Best Stock Market APIs — Worldwide Markets & Exchanges

An API (Application Programming Interface) is a set of rules and protocols that allows different software applications to communicate and interact with each other. It defines the methods, data formats, and conventions that developers should use when building software components or services that need to interact with each other.

In simpler terms, an API specifies how different software systems should interact, allowing them to exchange data and perform various functions. It serves as an interface or contract between different software components, enabling them to work together seamlessly.

APIs can be found in various forms, such as web APIs, library APIs, operating system APIs, or database APIs. Web APIs, in particular, are commonly used to enable communication between web applications or between a web application and a server. They are often based on standard web protocols like HTTP (Hypertext Transfer Protocol) and use data formats like JSON (JavaScript Object Notation) or XML (eXtensible Markup Language) to exchange data.

APIs are widely used in software development to facilitate integration between different systems, enable third-party developers to build applications on top of existing platforms, and promote interoperability between diverse software components. They provide a standardized way for developers to access and use the functionality provided by another software system without needing to understand the internal workings of that system.

Stock Market — Basics? 🤔☁️

The stock market refers to a marketplace where shares of publicly traded companies are bought and sold. It is a platform where investors can trade stocks, which represent ownership in companies, and participate in the buying and selling of securities.

The stock market serves several purposes:

• Capital Raising: Companies can issue shares to raise capital for various purposes, such as expanding their operations, funding research and development, or paying off debts. When a company goes public, it offers its shares to the public through an initial public offering (IPO) and gets listed on a stock exchange.
• Investment Opportunities: The stock market provides individuals and institutional investors with an opportunity to invest in companies and potentially earn returns. Investors can buy shares in the hope that their value will increase over time, allowing them to sell at a higher price and make a profit. Additionally, some stocks pay dividends, which are periodic distributions of a company’s profits to shareholders.
• Liquidity: The stock market offers liquidity, allowing investors to buy and sell shares easily. Investors can enter and exit their positions, converting their investments into cash relatively quickly.
• Price Discovery: The stock market serves as a platform for price discovery, reflecting the supply and demand dynamics of stocks. Through the interactions of buyers and sellers, stock prices are determined based on market sentiment, economic factors, company performance, and other relevant information.

Stock markets operate through exchanges, which are organized marketplaces where stocks are listed and traded. Some well-known stock exchanges include the New York Stock Exchange (NYSE) in the United States, the London Stock Exchange (LSE) in the UK, and the Tokyo Stock Exchange (TSE) in Japan. In addition to traditional exchanges, there are also electronic trading platforms where stocks are bought and sold electronically.

It’s important to note that investing in the stock market carries risks, as stock prices can be volatile and influenced by various factors. Investors need to conduct research, assess their risk tolerance, and consider their investment goals before participating in the stock market. Many individuals and institutional investors rely on financial advisors or brokerage firms to navigate the complexities of the stock market and make informed investment decisions.

Why do we need Stock Market APIs? 😲

Stock market APIs are used for various purposes related to accessing and interacting with stock market data programmatically. Here are some reasons why stock market APIs are commonly used:

• Real-Time Data: Stock market APIs provide real-time or near-real-time data on stock prices, trading volumes, market indices, company financials, and other relevant information. This data is essential for traders, investors, financial analysts, and developers who need up-to-date market information for decision-making, analysis, or building financial applications.
• Market Research and Analysis: APIs allow developers to retrieve historical data and perform advanced analytics on stock market data. By accessing historical price data, market trends, and company financials, researchers and analysts can gain insights into market behavior, conduct backtesting, develop trading strategies, and generate statistical models.
• Trading and Portfolio Management: APIs enable developers to build trading platforms, algorithmic trading systems, and portfolio management tools. These applications can place trades, execute orders, monitor portfolios, and provide real-time notifications based on predefined rules. APIs also facilitate the integration of trading systems with brokerage services, allowing investors to trade stocks directly from within an application.
• Financial Applications and Services: Stock market APIs are used to power financial applications and services, such as stock market news aggregators, financial research platforms, robo-advisors, investment tracking tools, and stock screeners. These applications rely on stock market data to deliver personalized insights, investment recommendations, and financial information to their users.
• Integration with Other Systems: APIs allow stock market data to be integrated with other systems and platforms. For example, financial news websites may embed real-time stock quotes within their articles, or mobile applications may display stock market data alongside other financial information. Integration with APIs enables seamless data flow and enhances the functionality of various applications.
• Back-End Infrastructure: Financial institutions and trading firms use stock market APIs to integrate their systems with market data providers, trading platforms, and exchanges. APIs facilitate the efficient retrieval and processing of data, enabling these entities to streamline their operations, automate processes, and connect with external services.

Overall, stock market APIs provide developers with the means to access, analyze, and utilize stock market data programmatically, enabling the creation of innovative financial applications, research tools, and trading systems. They play a crucial role in democratising access to stock market information and empowering individuals and businesses to participate in the financial markets.

