Intraday Data

In additional to daily end-of-day stock prices, the Marketstack API also supports intraday data with data intervals as short as one minute. Intraday prices are available for all US stock tickers included in the IEX (Investors Exchange) stock exchange.

To access intraday market data, use the API’s Intraday Endpoint and specify your desired stock ticker symbols.

Notes:

• A daily updated list of all tickers accessible via Marketstack is available for download:Download Ticker List

• You can also request intraday data for individual ticker symbols using the Tickers Endpoint.

• Ticker Symbol Formatting: When querying ticker symbols that include a period (.), replace the period with a hyphen (-) when using the Intraday Endpoint. Example: BRK.B → BRK-B

IMPORTANT NOTE: In the case of Intraday, Marketstack provides derived data that calculates a real-time reference price for each asset. While this is not a substitute for the TOPS Feed, we believe it will fulfill the needs of 95% of our customer base.

We’re doing so because as of February 1st, 2025, the IEX Exchange has changed its market data policies. To receive the FULL TOPS Feed, you must now have a market data agreement signed with the IEX Exchange. This means that the parameters bidPrice, bidSize, askPrice, askSize, lastPrice, lastSize, mid, and last will all return NULL in the API response for intraday since IEX entitlement is required for them. If you still need to have access to TOPS Feed, please contact our customer support team before signing any contract with them.

For using our derived data, there is no need to have a market data agreement signed with the IEX exchange, and there is no additional cost to the IEX Exchange.`