12 Best Stock Market APIs to Build Financial Products

The inventory market {industry} has witnessed large technological adoption lately.

This transformation within the face of the inventory market {industry} is rising so swiftly that it has created a paradigm shift, influencing trendy monetary establishments. Revolutionary applied sciences like cloud-based software programming interface (API) are inflowing the panorama for all good causes.

However why is everybody speaking instantly about Inventory APIs?

Effectively, to grasp this, let’s zoom out on the relevance of inventory APIs for monetary market information shoppers.

Understanding Inventory market APIs

Inventory market APIs are a boon to merchants, buyers, and software program builders. It’s as a result of inventory APIs can join these information shoppers effortlessly with correct and related information sources. On prime of that, acquiring inventory market information by APIs is straightforward, coherent, and predictable in a correctly structured format.

Inventory APIs intention at facilitating information sharing, entry, and cost transactions. You’ll be able to retrieve monetary information while you want, share information between APIs for shoppers, enterprise companions, firm staff, and third-party distributors. Apart from, you’ll be able to simply sync information utilizing these APIs throughout totally different purposes.

So, what occurs with out a inventory API?

On this case, inventory market information shoppers must write difficult codes to be able to parse uncooked information straight from inventory exchanges. And this can be a robust course of as a result of availability of inventory exchanges in abundance, every with totally different information transmission processes.

leverage inventory market information to construct monetary merchandise?

Inventory market APIs come in useful for that matter, making all the things clean like cheese by parsing uncooked market information and presenting it in an accessible and clear format.

In case you are constructing your monetary merchandise like a buying and selling prediction software, a inventory API can show to be of nice assist. You’ll be able to leverage these APIs to know the most recent market worth and comply with historic developments to maintain up with devices like equities, currencies, fixed-income merchandise, and extra.

It’s extremely important to know the most recent worth and developments in real-time so you’ll be able to leverage them to the utmost potential and calculate the dangers concerned.

Market information that you simply want for a particular instrument embrace the most recent bid, trade code, buying and selling venue, and instrument identifier. It might additionally add different information akin to supply sizes, traded quantity, and so forth.

Inventory APIs aid you acquire these time-sensitive information so you’ll be able to take actionable insights into constructing your monetary merchandise.

Nonetheless, there are some pitfalls related to APIs, as all of them should not created equal. So, regardless of their magic to parse uncooked inventory market information, listed below are a couple of elements you must think about.

Accessible API sorts 🔑

APIs will be of various sorts – Relaxation API, FTP, TCP, and many others. Selecting the one in line with your information necessities and pace can be sensible.

Whereas a typical Relaxation API helps you acquire information in real-time and is comparatively quick, in case you don’t wish to accept customary pace and as an alternative need a quicker different, TCP will be your possibility. With TCP, there’s no have to request for fetching the information, opposite to Relaxation API.

Nonetheless, if you’re okay with customary information pace, you’ll be able to go for FTP that gives information on the finish of a day. This fashion, it can save you a couple of dollars as effectively.

API calls 🗓️

Many information distributors restrict the API name frequency {that a} purchaser could make in a minute to be able to get the information. They achieve this to keep up their aggressive edge.

Therefore, you might want to take into consideration what frequency you need and quote accordingly. For instance, in case you request for one name/minute, they’ll replace information solely after each minute.

Latency 🚄

Some latency may comply with in-between information updates. The delay can vary from some milliseconds to seconds.

Therefore, before you purchase an API, be sure to clear this side; in any other case, they’ll sneak some information, and you’ll by no means know.

Now, it’s time to search out among the inventory market APIs within the subsequent part!

Alpha Vantage

Alpha Vantage is a number one supplier of inventory information APIs in addition to elementary information, monetary information & sentiments, overseas trade charges (foreign exchange), commodities, financial indicators, and technical indicators. It’s backed by Y Combinator, a pioneering Silicon Valley primarily based enterprise capital agency. It additionally has a big open-source ecosystem, with over 700 GitHub libraries constructed on prime of its APIs. 


Alpha Vantage ensures clean API integration with out friction. It helps Python, PHP, Java, Javascript, and extra. You additionally get official add-ons you should utilize for Google Sheets and Excel in case you like to entry information by spreadsheets.