The Main Agenda — Best Stock Market APIs — Worldwide Markets

Stock market APIs can be distinguished based on several qualities or characteristics. Here are some common qualities that differentiate stock market APIs:

• Data Coverage: APIs vary in terms of the breadth and depth of data they provide. Some APIs offer comprehensive coverage, including real-time stock prices, historical data, company fundamentals, market indices, and news feeds. Others may focus on specific types of data, such as price quotes or financial statements. The extent of data coverage is an important consideration depending on the specific use case or requirements.
• Real-Time Updates: The timeliness of data updates is crucial for applications requiring real-time market information. Some APIs provide real-time or near-real-time data, delivering instantaneous updates as soon as new market data becomes available. Other APIs may have a slight delay or offer delayed data feeds, which might be sufficient for certain use cases that don’t require immediate updates.
• Historical Data Availability: The availability of historical data is important for backtesting trading strategies, conducting research, and performing data analysis. APIs may differ in terms of the length and granularity of historical data they provide. Some APIs offer extensive historical data spanning several years, while others may have limited historical data or provide aggregated data at specific intervals.
• Data Formats: APIs can support different data formats for delivering stock market data. Common formats include JSON (JavaScript Object Notation), XML (eXtensible Markup Language), CSV (Comma-Separated Values), or proprietary formats specific to the API provider. The choice of data format may depend on the developer’s preferences, compatibility with existing systems, and ease of data parsing and processing.
• Authentication and Access Control: APIs may require authentication mechanisms to control access to data and ensure security. Some APIs provide public access with limited functionality, while others require authentication keys or tokens for authentication and authorization purposes. Access control mechanisms may also determine the level of data access, such as free or paid subscription tiers with varying data limits or premium features.
• Documentation and Support: The quality of documentation and developer support provided by the API provider is essential for developers to understand and integrate the API effectively. Well-documented APIs offer clear and comprehensive documentation, including usage examples, code samples, and explanations of API endpoints and parameters. Developer support, such as community forums, dedicated support channels, or SDKs (Software Development Kits), can greatly assist developers in troubleshooting issues and getting assistance when needed.
• Rate Limits and Usage Policies: APIs often have rate limits and usage policies to ensure fair usage and prevent abuse. Rate limits define the number of API requests that can be made within a specific time period. API providers may impose different rate limits based on the subscription level or user type. Understanding and considering rate limits is crucial when building applications that rely heavily on API calls.

These qualities help developers evaluate and select the most suitable stock market API based on their specific needs, data requirements, and the functionality they aim to achieve in their applications or systems.

If you are looking for DEX trading data, check out Bitquery.

1. Financial Modeling Prep API

API Pricing

• Financial Modeling Prep API offers both free and paid plans.
• The free plan allows limited access to the API with a certain number of requests per month.
• Paid plans offer higher request limits and additional features, with pricing based on the number of requests required.

(Get 10% off using this link)

Features

• Real-time and historical financial data: The API provides access to a wide range of financial data, including stock prices, company financial statements, economic indicators, and more.
• Global coverage: It offers data for companies listed on major stock exchanges worldwide, making it suitable for international financial analysis.
• Easy integration: The API is designed to be easy to integrate into various applications and platforms, with support for multiple programming languages.
• Customizable data retrieval: Users can specify the data they need, such as specific financial ratios, key performance indicators, or specific time periods.
• Data enrichment: The API provides additional data points, such as market capitalization, dividend yield, and earnings per share, to enhance financial analysis.
• Developer-friendly documentation: Financial Modeling Prep API offers comprehensive documentation, including code examples and tutorials, to assist developers in utilizing the API effectively.
• Support: Financial Modeling Prep API offers support to users through documentation, FAQs, and a support team to address any issues or queries.
• Data accuracy: While the API strives to provide accurate financial data, users should know that occasional discrepancies or delays may occur due to external data sources.
• Security: Financial Modeling Prep API ensures data security through encryption and follows industry-standard security practices to protect user information.

Pros

• Wide range of financial data: The API offers access to a comprehensive set of financial data, allowing users to perform in-depth financial analysis.
• Global coverage: With data from major stock exchanges worldwide, the API caters to users interested in international financial markets.
• Customizable data retrieval: Users can specify the exact data they need, enabling them to focus on specific financial metrics or time periods.
• Easy integration: The API is designed to be easily integrated into various applications and platforms, making it convenient for developers.
• Data enrichment: The API provides additional data points that can enhance financial analysis and decision-making.

Cons

• Limited free plan: The free plan has certain limitations on the number of requests per month, which may not be sufficient for users with high data retrieval needs.
• Pricing based on requests: The paid plans are priced based on the number of requests required, which may result in higher costs for users with extensive data requirements.
• Reliance on third-party data: Financial Modeling Prep API relies on external data sources, which may introduce potential delays or inaccuracies in the data.

