Authorized NSE, BSE & MCX Stock Realtime API Provider

Traders have been using basic applications to get market data for many years. With the development of software platforms, traders gained access to real-time but delayed data. This caused challenges when traders needed to implement various strategies using live data. To address this issue, developers created APIs.

APIs (Application Programming Interfaces) have revolutionized our access to real-time and demand data. With the help of APIs, traders receive instant updates on real-time pricing data and other critical information on charts.

Many traders were searching for how to get API from NSE and other exchanges. So, for them, we have created APIs that work with almost every platform, whether web, desktop, or App. Our mission is to provide seamless delivery of real-time stock data through robust APIs, ensuring traders have access to accurate, instant market updates for intraday traders.

In this blog, we will focus on the evolution of APIs and their significance in trading. Let’s explore.

What is API? Why to use API in trading?

In simple terms, an API (Application Programming Interface) is a tool that allows different programs or devices to share information. Think of it like a bridge that helps one computer communicate to another.

The Importance of APIs in Stock Trading

For example, in trading or financial analysis, an API is used to send data (like stock prices) from a server (where the data is stored) to a client (like your computer, phone, or trading platform). The Stock Price API allows this exchange of data over the internet or other networks so that you can get the latest stock price and other essential financial information for trading or analysis purposes.

What are the Advantages of using API?

1) APIs can now be combined with the Broker’s platform.

For many years, some applications gave pricing data to traders, who had to place an order to buy or sell stocks, futures, options, and other financial instruments. With advanced charting platforms or trading applications, traders can quickly deploy specific APIs that can provide deep insights aligned with real-time data using the chart. APIs thus play an essential role in delivering realtime data for the charting platform.

2) APIs can be used with the Broker’s platform.

Every algo trader must test the automated strategies with the market data (real-time data, tick data, tick-by-tick data, historical data, etc.). So, to test the plan, an algo trader needs the market data from the exchange or broker. Some brokers may give you market data for free or a small monthly fee. You can use this data to test your trading strategies in the past, which is called backtesting. To access this data through their APIs, the broker gives you an API key and a secret key or tokens. These keys let you connect to the broker’s API and get realtime data.

3) Many APIs come with documentation for technical specifications.

Before using any API, you must read the API Documentation at once. The broker or API providers provide the API documentation. API documentation explains how to use and interact with an API. Documentation tells traders about how to send or get market data. It also contains error-handling procedures with custom methods, responses, and libraries.

4) APIs can also be used to access the market data with the Algo trading applications.

There are API providers who offer ready-made libraries with custom functions and tools. These can be easily used with the broker’s API or a custom API to get pricing data. Hence, You don’t have to write new code to access the APIs when you need financial data.

5) Fetching real-time data with APIs can be made faster using Cloud Computing.

As soon as the API generation connection request is made, the server should be capable of handling multiple client requests to send real-time data; for this, a fast-delivering server should be present. Because real-time data contains millions of small pieces of information such as ask price, ask size, bid price, bid size, implied volatility, volume, tick data, etc., a short delay can mislead the trader and cause potential financial loss.

Cloud computing provides the infrastructure to speed up fetching and delivering realtime data through APIs. Unlike traditional servers, which may struggle under heavy loads, cloud-based servers can automatically scale resources to meet demand, reducing latency and improving response times.

Furthermore, cloud providers offer various services and technologies, such as load balancing, caching, and distributed computing, that enhance API performance.

What are the 5 Important Characteristics of APIs?

 APIs are scalable, flexible, cacheable, stateless, and portable.

1) APIs are scalable. – An API can handle multiple types of requests and send various types of data, such as market data, as a response from the Server.

2) APIs are flexible or compatible in the context as

• Versioning – a trader can access the same API by migrating to the new version or staying with the same old API, which is called versioning.
• Backward Compatibility – Backward compatibility allows the latest or new version of API to communicate with the old versions.
• Forward Compatibility – Forward compatibility allows older versions of APIs to easily interact with the newer or updated versions without interrupting their functioning. 

3) APIs are cacheable, i.e., APIs can be stored in the server’s local cache, making them faster for execution. It means there is little to no delay when getting pricing data or other necessary information from the server.