You even have the choice to get information in JSON codecs. Get began and begin constructing your monetary merchandise utilizing the high-quality information Alpha Vantage gives you. You’ll be able to browse the API documentation to grasp their API library and preserve exploring.


Whether or not you need historic market information, intraday, or real-time information, Marketstack is there for you!

Get an easy-to-use REST API interface to acquire inventory market information. To facilitate simplicity, it lets you request information by HTTP GET and get response information in JSON format. Right here, you’ve got the flexibleness to make use of a free or paid model in line with your necessity.

With Marketstack, you will get 30+ years of exact historic information to drive significant insights. Combine this API simply and make the most of over 125,000 inventory tickers throughout the globe from 72 inventory exchanges, together with NYSE, Nasdaq, ENX, TYO, ASX, and extra.

The REST API of Marketstack is straightforward but scalable and sturdy, able to delivering as much as 100% uptime. Simply get began inside 5 minutes and proceed exploring new horizons. If you wish to use its free plan, you don’t want a bank card, cost, or contract. You may get on the spot entry to the API and luxuriate in as much as 1000 requests per 30 days with end-of-day inventory information, even within the free plan.

Marketstack leverages state-of-the-art applied sciences with nice scalability of cloud infrastructure to construct the inventory API. Because of this, it may possibly effortlessly deal with request volumes of various kinds – from lots of to thousands and thousands on a single day.

With regards to safety, Marketstack gives bank-level safety by encrypting every byte with industry-level 256-bit HTTPS encryption. With in depth documentation like code examples and demo requests accessible on API, you can begin utilizing it with none trouble.


Construct your merchandise with deeper insights into the inventory market utilizing the Barchart OnDemand. It gives you with versatile and cloud-based APIs to strengthen your workflows, merchandise, and purposes.

With Barchart, you will get energy charts representing historic and real-time market information. Integrating information into a web site is straightforward, and you should utilize the information to form your current enterprise technique. As well as, you’ll be able to create dynamic instruments and purposes with out trouble.

With build-in scalability with the cloud, you’ll be able to speed up your workflows. Barchart makes use of Amazon Internet Companies (AWS) to keep up information facilities in the US and ensures most information redundancy and reliability.

Along with cloud, Barchart maintains bodily information facilities as effectively to fulfill particular shopper necessities. These are Equinox-based facilities with low latency and bodily backups. Thus, you’ve got the liberty to decide on any of the information heart fashions you need.

Using built-in safety methods and server virtualization, Barchart helps scale up its companies very quickly. It helps each POST, GET, and SOAP requests and may ship information in a number of codecs, together with CSV, JSON, XML, and helps WebSockets as effectively.

Barchart OnDemand is suitable with a number of working methods akin to Linux, Home windows, Android, and iOS. It additionally works on totally different programming languages like Java, Python, PHP, ASP.NET, and R.

With regards to pricing, Barchart costs primarily based in your information utilization. It gives versatile plans that you could select primarily based on the dimensions of your corporation and pay for less than what you utilize.

Monetary Modeling Prep

Improve your purposes with Monetary Modeling Prep’s (FMP) information that goes again to 30 years of historical past. It might offer you right information, akin to monetary statements, earnings calendars, a number of exchanges, and much more. Its API helps greater than 15,000 shares throughout a number of exchanges like XETRA, TSX, SEHK, SEDAR, EURONEXT, the Complete U.S. market, and extra.

You will see each endpoint in JSON format in addition to CSV format. Until now, it has 50 endpoints, and it provides new ones each week. Apart from, you’re going to get a customized endpoint. All the information comes from SEC filings after FMP units the sequence and FMP has a real-time inventory worth.

FMP covers all the elemental information by offering steadiness sheet statements, cashflow statements yearly or quarterly, and revenue statements. It has 1 minute, quarter-hour, half-hour, 1 hour, and every day information of historic inventory costs.

Use FMP totally free and get 250 requests/day. It’s excellent for testing your concepts. Select a paid plan which is finest for researchers at simply $14/month and get 100% market protection, 300 API calls/minute, and extra.


Make the most of the highly effective inventory market API of Finnhub Inventory API to acquire information for constructing your monetary merchandise. It provides you real-time WebSocket and RESTful APIs for inventory information, cryptocurrencies, and fiat currencies.