Stock Options Data APIs

2. Alpha Vantage

Alpha Vantage is a financial data provider that offers a range of financial market data and analytics. Let’s explore its features, pros and cons based on different aspects:

Official Documentation: [Link]
Alpha Vantage Finance API Pricing

Free: 500 requests per day
Basic: $19/month
Standard: $49/month
Premium: $99/month

Data Coverage
Alpha Vantage provides comprehensive coverage of global financial markets, including stocks, ETFs, forex, cryptocurrencies, futures, options, and more. It offers a wide range of data points, such as stock prices, technical indicators, fundamental data, company information, and sector performance.

Real-Time Updates
Alpha Vantage offers real-time data updates for various financial instruments. Users can access up-to-date market information, including stock prices, within their applications. However, real-time data availability may vary based on the specific data source and subscription plan.

Historical Data Availability
Alpha Vantage provides historical data for backtesting, analysis, and research purposes. The availability and depth of historical data may depend on the specific instrument and timeframe required.

Data Formats
Alpha Vantage delivers data in JSON and CSV formats, allowing for easy integration into different applications and programming languages. The JSON format is widely used and well-documented, simplifying the integration process.

Authentication and Access Control
Alpha Vantage requires an API key for authentication and access control. Users need to sign up for an account and obtain an API key to access their data services. Access control ensures that only authorized users can access the data.

Documentation and Support
Alpha Vantage offers comprehensive documentation, including API references, sample code, and integration guides. It provides support through a community forum and email support for addressing technical inquiries or issues.

Rate Limits and Usage Policies
Alpha Vantage enforces rate limits to manage API usage and prevent abuse. The rate limits may vary based on the subscription plan, ranging from free-tier access with limited requests per minute to higher-tier plans with increased limits.

Price
Alpha Vantage offers different subscription plans, including free-tier access and premium plans with additional features and higher data limits. Pricing details and plan options can be found on their website.

Reviews
Alpha Vantage has received generally positive reviews for its comprehensive financial data coverage, ease of integration, and competitive pricing. Users appreciate the availability of real-time and historical data, as well as the simplicity of their API. As with any service, it’s advisable to research and evaluate reviews from multiple sources to gain a well-rounded perspective.

Pros of Alpha Vantage
- Wide coverage of financial instruments and data points.
- Real-time data updates for many financial instruments.
- Availability of historical data for analysis and backtesting.
- Data formats suitable for easy integration into applications.
- Comprehensive documentation and community support.
- Offers a free-tier plan with access to basic data.

Cons of Alpha Vantage
- Real-time data availability may be limited for certain instruments.
- Historical data depth may vary based on the specific instrument and timeframe.
- Higher-tier plans may be required for access to premium features and increased rate limits.
- Some users may require more specialized or niche data sets that may not be available.

When considering Alpha Vantage or any financial data provider, it’s crucial to evaluate your specific requirements, such as data coverage, real-time capabilities, historical data needs, pricing, and support. Additionally, consider any unique requirements for your project or research and compare Alpha Vantage with other data providers to determine the best fit for your specific use case.

Also Read: Crypto APIs for Developers

3. Quandl

Quandl is a financial data platform that provides access to a wide range of financial and alternative data. Here’s an overview of the key aspects of Quandl, including its features, pros and cons:

Official Documentation: [Link]
Quandl Finance API Pricing:

Free: 500 requests per day
Bronze: $10/month
Silver: $25/month
Gold: $50/month
Platinum: Custom pricing

Data Coverage
Quandl offers extensive coverage of financial data, including stock prices, indices, futures, options, bonds, commodities, and more. It also provides alternative data sets, such as economic indicators, sentiment analysis, and social media data.

Real-Time Updates
Quandl offers real-time data updates for certain financial instruments, allowing users to access the latest market information. Real-time data availability depends on the specific data source and subscription plan.

Historical Data Availability
Quandl provides a vast amount of historical data, spanning several decades for various financial instruments. This enables users to perform in-depth historical analysis, backtesting, and research.

Data Formats
Quandl offers data in various formats, including JSON, CSV, and Excel, providing flexibility for integration into different applications and systems.

Authentication and Access Control
Quandl requires authentication through an API key for accessing its data services. This ensures secure and authorized access to the data. Users can manage their API keys and define access controls based on their subscription plans.

Documentation and Support
Quandl provides comprehensive documentation, including API references, tutorials, and guides, to assist users in integrating and utilizing their data. They also offer customer support to address any technical inquiries or issues.

Rate Limits and Usage Policies
Quandl enforces rate limits to manage API usage and ensure fair access for all users. The rate limits may vary based on the subscription plan or data source. Users are encouraged to review and adhere to the usage policies to avoid disruptions in service.

Price
Quandl offers various subscription plans with different levels of data access and features. Pricing depends on factors such as the data coverage, frequency of updates, and level of support required. Users can find detailed pricing information on the Quandl website.

