemen, just us

We're located in the datacenter with direct fiber cross-connects to the exchanges. We own the entire infrastructure so we can ensure quality at each step in the pipeline.

Direct connectivity means faster updates, fewer points of failure, and accurate market data you can depend on for your applications.

About Massive →

Major Exchanges

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Massive Infrastructure

Co-located in exchange datacenters

Direct fiber cross-connects
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Your Application

Real-time market data

Built with Massive

You're in good company

Whether you're building a trading app, a robo-advisor, or anything in between, our institutional-level data access can help you make better decisions and deliver better results.
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We had no idea the landscape around market data was so complex. Massive did the best job at simplifying the entire process.

Adam HanoCo-Founder
Yervand Khoranian profile photo
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Massive.com has been amazing to work with, and has allowed Fool.com to display US Equities data through their intuitive, easy to use APIs.

Yervand KhoranianInvestment Ops Specialist
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Massive.com APIs have set the standard for easy access to financial market data, and have proven to be extremely robust and reliable over the course of our partnership.

Fergus ColleranOps Manager, Wealth & Trading

Everything you need

Market data platform

Our API is easy to use, fast, and reliable, so you can spend less time worrying about data and more time building your app.

API first approach

Familiar RESTful APIs and WebSockets to consume data in a language agnostic way.

Accurate, fast, and reliable

Real-time data at <20ms latency. Complete redundancy, horizontal scalability, and built on proven technologies.

Extensive documentation

We're passionate about documentation and are always adding more tutorials, example projects, and explainers to support learners.

Financial data platform

Intuitive access to financial data in real-time and access to the world's financial history in an instant.

Institutional grade data

Directly from major exchanges. Clean, normalized data without survivorship bias.

Simple pricing

Unlimited access and simple, transparent monthly pricing across all available asset classes.

What will you build?

Discover the power of a market data platform that breaks down barriers and levels the playing field.

Get startedView our API docs →

From the blog

See what's happening at Massive
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announcement

Polygon.io is Now Massive

Polygon.io is now Massive.com. The rebrand reflects our focus on scale, reliability, and continued innovation. Your APIs, accounts, and integrations continue to work without interruption.

Justin

editor