Online Shopping is now part of life for every people nearly in the world. So according to your customer needs, you need to maintain your online shop, you need to gear up it with new functionality on a regular basis.

I am not saying that this post is only for experienced developers, a beginner can also check it only if they have API concept clear.
If not, you can check my API Guide: 

What is API? Why it is important?






I listed out the useful API services for E-commerce from programmableweb.com which is an API directory website.

1: Amazon Product Advertising API

Through this API developers can retrieve product information. The API exposes Amazon’s product data and e-commerce functionality. 

This allows developers, web site publishers and others to leverage the Amazon Product Discovery features that Amazon uses to power its own business, and potentially make money as an Amazon affiliate. 


API Portal Link:
https://docs.aws.amazon.com/AWSECommerceService/latest/DG/Welcome.html

2: Etsy API

API Portal Link: 
https://www.etsy.com/developers/

3: Shopzilla API

API Portal Link: 
http://publisher.shopzilla.com/

4: Magento SOAP API

Magento is a feature-rich, professional open-source eCommerce solution that offers merchants complete flexibility and control over the look, content, and functionality of its online store. 

The Magento SOAP API gives users access to functionality such as export/import of customer/customer addresses


API Portal Link: 
https://devdocs.magento.com/guides/m1x/api/soap/introduction.html

5: Best Buy Products API

Best Buy’s Products API provides full product information for over 1M current and historical products, including pricing, availability, specifications, descriptions, and images.


API Portal Link: 
https://developer.bestbuy.com

6: Bol.com Open API

Bol.com is the biggest online retailer from the Netherlands. Bol.com sells a variety of products, including DVDs, games, music, electronics, computers, and books. 

The Bol.com Open API allows developers to access and integrate the functionality and data of the Bol.com catalog with other websites, applications, affiliated programs, and e-commerce plug-ins.


API Portal Link:  
https://developers.bol.com/documentatie/open-api/ 

7: WooCommerce API

API Portal Link:  
http://docs.woocommercev2.apiary.io/

8: Walmart Open API

API Portal Link: 
 https://developer.walmartlabs.com/

9: BigCommerce API

API Portal Link:   https://developer.bigcommerce.com/api

Programming is a very powerful tool. On the basis of their use, there are many different-2 programming languages.

All programming languages are nearly the same fundamentally but their syntax is little different. We will see this on the basis of print “Hello World” statements in 15+ different programming languages with an example.

Note: There is one thing which is highly useful for beginners who are entering in Programming field which is-
“Master at least one programming language(at least basic parts)” then it will easier for you to learn a new programming language.

API the most useful and common term in current digital world.But what is it? and what is the use of this ,we will going to discuss about it little to get the solid understanding of this API term.


API = Application Programming Interface


An API is a particular set of rules(“code”) and specifications that software programs can follow to communicate with each other.


It provides interface between different software programs and facilitates their interactions , just  like the way the user interface facilitates interaction between humans and computers.


In simple terms we can say that- “ An API is the interface through which you access someone else’s code or through which someone else access yours code .“

If we go with conceptual part then you can say that API works as Interface between two programs.

Consider the Customer,Waiter and Kitchen in above image-
Where customer getting his order through the Waiter from Kitchen ,


Let me explain this-


Consider if the Customer language and Kitchen language are different then how they will communicate?,then the middle man Waiter come who become interface between these two .


Simply in these from API works(as waiter) between different programs/code or applications.

Lets see a real-world example-

So i think ,you get the basic and conceptual understanding of APIs.
APIs are very useful today provide great help in any development(Web application/Mobile Application/Cloud/Machine Learning).

Some popular APIs services are-


Google APIs, Facebook APIs,Twitter APIs,Steam APIs etc

As a web developer, you might be facing challenges to meet the evolving needs of users like – UI/UX, loading time, performance, scalability, cross-platform accessibility & security to name a few. It is vital to pay heed to the anticipated changes in the Web Development Ecosystem.

1-Progressive Web Applications(PWAs)-

• They are similar in Functionality & Features to native mobile apps, PWAs are genuinely web pages or websites but offer the user functionality such as working offline,push-notifications on web browsers. 
• There are many advantages to using PWAs such as the ability to work offline, instant loading, reliability, and impressive GUI. 
• The most important is such websites can be built in less time and are easier to deploy and maintain.

2-Chatbots-

• A chatbot is computer program or an artificial intelligence which conducts a conversation via auditory or textual methods. 
• the essentiality of chatbots will now be the next web development necessity to fortify engagement & conversion rates. 
• Whether your business is related to selling clothes, electronic toys or even software development services, a chatbot plays important role for your website.Basically it provides facility to solve queries related to users with support of 24/7 availability. 

3-The Web of Things-

• The Web of Things is a refinement of the Internet of Things by integrating smart things not only into the Internet (network), but into the Web Applications.
• Practically, Web of Things means you can start interacting with Things(Electronic devices like camera,Mobile,TV,Fan etc) via Web browsers and explore the Web of Things just as you would surf the Web (via links to other related things). Real-time data collected from distributed sensors can then be easily retrieved, processed, and displayed on Web pages using HTML, CSS and JavaScript.
• In the Web of Things, devices and their services are fully integrated in the Web because they use the same standards and techniques as traditional Web sites. This means that you can write applications that interact with embedded devices in exactly the same way as you would interact with any other Web service that uses Web APIs and in particular using RESTful architectures.

Related- Web Development Beginner Guide 




3-Artificial Intelligence-
 

• AI is expanding in every field including gaming to education, hospitality to healthcare,software to software-testing. 
• It’s continuously changing the IT landscape and companies are competing with each other to build up a team of experts of the industry to provide ground-breaking solutions that automate everything. 
• Respect to web applications,the AI  already gained the momentum ,by realizing its potential features  like filtering a different kind of abusive content, recognizing emotions and creating websites through an AI-enabled assistant is trended now.

4-Static Sites Generators-

• Static websites created through generators like Octopress will enable developers to increase security, loading time, and ease of deployment, which somewhere lacks in dynamic websites with extended functionality. 
• These generators do not required a database to create websites, All it needs is the text stored in files. However, static websites have no dynamic content/user content, which has become essential part of the web today.

5-Virtual Reality-

• Virtual reality is an artificial environment that is created with software and presented to the user in such a way that the user suspends belief and accepts it as a real environment.
• Virtual Reality holds the different view because of its unique way of providing the amazing user experience. 
• After dominating the gaming industry by Google Cardboard & Vive, it is transitioning to the web as tech behemoths (Google & Mozilla) started working on APIs to immerse users in the virtual world.

6- User Interface-

• Web developers have always been worried about the user interface of the website. This is just because of the fact that sometimes the best-looking designs fail in terms of functionality  or in providing the information users are looking for.
• So basically reduce this type of problems ,GUI framework play important role in developing the platform.Good balancing with back-end functionality is effect large part of web platform. 

7.Web Development Frameworks-

• Frameworks reduce a lot of  code . The advantage of efficiency will never be underestimated. Application development get boosted and get effective flexibility.
• As far as a framework usually developed and tested by many different developers it can gain a strong level of security. It is extremely likely that many security risks are addressed and tested when the framework is being built.
• Most web development frameworks allow programmers to work with a number of widely used relational databases. Some frameworks further simplify database operations by providing object relational mapping (ORM) systems.The programmers can take advantage of the ORM systems to perform database operations without writing lengthy SQL code.
• The functions and tools provided by Web frameworks help developers to automate common web development tasks like caching, session management, authentication, and URL mapping.