Social Networks History: How It Began and Where It Is Now

The Differences Between APIs and SDKs: A Social Networking Perspective


Over the past few decades, online social networking has transformed the way we connect and share information. What started with simple tools like email and message boards has exploded into a diverse ecosystem of social media apps used by billions worldwide. Two of the key technical innovations that have enabled this growth are Application Programming Interfaces (APIs) and Software Development Kits (SDKs). In this article, we‘ll explore what APIs and SDKs are, how they differ, and the crucial roles they‘ve played in the evolution of social networking.

The Early Days of Social Networking

While modern social media giants like Facebook and Twitter were still years away, the foundations of online social networking were laid in the 1970s and 80s. Email was invented in 1971, allowing people to send electronic messages to each other for the first time. Bulletin Board Systems (BBS) emerged in the late 70s, providing a way for users to post public messages, share files, and play games.

The 1990s saw the birth of the World Wide Web and with it, the first recognizable social media sites. Six Degrees, launched in 1997, was the first to allow users to create profiles and "friend" each other. Other early platforms like LiveJournal and Friendster followed in the early 2000s.

The Rise of MySpace and Facebook

In 2003, MySpace launched and quickly became the most popular social network of its time. It allowed users greater customization of their personal pages and made it easy to discover new music and bands. Just a year later, Facebook began as a college-only network before opening up to the general public in 2006 and surpassing MySpace in users by 2008.

As these major platforms battled for dominance, they also began to open up their platforms to third-party developers through APIs and SDKs. This marked a significant shift in social media, from closed gardens to more open and interconnected ecosystems.

What is an API?

An API, or Application Programming Interface, is a set of rules and protocols that allows different software applications to communicate with each other. It specifies the kinds of requests that can be made, how to make them, the data formats to use, and the conventions to follow. APIs make it possible for the features and data of one application to be used by other applications.

In the context of social media, APIs have been crucial for allowing third-party apps and websites to integrate with the major platforms. For example:

  • The Twitter API allows applications to retrieve tweets, post new tweets, and interact with nearly every feature of Twitter.
  • The Facebook Graph API lets apps access data about Facebook users, pages, groups, and events (with the appropriate permissions).
  • The Instagram API makes it possible for apps to search for and retrieve photos and videos, access user profile information, and more.

By opening up APIs, social media companies enable a broader ecosystem of apps and services while still maintaining a degree of control and oversight.

What is an SDK?

While an API is focused on communication between applications, a Software Development Kit (SDK) is a set of tools and resources used to build applications for a specific platform or system. An SDK typically includes code libraries, debuggers, documentation, sample code, and guides to help developers create software that will run on the target platform.

The major social networks offer SDKs to make it easier for developers to build apps that integrate tightly with their platforms. Some examples:

  • The Facebook SDK for iOS and Android contains libraries and templates for building apps that use Facebook‘s login system and social graph.
  • The Twitter SDK enables developers to embed Twitter content in their apps, use the Twitter login system, and access the Twitter API.
  • The Snapchat SDK, called Snap Kit, allows apps to integrate with Snapchat features like filters, stickers, links, and more.

SDKs streamline the development process by providing a higher-level abstraction over the raw APIs. They handle much of the low-level work and allow developers to use the social platform‘s features with less code.

Key Differences Between APIs and SDKs

While APIs and SDKs are related, they serve different core purposes. Here are some of the key differences:

  1. Purpose
  • APIs are about enabling communication between different applications and systems.
  • SDKs are about providing the tools and resources to build applications for a specific platform.
  1. Scope
  • APIs define the rules and protocols for how different software components should interact.
  • SDKs provide the actual building blocks (code libraries, tools, documentation) used to construct applications.
  1. Flexibility
  • APIs tend to be more flexible and dynamic, allowing developers to access specific data and features in novel ways.
  • SDKs are more structured and static, giving developers a prescribed way to achieve common tasks on a platform.
  1. Completeness
  • An SDK is usually a more complete and "packaged" solution for developing on a platform, while an API is just one piece of the puzzle.
  • SDKs often include APIs as well as other components like libraries, developer tools, and code samples.

How APIs and SDKs Work Together

In practice, APIs and SDKs are often used in tandem. A social media company will provide an SDK to help developers easily build apps for their platform, and that SDK will include convenient ways to use the company‘s APIs.

For instance, the Facebook SDK provides libraries that abstract away the low-level details of making API requests. So instead of having to construct the HTTP requests to the Facebook API directly, developers can use the higher-level functions provided by the SDK, which in turn makes the appropriate API calls.

This combination of an easy-to-use SDK and a powerful API has been key to the success of the social media platforms. It allows them to maintain control and consistency (through the SDK) while still enabling innovative uses of their data and features (through the API).

The Future of Social Media APIs and SDKs

As social media continues to evolve, so too will the APIs and SDKs that power it. Some of the key trends we can expect to see:

  1. More open and interoperable APIs
    As users increasingly demand control over their data and the ability to interact across platforms, social networks are under pressure to provide more open and flexible APIs. This could lead to a future where data can flow more freely between different social apps.

  2. Cross-platform and modular SDKs
    With the proliferation of devices and platforms, developers are looking for SDKs that allow them to write code once and deploy it across multiple environments. We can expect to see more modular, cross-platform SDKs that give developers this flexibility.

  3. Greater focus on privacy and security
    With high-profile data breaches and privacy scandals, there is increasing scrutiny on how social media APIs handle user data. Future APIs will likely have more granular permissions, stricter access controls, and better tools for users to manage their data sharing.

  4. Integration with emerging technologies
    As new technologies like virtual reality, augmented reality, and blockchain gain traction, social media APIs and SDKs will evolve to integrate with these platforms. This could enable new types of social experiences and interactions.

Challenges and Risks

While APIs and SDKs have undeniably accelerated innovation in social networking, they also come with their share of challenges and risks:

  1. Security and Privacy
    APIs can be a vector for data breaches if not properly secured. Malicious actors may try to exploit API vulnerabilities to gain unauthorized access to user data. And even legitimate uses of APIs can sometimes lead to unintended data exposure.

  2. Platform Dependency
    Building an app on top of a social media SDK means tying your fortunes to that platform to some degree. If the platform changes its SDK or API in a breaking way, or if it decides to restrict certain uses, it can have a major impact on dependent apps.

  3. Balancing Openness and Control
    For the social media companies, APIs and SDKs represent a balancing act between openness and control. Too much openness can lead to abuse and fragmentation, while too much control can stifle innovation and limit the growth of the ecosystem.


From the early days of email and message boards to the current landscape of mobile apps and immersive experiences, social networking has come a long way. And much of this evolution has been made possible by the APIs and SDKs that allow different applications and services to connect and build on each other.

While often mentioned in the same breath, APIs and SDKs serve distinct but complementary purposes. APIs are the communication channels that let data and functionality flow between applications, while SDKs are the toolkits that help developers build applications that tie into that data and functionality.

As social networking continues to shape our digital lives, understanding the role and evolution of these technological building blocks is key. The APIs and SDKs of today will lay the groundwork for the social experiences of tomorrow, with all the promise and challenges that entails. As developers and users of these technologies, it‘s up to us to shape that future thoughtfully and responsibly.