Reviews
Quandl has generally received positive reviews for its extensive financial data coverage, reliability, and the availability of alternative data sets. Users appreciate the high-quality data, historical depth, and the ease of integration. It’s advisable to research and evaluate reviews from multiple sources to gain a comprehensive understanding.

Pros of Quandl
- Wide coverage of financial and alternative data sets.
- Availability of real-time updates for certain instruments.
- Extensive historical data for in-depth analysis and research.
- Provides data in multiple formats for easy integration.
- Comprehensive documentation and customer support.

Cons of Quandl
- Some advanced features or specific data sources may require higher-tier subscription plans.
- Pricing can vary based on the level of data access and support required.
- Users with very specific or niche data requirements may need to explore additional data providers.

When considering Quandl or any financial data provider, it’s essential to evaluate your specific needs, such as data coverage, real-time capabilities, historical data availability, pricing, and support. Additionally, consider any unique requirements for your project or research and compare Quandl with alternative data providers to determine the best fit for your specific use case.

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4. Tiingo

Tiingo is a financial data platform that offers a range of data services for investors, developers, and researchers. Let’s explore its features, pros and cons based on different aspects:

Official Documentation: [Link]
Tiingo Finance API Pricing:

Starter: $0/month
Power: $30/month

Data Coverage
Tiingo provides comprehensive coverage of financial markets, including stocks, ETFs, mutual funds, options, and indices. It offers a wide range of data points, such as historical prices, dividends, splits, corporate actions, financial statements, and more.

Real-Time Updates
Tiingo offers real-time data updates for various financial instruments, including stock prices, within seconds of the latest market activity. This enables users to access up-to-date market information for timely decision-making.

Historical Data Availability
Tiingo provides extensive historical data, allowing users to access historical prices, corporate actions, and financial statements spanning multiple decades. This facilitates backtesting, historical analysis, and research.

Data Formats
Tiingo delivers data in JSON format, making it easy to integrate into different applications and programming languages. The JSON format is well-documented and widely supported, simplifying the integration process.

Authentication and Access Control
Tiingo requires an API key for authentication and access control. Users need to sign up for an account and obtain an API key to access Tiingo’s data services. Access control ensures secure and authorized access to the data.

Documentation and Support
Tiingo offers comprehensive documentation, including API references, tutorials, and guides. They provide developer support to assist with technical inquiries or issues that users may encounter during integration.

Rate Limits and Usage Policies
Tiingo enforces rate limits to manage API usage and prevent abuse. The rate limits may vary based on the subscription plan or tier. It’s important to review and adhere to the usage policies to ensure compliance and avoid disruptions in service.

Price
Tiingo offers different subscription plans, including free-tier access with limited features and premium plans with additional data coverage and higher rate limits. Pricing details and plan options can be found on their website.

Reviews
Tiingo has received positive reviews for its comprehensive financial data coverage, including real-time and historical data, as well as its ease of use and reliability. Users appreciate the quality of the data and the competitive pricing offered. As always, it’s recommended to research and evaluate reviews from multiple sources for a balanced perspective.

Pros of Tiingo
- Comprehensive coverage of financial instruments and data points.
- Real-time data updates for timely decision-making.
- Extensive historical data for analysis and research.
- Data delivered in a well-supported JSON format.
- Comprehensive documentation and developer support.
- Offers a free-tier plan with basic data access.

Cons of Tiingo
- Advanced features and additional data coverage may require higher-tier subscription plans.
- Real-time data availability may be limited for certain instruments.
- Rate limits and usage policies may impact high-frequency or large-scale data consumption.
- Some users may require more specialized or niche data sets that may not be available.

When considering Tiingo or any financial data provider, it’s important to evaluate your specific requirements, such as data coverage, real-time capabilities, historical data needs, pricing, and support. Additionally, consider any unique requirements for your project or research and compare Tiingo with other data providers to determine the best fit for your specific use case.

Also Read: Bitcoin API

5. Xignite

Xignite is a financial data provider that offers a wide range of market data and financial information. Let’s explore its features, pros and cons based on different aspects:

Official Documentation: [Link]
Xignite Finance API Pricing:

Basic: $299/month
Standard: $499/month
Premium: $999/month

Data Coverage
Xignite provides extensive data coverage across various asset classes, including equities, options, futures, commodities, currencies, bonds, and more. It offers a comprehensive set of data points, including real-time and historical prices, reference data, corporate actions, financial statements, and fundamental data.

Real-Time Updates
Xignite offers real-time data updates for a variety of financial instruments. Users can access up-to-date market information, including stock prices, within their applications, enabling timely decision-making.

Historical Data Availability
Xignite provides historical data with deep historical coverage, allowing users to access data points spanning several decades. This facilitates backtesting, historical analysis, and research.

Data Formats
Xignite delivers data in multiple formats, including JSON, XML, and CSV. This flexibility allows for easy integration into different applications and systems, accommodating various programming languages and platforms.