Finnhub gives monetary statements intimately for firms throughout the globe from the previous 30+ years. You may get the entire checklist of all of the shareholders which are categorized primarily based on establishments and people.

Additionally they provide you with incomes notifications in real-time, upgrades or downgrades, worth targets, and historic surprises that you should utilize to additional form your monetary merchandise. Apart from, you additionally get dividends information of 30 years.

Get historic information of 25 years for the US inventory market in real-time, join with greater than 10 Foreign exchange brokers, and entry over 15 crypto brokers. It additionally provides an entire pre-computed technical evaluation, sample recognition, help or resistance ranges, and combination indications. You’ll be able to entry to name transcripts of over 20 years of earnings and obtain audio.

Do you wish to know the historical past of acquisitions and mergers?

The API makes it doable!

It gives present inventory market information to grasp all of the happenings at current. Research the COVID-19 disruptions in the marketplace by the real-time statistics of the pandemic. Moreover, Finnhub guarantees 99.99% uptime, together with an SLA and computerized scalability.

EOD Historic Information

Receive inventory market information by using the inexpensive and versatile companies of EOD Historic Information. It gives historic and delayed information, end-of-day, technical, elementary, dividends, and splits.

It helps 60+ inventory exchanges worldwide in the mean time. For elementary information, it helps main inventory exchanges, each US-based and non-US, and brings information from 20+ years. Additionally they have ten years or final 20 quarters of information belonging to some minor exchanges.

With a wealthy 30+ years of EOD Historical past protecting indices, 45k+ mutual funds, US shares, and ETFs, you’ll be able to execute higher information evaluation. It gives correct and dependable information from 15+ sources, protecting a lot of inventory exchanges.

To check the integrity of information, additionally they use a number of sources to check the information and ship solely the perfect to you. Get super-fast help anytime through chat and e mail in case something goes unsuitable. They often resolve 99.99% of points in 24 hours or much less.

EOD Historic Information facilitates versatile costs the place it’s important to pay for the companies you utilize. Its pricing begins from $19.99/month for 100,000 API requests/day, 1000+ Foreign exchange pairs, 100+ indexes, and extra.


Constructing monetary merchandise and scaling them is straightforward with IEX Cloud API because it gives simple methods to acquire and use correct market information. Empower your builders with curated institutional-level information, together with real-time, fundamentals, worldwide equities, possession, mutual funds, and different information.

You get the entire protection to the US market with 95k+ securities, 100+ currencies, and from 20+ exchanges. It lets you entry information very quickly, so your complete focus will be on constructing the API with impeccable options helpful in your customers.

Pay for precisely what you utilize with the versatile and scalable pricing mannequin of IEX Cloud with out requiring any long-term contract or large upfront funds. Combine the instruments you already use with the API, so that you don’t have to begin over with a special technique.

With IEX Cloud API, you recover from 2 billion messages per day with 28ms latency on common. All of your information is tightly secured with PCI and DSS compliance. Its platform is dependable, with 99.95% SLA, permitting you to construct merchandise with out worries.

Premium companions of IEX Cloud continually provide highly effective enterprise-level information. You can too search premium help by upgrading your plan.


Whether or not you might be a person developer, a expertise agency, or have hedge funds, Tiingo can energy your monetary merchandise.

To ship exact end-of-day costs, it makes use of a proprietary framework for error-checking to gather clear information. This framework additionally helps them with lacking occasions and for creating redundant feeds. Tiingo Information feeds comprise 16 million helpful articles curated primarily based on years of analysis.

These articles are a treasure with historic market information from 20+ years. The information feed is a supply of tagged content material containing monetary and non-traditional information. Tiingo’s Crypto API consists of a number of exchanges with a stream of helpful information, each historic and intraday information.

You’ll be able to phase exchanges and currencies to make use of information the higher method. With Foreign exchange and FX feed, you’ll be able to entry tier-1 banks together with institutional-level liquidity. Entry their cross-connect to get IEX inventory API in real-time, exhibiting excessive efficiency and minimal latency.

Tiingo deploys quick servers and constant uptime with optimized reminiscence caching. It additionally constantly performs information audits to offer uninterrupted information supply.

Entry historic and intraday information with top-of-book updates by REST APIs, whereas for real-time information with top-of-book updates, use WebSockets.