4) APIs are stateless, i.e., they do not maintain the client state (session information) while processing the request.

5) APIs are portable, i.e., they can easily integrate with other APIs using API pathways without disrupting their functionality. This allows smooth operation across different application environments.

The above features of APIs help to build Share Market APIs or Indian Stock Market APIs.

Hence, an NSE, BSE and MCX Stock Realtime API Provider or Authorized Share Market Data Provider should provide a minimum of APIs that fulfill the above characteristics.

Let’s find out How APIs work.

Which APIs provide realtime data of NSE/BSE for stock prices?

Are you wondering whether an API exists for NSE (NSE Equity), BSE (BSE Equity), NFO (NSE Futures and Options), BFO (BSE Futures and Options), and other financial markets? The answer is yes! Four types of APIs provide real-time stock data or stock prices, which we have given below.

How many types of APIs are used for Market Analysis in India?

A trader can find the following types of API for accessing real-time market data. 

1) RESTful APIs

• REST API is also called Representational State Transfer API.
• REST API is the simplest way to establish communication between the client and Server, while RESTful API follows REST (Representational State Transfer) architecture or protocol. 
• REST architecture handles every content as a resource, and the client requests each resource using different web applications. The content can be pricing data, HTML pages, images, or any other significant form of resource.
• RESTful APIs, which are called “stateless APIs,” do not store any data, session, or status codes of the client requests; thus, they help reduce the extra load on the Server.
• The resource sent and received by the Server is in JSON (JavaScript Object Notation) or XML (Extensible Markup Language) format. 
• With the help of RESTful API, a trader can establish connections between different platforms or systems to work as a single system, a process called interoperability. This is used to access the available data or other vital information of a particular stock or futures and options segment.
• RESTful APIs can be used whenever a trader requests available data from the Server. Once the Server receives the request from the client, it immediately responds with the pricing data using HTTP methods and status codes as part of the HTTP API life cycle.

2) WebSockets API

• WebSockets API is a form of stateful API, i.e., the server always needs to maintain the state of the client requests, or in simple terms, any one of either client or server needs to close the connection upon closing the connection from one side, it gets automatically closed from another end.
• WebSockets APIs are designed for backward compatibility. Although they are part of the HTML5 specification, they still support older versions of HTML.
• WebSockets APIs also support forward compatibility, meaning they work with future versions of HTML while also using the current HTML5 standard.
• WebSockets APIs are more scalable. A single server can handle multiple WebSockets connections simultaneously, even if some of those connections are from the same client.
• A WebSockets handshake is the first step in establishing a WebSockets connection between a client and a server over various networks, such as local area networks (LANs), wide area networks (WANs), the Internet, or even private cloud networks.
• WebSockets API uses two-way or full-duplex communication for working. i.e., available data is exchanged between the client and server sides each time.
• Any type of available data transferred using WebSockets API is always faster than HTTP requests.
• WebSocket serves as the API for real time stock data, Stock Options API for Options Chain Data & Implied Volatality (IV) Data and other important metrics.

3) COM APIs

– COM (Component Object Model) APIs execute with the COM Interfaces, such as Windows Runtime or Windows Shell.

– While COM APIs are not explicitly designed for real-time data push, you can leverage their capabilities to create a custom solution that matches the behavior of a Push API.

Here’s a general approach:

1. Create a COM server: Develop a COM server application to receive data updates from a backend system.

2. Implement a push mechanism: Use techniques like polling or event-driven mechanisms within the COM server to check for new data continuously. When new data is available, the server can trigger an event or call a specific method.

3. Expose a COM interface: The COM server should expose a COM interface that clients (other applications) can use to connect and receive notifications.

4. Client-side interaction: Clients can create an instance of the COM server, register for events, or call methods to receive updates.

– Key considerations:

• Performance: Polling can be resource-intensive, especially for frequent updates. Event-driven mechanisms or asynchronous communication can improve performance.

• Reliability: Ensure the COM server and client applications are robust and can handle potential failures or disconnections.

• Security: Implement robust security to avoid any security threat and prevent data loss or unauthorized access.