Authentication and Access Control
Xignite employs authentication and access control mechanisms to ensure secure and authorized access to its data services. Users are required to authenticate using API keys or other authentication methods to access the data.

Documentation and Support
Xignite offers comprehensive documentation, including API references, integration guides, and sample code, to assist users in integrating and utilizing their data services. They provide technical support to address any inquiries or issues that users may encounter.

Rate Limits and Usage Policies
Xignite enforces rate limits to manage API usage and ensure fair access for all users. The rate limits may vary based on the subscription plan or tier. Users are encouraged to review and comply with the usage policies to avoid disruptions in service.

Price
Xignite offers different pricing plans tailored to the specific needs of users, including enterprise solutions and customized packages. Pricing details can be obtained by contacting Xignite directly.

Reviews
Xignite has generally received positive reviews for its extensive data coverage, reliability, and the quality of its financial data. Users appreciate the ease of integration, comprehensive documentation, and the responsiveness of their customer support team. As always, it’s recommended to research and evaluate reviews from multiple sources to get a comprehensive understanding.

Pros of Xignite
- Comprehensive coverage of various asset classes and data points.
- Real-time data updates for timely decision-making.
- Extensive historical data availability for analysis and research.
- Supports multiple data formats for easy integration.
- Comprehensive documentation and developer support.
- Offers enterprise solutions and customized packages.

Cons of Xignite
- Pricing details may not be readily available and can vary depending on the specific requirements.
- Some advanced features or specific data sets may require higher-tier subscription plans.
- Rate limits and usage policies may impact high-frequency or large-scale data consumption.

When considering Xignite or any financial data provider, it’s important to evaluate your specific requirements, such as data coverage, real-time capabilities, historical data needs, pricing, and support. Additionally, consider any unique requirements for your project or research and compare Xignite with other data providers to determine the best fit for your specific use case.

Also Read: Ethereum API

6. Yahoo Finance API

Yahoo Finance API is a widely used financial data API that provides access to a range of market data and financial information. Let’s explore its features, pros and cons based on different aspects:

Official Documentation: [Link]
Yahoo Finance Finance API Pricing

Custom Pricing

Data Coverage
Yahoo Finance API offers comprehensive coverage of various financial instruments, including stocks, ETFs, mutual funds, indices, currencies, and more. It provides a wide range of data points such as historical prices, real-time quotes, fundamentals, company information, and financial statements.

Real-Time Updates
Yahoo Finance API provides real-time data updates for certain financial instruments, allowing users to access the latest market information. However, the availability and timeliness of real-time data may vary depending on the specific data source and instrument.

Historical Data Availability
Yahoo Finance API offers historical data for backtesting, analysis, and research purposes. Users can access historical prices, dividends, splits, and other historical data points, which span several years or even decades.

Data Formats
Yahoo Finance API delivers data in JSON format, making it easily integrable into different applications and programming languages. JSON is a well-supported and widely used data format in the developer community.

Authentication and Access Control
Yahoo Finance API does not require authentication or access control, as it is publicly available for general use. Users can access the API endpoints without the need for API keys or authentication tokens.

Documentation and Support
Yahoo Finance provides limited official documentation for their API. However, there are community-developed libraries and resources available that provide additional documentation and support to assist users in integrating and utilizing the API effectively.

Rate Limits and Usage Policies
Yahoo Finance API does not have official rate limits or usage policies publicly defined since it is a free service. However, it is recommended to respect reasonable usage and not abuse the service.

Price
Yahoo Finance API is free to use, which makes it an attractive option for developers and researchers who require basic financial data without incurring additional costs.

Reviews
Yahoo Finance API has garnered mixed reviews over time. While it is widely used due to its popularity and availability of free financial data, some users have reported occasional data inconsistencies, limited documentation, and reliability issues. It’s advisable to research and evaluate reviews from multiple sources to get a balanced understanding.

Pros of Yahoo Finance API
- Comprehensive coverage of various financial instruments and data points.
- Availability of real-time and historical data for analysis and research.
- Free to use without any subscription or payment requirements.
- JSON format for easy integration into applications.
- Popular and widely used by the developer community.

Cons of Yahoo Finance API
- Limited official documentation and support.
- Reliability and data consistency issues reported by some users.
- Lack of rate limits or usage policies, potentially impacting service stability.
- Real-time data availability may not be consistent or timely for all instruments.

When considering Yahoo Finance API or any financial data provider, it’s important to evaluate your specific requirements, such as data coverage, real-time capabilities, historical data needs, reliability, and support. Additionally, consider any unique requirements for your project or research and compare Yahoo Finance API with other data providers to determine the best fit for your specific use case.

