Marketstack
Access real-time, intraday, and historical market data via API key.
Read docs Updated 2026-06-18
What is Marketstack?
Marketstack is an API service that supplies real-time, intraday, and historical market data.
It supports integration for applications requiring finance-related market information.
What you can build with Marketstack
Build a live stock ticker widget
Embed real-time equity prices and intraday updates into dashboards or websites by polling the API endpoints for selected tickers.
Backtest trading strategies
Retrieve historical end-of-day and intraday OHLCV data to run simulations and validate algorithmic trading rules over multiple years.
Power portfolio monitoring apps
Fetch current quotes and performance metrics for user watchlists, then calculate daily returns and alerts inside mobile or web applications.
Get started with Marketstack
- 1Sign up at marketstack.com and copy your free API key
- 2Read the endpoint reference in the documentation
- 3Append your access_key parameter to any HTTPS request
- 4Test a basic quote call such as /v1/eod or /v1/intraday
- 5Parse the JSON response and handle rate-limit headers
Marketstack: pros & cons
Pros
- +Real-time, intraday and historical coverage in one API
- +Simple API-key authentication over HTTPS
- +Consistent JSON responses across endpoints
- +Global exchange support including major US and European markets
Cons
- –Free plan limited to 100 requests per month
- –No WebSocket streaming; polling required for live data
- –Some smaller exchanges have delayed or missing symbols
Did you find this helpful?
Frequently asked questions
A REST API that delivers real-time, intraday and historical stock market data for equities and indices.
User reviews
Verified reviews from the community shape this listing's rating.
Loading reviews…
Similar APIs
Other finance & crypto options worth comparing.