– While this approach can be practical, it’s generally more straightforward and efficient to use dedicated Push API technologies like WebSocket or Server-Sent Events (SSE), among which more preferable is WebSocket APIs (uses bidirectional communication) rather than SSE APIs (uses unidirectional communication). In contrast, These technologies are designed for real-time data push and offer built-in features and optimizations.

If you’re looking for a reliable and efficient way to implement real-time data push, consider using these dedicated technologies instead of COM APIs.

4) DotNet APIs

• DotNet APIs are created using DotNet languages like C#, VB.NET, ASP.NET, etc. ASP.NET.
• ASP.NET APIs are commonly known as ASP.NET Web APIs (introduced in 2012), as they are built for Web Applications rather than desktop applications.
• ASP.NET Core (introduced in 2016) is the newest version of ASP.NET. It is part of the ASP.NET framework and can run on many popular operating systems, such as Windows, Mac OS X, and Linux.
• The older version of ASP.NET only works on Windows. ASP.NET is cross-platform, hardware compatible, and runs fast with Cloud-based applications. ASP.NET Web APIs function as RESTful APIs.
• However, a desktop application can consume an ASP.NET Web API if it connects to a service over HTTP via the internet.
• A C# Web API can be built with ASP.NET Web API, ASP.NET Core, or even other frameworks, as long as it’s written in C#. Therefore, a C# Web API is framework-independent.
• VB.NET APIs are developed using the VB.NET language, often in combination with frameworks like ASP.NET or ASP.NET MVC.

Types of APIs Offered by GFDL: Leading NSE Stock Realtime API Provider

1) RESTful APIs

• A separate Python library with essential functions for deploying RESTful APIs on your trading Algo Trading App is listed on our website.
• RESTful API acts as API for real-time stock data and other related data for NSE/BSE/MCX.
• GFDL has provided you with a complete Documentation on REST API.

2) WebSockets API

• Are you wondering if there is an NSE API to get stock data, a realtime stock ticker API, or an NSE stock realtime API provider with BSE and other exchanges? If so, you are at the right place!    
• Our service currently supports 250 ticker symbols per segment, out of a total of over 60,000 available symbols.
• We provide market data for nearly all symbols listed on NSE, BSE, and MCX exchanges.
• For a full list of available symbols, please visit the symbols list page on our official website.
• To help with using symbols from NSE, BSE, and MCX, you can refer to our symbol naming conventions for guidance.
• GFDL offers NSE Stock Realtime Data with WebSockets APIs for trading and analysis purposes.
• WebSockets API uses the fastest Bidirectional Communication, i.e., two-way communication between client and server endpoints using TCP (Transmission Control Protocol) without continuous polling or repeated requests. Hence, it is faster than conventional HTTP requests.
• Due to bidirectional communication feature, WebSockets API is traders’ preferred real-time stock feed API or Real time stock API.
• Bidirectional Communication is used to transfer and receive realtime data in both directions between client and server. Hence, a trader can send requests and receive responses in realtime.
• The WebSockets API supports data only in JSON (JavaScript Object Notation) format. JSON is lighter, easier to parse, and easier to read and understand than XML.
• The prime benefit of using WebSockets API is receiving realtime updates from the server without requiring new requests from the client.
• GFDL provides you with Real time Stock Data API in the form of WebSockets API, due to scalable features it have.
• The WebSockets API permits only one active session per server using a single API key. If you create a new session with the same key, the previous session will be terminated, and the response will be returned: “Access Denied, key already in use by another session.”
• The WebSockets APIs Support the Vertical Scaling Method.
• You can find detailed instructions on connecting using the WebSockets API on our website.

3) COM APIs

• COM APIs provided by GFDL serve as Push-Type APIs, i.e., they allow websites to send notifications directly to your web browser, even when you’re not actively using the website. It’s like receiving a text message from a friend, but instead of your phone, it’s your web browser. This enables websites to deliver timely updates and information, improving your overall web experience.
• COM APIs support multiple languages like C++, Java, Python, etc.
• Being an NSE, BSE and MCX Stock Realtime API Provider, GFDL offers COM APIs at affordable prices.
• You can download the Documentation of COM APIs, please click to download here.

4) DotNet APIs

• GFDL provides Realtime data with the lowest latency of 10 milliseconds using DotNet APIs.
• To download the Documentation of DotNet APIs, please check the link here.