7. IEX Cloud

Here is a summary of the data coverage, real-time updates, historical data availability, data formats, authentication and access control, documentation and support, rate limits and usage policies, price, reviews, pros and cons of IEX Cloud:

Official Documentation: [Link]
IEX Cloud Finance API Pricing

Free: 100 requests per day
Pay are you go: Contact Website
Grow: $100/month
Enterprise: Custom pricing

Data Coverage
IEX Cloud offers a wide range of data coverage, including:

• Real-time and historical stock prices
• Fundamental data, such as financial statements and analyst ratings
• Technical indicators, such as moving averages and Bollinger bands
• News feeds
• Cryptocurrency data
• Forex data
• Economic data
• Alternative data

Real-Time Updates
IEX Cloud offers real-time updates for stock prices, fundamental data, and technical indicators. The frequency of updates depends on the data type. For example, stock prices are updated every 15 seconds, while technical indicators are updated every 5 minutes.

Historical Data Availability
IEX Cloud offers historical data for stock prices going back to 2008. The granularity of the historical data depends on the data type. For example, stock prices are available in daily, weekly, and monthly intervals.

Data Formats
IEX Cloud provides data in JSON and CSV formats. JSON is a lightweight data format that is easy to parse and manipulate. CSV is a more traditional data format that is widely used in spreadsheet applications.

Authentication and Access Control
IEX Cloud uses API keys to authenticate users and control access to the API. API keys are free to create and can be used with any programming language.

Documentation and Support
IEX Cloud provides comprehensive documentation and support for its API. The documentation includes API reference, tutorials, and examples. Support is available through email and a forum.

Rate Limits and Usage Policies
IEX Cloud has a generous free tier that allows for 100 requests per day. Paid plans offer higher request limits and other features. The usage policies are clear and easy to understand.

Pricing
The pricing is competitive and the plans offer good value for money.

Reviews
IEX Cloud has a good reputation among users. The API is well-documented and easy to use. The data is accurate and reliable. The support is responsive and helpful.

Pros

• Wide range of data coverage
• Real-time updates for some data types
• Historical data availability for most data types
• JSON and CSV data formats
• Easy to use API
• Comprehensive documentation and support
• Generous free tier

Cons

• Some data is delayed
• Rate limits can be restrictive for high-volume users

Overall, IEX Cloud is a great choice for developers who need access to financial market data. The API is well-designed and easy to use, and the data is accurate and reliable. The pricing is competitive and the free tier is very generous. However, IEX Cloud does not offer real-time updates for all data types and can be expensive for high-volume users.

8. EOD Historical Data API

Here is a summary of the data coverage, real-time updates, historical data availability, data formats, authentication and access control, documentation and support, rate limits and usage policies, price, reviews, pros and cons of EOD Historical Data API:

Official Documentation: [Link]
EOD Historical Data Finance API Pricing

• Free plan: 20 API Calls per day
• All in one — Package: $79.99/month
• All world — Package: $19.99/month
• All world Extended — Package: $29.99/month
• Fundamentals Data — Package: $49.99/month

Data Coverage

• EOD Historical Data API offers a wide range of data coverage, including:
• End-of-day stock prices
• Fundamental data, such as financial statements and analyst ratings
• Technical indicators, such as moving averages and Bollinger bands
• News feeds
• Cryptocurrency data
• Forex data
• Economic data
• Alternative data

Real-Time Updates
EOD Historical Data API does not offer real-time updates. The data is updated at the end of each trading day.

Historical Data Availability
EOD Historical Data API offers historical data for stock prices going back to 1970. The granularity of the historical data depends on the data type. For example, stock prices are available in daily, weekly, and monthly intervals.

Data Formats
EOD Historical Data API provides data in CSV format. CSV is a more traditional data format that is widely used in spreadsheet applications.

Authentication and Access Control
EOD Historical Data API uses API keys to authenticate users and control access to the API. API keys are free to create and can be used with any programming language.

Documentation and Support
EOD Historical Data API provides comprehensive documentation and support for its API. The documentation includes API reference, tutorials, and examples. Support is available through email and a forum.

Rate Limits and Usage Policies
EOD Historical Data API does not have any rate limits or usage policies.

Price
EOD Historical Data API offers a single plan that costs $99/month. The plan includes access to all of the data and features offered by the API.

Reviews
EOD Historical Data API has a good reputation among users. The API is well-documented and easy to use. The data is accurate and reliable. The support is responsive and helpful.

Pros

• Wide range of data coverage
• Historical data availability for most data types
• CSV data format
• Easy to use API
• Comprehensive documentation and support
• No rate limits or usage policies

Cons

• No real-time updates
• Can be expensive for high-volume users

Overall, EOD Historical Data API is a great choice for developers who need access to historical financial market data. The API is well-designed and easy to use, and the data is accurate and reliable. The pricing is competitive and the single plan is very affordable. However, EOD Historical Data API does not offer real-time updates and can be expensive for high-volume users.