Intrinio gives end-of-day, historic, intraday, and real-time information you’ll be able to make the most of in your monetary product constructing. It lets you obtain exact historic market information from the previous 5-50 years.

In case you are on the lookout for market information on a subscription foundation for shaping your funding methods and constructing purposes, Intrinio’s choices are diversified. You may get pricing information related to totally different asset lessons, monetary assertion info and evaluation, estimates, projections, and scores.

As well as, you get aggregated, industrial, and financial information. Get information for holdings, metadata, and analytics for ETFs.

However in case you simply have to obtain historic market information for one time solely to energy your backtesting theories or machine studying algorithms, Intrinio has options for you too.

Apart from, you get the monetary information of the US Municipality for 2017 that features entity ID, names, objects, and so forth. It additionally gives 18+ years of Foreign exchange information, together with all of the market actions and costs.


Nasdaq is the American Inventory Trade, ranked second highest by market capitalization of shares traded after the New York Inventory Trade.


Nasdaq API is straightforward but highly effective and gives entry to thousands and thousands of economic and financial info from over 250 sources onto a easy interface and eliminates the necessity to handle varied sources and continually altering publication codecs.

It gives easy calls to retrieve historic inventory costs in CSV, JSON, or XML format. The API can deal with complicated datasets, akin to quarterly proportion modifications in inventory costs.

On the portal, customers can entry lots of of free datasets from varied sources. Customers can request extra datasets, and new information is uploaded on a weekly foundation.

Codecs, date ranges, row and column restrictions, sorting, and computations are all supported through the API.


Give extra energy to your builders by Polygon API to assist them with uncooked and correct monetary information, together with cryptocurrencies, Foreign exchange, and inventory information.

Whether or not you need historic or real-time information, you will get limitless entry to them. Polygon gives 24k+ symbols and full market protection, real-time WebSockets together with aggregates, trades, quotes, buying and selling halts, and restrict up/down.

Get reference information RESTful APIs for markets, locales, market standing and holidays, inventory splits, dividends, and financials; tickers with its sorts, information, and particulars.

Polygon additionally gives forex APIs that embrace information from 1000+ Foreign exchange pairs and ten banking organizations.

You’ll be able to construct purposes in a number of languages like Java, C, C++, Javascript, Python, and many others. It saves your developmental time that you could spend money on integration. To simplify issues, Polygon gives pattern codes in numerous languages.

Polygon provides you dependable and quick information with ultra-low latency of lower than one millisecond. It gives quick Equinix NY information facilities with a number of redundancies and the potential of sending 1+ million messages in a second.

For 100% inventory market protection, together with 16 US-based inventory exchanges and darkish swimming pools, it prices $199/month for private use. Equally, it prices $49/month for 1000+ Foreign exchange pairs plus tick-by-tick updates and $49/month for Stage 1& two crypto information entry from large banking establishments and exchanges.


Leverage the commission-free API of Alpaca to construct your monetary merchandise. Your builders can simply handle shares, algorithms, and capital utilizing the one built-in system. Its commerce API is a REST interface connecting purposes with brokerage service in real-time.

Entry account information, orders, property, positions, and lots of extra. It’s paper buying and selling API additionally lets you check your codes, algorithm resets, and many others. and gives a Streaming API that makes use of WebSockets to ship real-time updates concerning trades.

It gives 2-factor authentication to safe all of your API. You can too profit from brief promoting and margins with superior investing choices, and it additionally helps buying and selling methods. Utilizing a testing atmosphere, you’ll be able to test your codes and work earlier than product deployment or making the modifications reside.

Alpaca facilitates environment friendly buying and selling by permitting you to commerce straight from the TradingView chart, which requires no tab switching or additional clicks. It gives highly effective instruments to spice up your manufacturing like superior order sorts like OCO, MOO, IOC, and MOC.


Acquiring market information by inventory APIs is straightforward, easy, and predictable. However you additionally want to make sure you get up to date and correct information on the proper time. The APIs talked about above come in useful to fulfill this requirement and form your monetary merchandise the best way you’ve got desired.

In case you are constructing monetary merchandise, you also needs to think about integrating information with the assistance of those International Information APIs.
Listed below are some nice apps to spend money on shares and ETFs.

Rate this post
Leave a Comment