What Makes GFDL a Trusted NSE,BSE and MCX Stock Realtime API Provider for Traders & Investors?

GFDL provides the following Key Features as an API Provider.

1) GFDL serves as an Authorized Share Market API Provider for All Financial Markets

GFDL provides Market Data APIs for the Indian stock market and popular indices such as NSE, BSE, NFO, BFO, MCX, CDS, etc. GFDL has been an Authorized Realtime Data Vendor since 2010. Our website has a list of all supported exchanges.

2) GFDL uses fastest Cloud Platforms to Serve APIs & Market Data

To increase the efficiency of APIs, a trader must have a robust and integrated system. The Charting Platform must be integrated with the APIs to access the realtime data for trading or analysis purposes. To achieve this necessity, GFDL provides the APIs that can be deployed with the fastest Cloud Platforms, such as Microsoft Azure, GCP (Google Cloud Platform) & AWS (Amazon Web Service), which cover more than 60% of the Cloud Market. Hence, GFDL is the fastest NSE Stock Realtime API Provider in India.

3) GFDL provides both Vertical & Horizontal Scaling for APIs Scaling

Horizontal Scaling is also known as scaling out, which means adding additional nodes or servers to the existing server. Vertical Scaling is called scaling up, which means adding additional CPUs to meet specific requirements like sending multiple responses or requests. Vertical scaling is done to scale the storage and memory cores or enhance the speed of networks used to transfer the data upon requests by the client. APIs provided by GFDL support both Vertical & Horizontal Scaling as per the need to manage multiple requests to fulfill the need for real-time data. We empower our APIs. We use Cloud Platforms supporting Vertical & Horizontal Scaling, such as AWS (Amazon Web Service), GCP (Google Cloud Platform), and Microsoft Azure.

4) GFDL offers a complete Documentation for the APIs

For the appropriate use of APIs, a trader needs documentation. GFDL provides detailed Documentation for all types of APIs with multiple function lists on our website. You can find a complete Comparison List for the reference.

5) Our APIs easily integrate with 25+ Charting & Analysis Software Platforms

Global Datafeeds API integrates with more than 25+ charting platforms. A complete list of Supporting Platforms is available on our website.

6) GFDL Servers provide Quick Uptime & No Downtime

GFDL has highly scalable backup servers with 99.995% Uptime for fast data delivery across different networks. Our servers have almost no or minimal latency of 1 millisecond intervals without Downtime. So traders can always get updated data without any delay.

7) APIs are available at affordable costs

GFDL has been an L1 Data Vendor since 2010. We believe in Quality & Security. Our APIs are affordable for cost and efficiency. GFDL offers budget-friendly and competitive API services.

How Many Types of Low Latency API Data for Java, Python & Dot Net-based Desktop Applications?

GFDL has been the NSE’s Trusted Market Data Vendor and the Lead NSE Stock Real-Time API Provider for more than 13+ years.

We provide the following types of financial data through our powerful API(s) at an affordable cost. GFDL has consistently provided top-notch services, offering our own data products for subscribers and the following types of financial data through our powerful API(s).

1) Realtime Data API –

GFDL’s real-time data is updated every second with minimum latency. It is available for NSE Stocks, NSE Indices, NSE F&O, NSE Currency, MCX, BSE Stocks, BSE Indices, and BSE F&O. This is Level 1 (L1) data, which contains the best primary bid and ask prices.

2) Streaming Live Data API –

The Streaming Live Data API offered by GFDL provides access to real-time information or market depth. Using the Streaming Live Data API (or Stock Live Data API), you will receive Level 1 market depth data, updated every second. This data includes the current highest or best bid size, bid price, and ask size with price. It also shows the most recent traded bid and ask sizes, prices, and trading volume. This gives you real-time information to track market activity and make trading decisions.

3) History of Greeks in API –

• The History of Greeks API is used to analyze the historical Greek data at the end of the day.
• Complete documentation of Greeks API is available on our website.
• Last Quote Option Greeks API is a part of Greeks API; it returns the Last Traded Option Greek values of Single Symbol (detailed).