9. OpenFin API

Here is a summary of the data coverage, real-time updates, historical data availability, data formats, authentication and access control, documentation and support, rate limits and usage policies, price, reviews, pros and cons of OpenFin API:

Official Documentation: [Link]
OpenFin Finance API Pricing

Free: 100 requests per day
Starter: $7/month
Pro: $29/month
Enterprise: Custom pricing

Data Coverage
OpenFin API offers a wide range of data coverage, including:

• Real-time and historical stock prices
• Fundamental data, such as financial statements and analyst ratings
• Technical indicators, such as moving averages and Bollinger bands
• News feeds
• Cryptocurrency data
• Forex data
• Economic data
• Alternative data

Real-Time Updates
OpenFin API offers real-time updates for stock prices, fundamental data, and technical indicators. The frequency of updates depends on the data type. For example, stock prices are updated every 15 seconds, while fundamental data is updated every 15 minutes.

Historical Data Availability
OpenFin API offers historical data for stock prices going back to 2010. The granularity of the historical data depends on the data type. For example, stock prices are available in daily, weekly, and monthly intervals.

Data Formats
OpenFin API provides data in JSON, CSV, and XML formats. JSON is a lightweight data format that is easy to parse and manipulate. CSV is a more traditional data format that is widely used in spreadsheet applications. XML is a more complex data format that is used for structured data.

Authentication and Access Control
OpenFin API uses API keys to authenticate users and control access to the API. API keys are free to create and can be used with any programming language.

Documentation and Support
OpenFin API provides comprehensive documentation and support for its API. The documentation includes API reference, tutorials, and examples. Support is available through email and a forum.

Rate Limits and Usage Policies
OpenFin API has a generous free tier that allows for 100 requests per day. Paid plans offer higher request limits and other features. The usage policies are clear and easy to understand.

Price
OpenFin API offers a free tier and two paid plans. The pricing is competitive and the plans offer good value for money.

Reviews
OpenFin API has a good reputation among users. The API is well-documented and easy to use. The data is accurate and reliable. The support is responsive and helpful.

Pros

• Wide range of data coverage
• Real-time updates for some data types
• Historical data availability for most data types
• JSON, CSV, and XML data formats
• Easy to use API
• Comprehensive documentation and support
• Generous free tier

Cons

• Some data is delayed
• Rate limits can be restrictive for high-volume users

Overall, OpenFin API is a great choice for developers who need access to financial market data. The API is well-designed and easy to use, and the data is accurate and reliable. The pricing is competitive and the free tier is very generous.

10. Marketstack API

Here is a summary of the data coverage, real-time updates, historical data availability, data formats, authentication and access control, documentation and support, rate limits and usage policies, price, reviews, pros and cons of Marketstack:

Official Documentation: [Link]
Marketstack Finance API

Free: 100 requests/mo
Basic: $9.99/month
Professional: $49.99/month
Business: $149.99/month
Enterprise: Custom pricing

Data Coverage
Marketstack offers a wide range of data coverage, including:

• Real-time and historical stock prices
• Fundamental data, such as financial statements and analyst ratings
• Technical indicators, such as moving averages and Bollinger bands
• News feeds
• Cryptocurrency data
• Forex data
• Economic data
• Alternative data

Real-Time Updates
Marketstack offers real-time updates for stock prices and some technical indicators. The frequency of updates depends on the data type. For example, stock prices are updated every 15 seconds, while technical indicators are updated every 5 minutes.

Historical Data Availability
Marketstack offers historical data for stock prices going back to 2010. The granularity of the historical data depends on the data type. For example, stock prices are available in daily, weekly, and monthly intervals.

Data Formats
Marketstack provides data in JSON and CSV formats. JSON is a lightweight data format that is easy to parse and manipulate. CSV is a more traditional data format that is widely used in spreadsheet applications.

Authentication and Access Control
Marketstack uses API keys to authenticate users and control access to the API. API keys are free to create and can be used with any programming language.

Documentation and Support
Marketstack provides comprehensive documentation and support for its API. The documentation includes API reference, tutorials, and examples. Support is available through email and a forum.

Rate Limits and Usage Policies
Marketstack has a generous free tier that allows for 50 requests per day. Paid plans offer higher request limits and other features. The usage policies are clear and easy to understand.

Price
Marketstack offers a free tier and three paid plans. The pricing is competitive and the plans offer good value for money.

Reviews
Marketstack has a good reputation among users. The API is well-documented and easy to use. The data is accurate and reliable. The support is responsive and helpful.

Pros

• Wide range of data coverage
• Real-time updates for some data types
• Historical data availability for most data types
• JSON and CSV data formats
• Easy to use API
• Comprehensive documentation and support
• Generous free tier

Cons

• Some data is delayed
• Rate limits can be restrictive for high-volume users

Overall, Marketstack is a great choice for developers who need access to financial market data. The API is well-designed and easy to use, and the data is accurate and reliable. The pricing is competitive and the free tier is very generous. However, Marketstack does not offer real-time updates for all data types and can be expensive for high-volume users.