4) Real time Quotes API

• GFDL provides you with Realtime Quotes API, which serves to provide you with complete real-time quotes, which include Average Traded Price (VWAP), Close (previous Day’s Close), Open, High, Low, (OHLC Data), Last Trade Price, Last Trade Qty, Total Qty Traded, Buy Price (Bid), Buy Qty (Bid Size), Sell Price (Ask), Sell Qty (Sell Size), Open Interest (OI Data), Quotation Lot (Lot Size), Value (Turnover), Pre Open (if PreOpen), Price Change (Change in Price compared to previous trading day’s Close), Price Change Percentage (Percentage Change in Price compared to last trading day’s Close), Open Interest Change (Change in Open Interest compared to previous trading day’s Close).
• A complete documentation of Real time quotes API is given on our website, it is part of RESTful APIs.

5) Realtime OptionChain API –

The Real-time OptionChain API from GFDL provides the real-time price of the entire options chain of the underlying (for example, NIFTY, BANKNIFTY, FINNIFTY, RELIANCE, etc.) using a single call or using just one API request. 

6) Realtime Option Greeks API –

The Realtime Option Greeks API offered by GFDL lets you get essential data for real-time options trading. This data includes Implied Volatility (IV), Delta, Theta, Vega, Gamma, and over 16 other crucial matrices in a single request. So, instead of making multiple requests for each metric, the API wraps all the data in one response to save time. It means you get all the information you need at once without asking for each piece of data when required.

7) Realtime Exchange Snapshot API –

GFDL provides the entire exchange’s Real-Time Exchange Snapshot data using the Realtime Exchange Snapshot API. This API downloads the live data using a single request. The live data fetched by this API contains the entire exchange section, such as NSE (National Stock Exchange of India), BSE, CDS, MCX, etc. It provides a quick and efficient way to view the market in real time. Currently, the supported periods are minutes (1,2,5,10,15,30), hours, and days (end-of-day).

Does GFDL provide Technical Support for API integration or error handling?

GFDL provides prompt and expert technical support via phone and email. If you have an execution error, our technical support will give the proper guidance and support during Working Hours except for Sundays or Stock Exchange Holidays. Kindly visit our Technical Support Page for more details.

Does GFDL provide a Trial for APIs that work for the NSE, BSE, NFO, BFO, MCX, CDS, and other Exchanges?

Yes, we provide a Free Trial for all APIs, including real-time, historical, snapshot, delayed, end-of-day, entire exchange, option chain, option-greeks data, etc. Just request a Free Trial. The APIs offered by GFDL support ALL Exchange Segments, such as NSE (NSE Equity), BSE (BSE Equity), NSE F&O (Futures & Options Segment), BSE F&O (Futures & Options Segment), NSE CDS (Currency Derivatives Segment), MCX (Commodities).

How much does NSE Data API Cost?

If you have a pre-sales query, you can contact our API Representative.

How will you get the pricing details for the Realtime stock market data API at GFDL?

GFDL offers a stock market Real-Time API with Flexible Pricing. For more details on the best Real-Time stock API available, kindly refer to the API Pricing page.

Which Operating Systems are supported by Global Datafeeds APIs?

GFDL APIs support widely used Operating Systems such as Windows, Linux & Unix. 

Which Programming Languages are Supported by Global Datafeeds APIs?

Global Datafeeds APIs support procedural programming languages like C, Object-Oriented Programming Languages like C++, Python, Java, PHP, C-Sharp, Visual Basic, Scripting languages like JavaScript, Runtime environments like Node.js, and much more. We are Python stock data providers, and you can retrieve stock data with our APIs using Python.

How to buy the APIs from GFDL?

If you need the market data API for your charting platform, contact our APIs Sales Team.

Do APIs can be used for commercial purposes?

APIs provided by GFDL are to be used for personal use only; if you want to buy them for commercial purposes, you have to sign an agreement with the respective exchanges and pay for them. Please refer to the eligibility criteria for commercial purposes given on our website. Kindly refer to our Terms and Conditions before placing an order.

Does GFDL offer a refund after placing an API order?

GFDL does not offer refunds after delivering the APIs. Please read our refund policy carefully, and also read our Disclaimer for further clarity.

Let us know if you have any specific needs or questions about GFDL’s API services. We’re here to help in any way we can.