11. Finnhub

Finnhub is a financial data provider that offers various data services to developers and businesses. Here’s an overview of some key aspects of Finnhub, including its features, pros and cons:

Official Documentation: [Link]

Finnhub Finance API Pricing

Free: 100 requests per day
Starter: $9/month
Pro: $49/month
Enterprise: Custom pricing

Data Coverage
Finnhub provides comprehensive coverage of financial data, including real-time stock prices, news, financial statements, analyst recommendations, and more. It covers a wide range of global markets, including stocks, ETFs, forex, and cryptocurrencies.

Real-Time Updates
Finnhub offers real-time updates for stock prices, allowing developers to access up-to-date market data. This feature is crucial for applications that require real-time market information and timely decision-making.

Historical Data Availability
Finnhub provides historical data for various financial instruments, allowing users to analyze and backtest strategies. Historical data availability depends on the specific instrument and timeframe required.

Data Formats
Finnhub provides data in JSON format, which is widely supported and easy to work with for developers. This format enables seamless integration into different applications and programming languages.

Authentication and Access Control
Finnhub requires authentication through an API key to access its data services. This ensures that only authorized users can access and utilize the data. Access control allows users to define permissions and restrictions for their API keys.

Documentation and Support
Finnhub offers comprehensive documentation, including API references, tutorials, and guides to assist developers in integrating and utilizing their data services. They also provide developer support to address any technical issues or questions.

Rate Limits and Usage Policies
Finnhub enforces rate limits to manage API usage and prevent abuse. The rate limits may vary based on the subscription plan. It’s important to review and understand the usage policies to ensure compliance and avoid service interruptions.

Price
Finnhub offers various subscription plans tailored to different needs, ranging from free-tier access with limited features to premium plans with more extensive data coverage and higher rate limits. Pricing details can be found on their website.

Reviews
Finnhub has received positive reviews for its extensive financial data coverage, reliability, and competitive pricing. Developers appreciate the ease of integration and the quality of the data provided. However, it’s always advisable to research and evaluate reviews from multiple sources to gain a comprehensive understanding.

Pros of Finnhub
- Comprehensive coverage of financial data across various global markets.
- Real-time updates for stock prices, enabling timely decision-making.
- Provides historical data for analysis and strategy testing.
- Offers data in a widely supported JSON format for easy integration.
- Provides detailed documentation and developer support.

Cons of Finnhub
- Free-tier access may have limitations in terms of data coverage and rate limits.
- Certain advanced features or data types may require higher-tier subscription plans.
- Some users may require additional data services or more specialized financial data sources for specific use cases.

It’s important to evaluate your specific requirements and compare Finnhub with alternative financial data providers to determine the best fit for your needs. Consider factors such as data coverage, pricing, support, and any unique requirements of your project before making a decision.

Also Read: Blockchain Data APIConclusion

Here is a concluding review of the stock market data APIs that we mentioned:

• Financial Modeling Prep API is a popular API for getting stock market data. It offers a wide range of data, including real-time quotes, delayed quotes, historical data, and fundamental data.
• Alpha Vantage is a great option for getting high-quality stock market data via a developer-friendly API. With 100+ API endpoints and 1000+ open-source libraries, Alpha Vantage is the one-stop-shop for your quantitative investing journey.
• Quandl is another popular API for getting stock market data. It offers a wide range of data, including real-time quotes, delayed quotes, historical data, and fundamental data. Quandl is also relatively affordable, with pricing starting at $15/month.
• Tiingo is a good option for getting historical stock market data. It offers a wide range of historical data, and it is relatively affordable. Tiingo also offers a free plan with limited data.
• Xignite is a good option for getting real-time stock market data. It offers a wide range of real-time data, and it is relatively affordable. Xignite also offers a free plan with limited data.
• Yahoo Finance API is a good option for getting free stock market data. It offers a limited amount of data, but it is a good option for developers who are just getting started. Yahoo Finance API also offers paid plans with more data.
• IEX Cloud is a good option for getting high-quality stock market data. It offers a wide range of data, including real-time quotes, delayed quotes, historical data, and fundamental data. IEX Cloud is also relatively affordable, with pricing starting at $7/month.
• EOD Historical Data API is a good option for getting historical stock market data. It offers a wide range of historical data, and it is relatively affordable. EOD Historical Data API also offers a free plan with limited data.
• OpenFin API is a good option for getting stock market data from a variety of sources. It is a bit more complex to use than some of the other APIs, but it offers a lot of flexibility. OpenFin API is also relatively affordable, with pricing starting at $7/month.
• Marketstack is a good option for getting stock market data from a variety of sources. It is a bit more complex to use than some of the other APIs, but it offers a lot of flexibility. Marketstack is also relatively affordable, with pricing starting at $9/month.

Overall, there are a number of good stock market data APIs available. The best API for you will depend on your specific needs and budget. I hope this review has helped you to narrow down your options.

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