What Is an (API) Application Programming Interface in Transportation

In today's fast-paced logistics environment, seamless data exchange between systems is critical for operational efficiency. When your software applications can't communicate effectively, you face delays, manual workarounds, and costly errors. Application Programming Interface (API) technology solves this challenge by enabling real-time communication between different transportation management systems. In this blog post, you'll explore what APIs are, how they're used in transportation, and their key advantages and disadvantages.

What is API?

Josh Walker, an analyst at Forrester Research, describes building an application with no APIs as "basically like building a house with no doors. The API for all computing purposes is how you open the blinds and the doors and exchange information."

An API in its simplest form is simply a bit of code that allows for two software programs to communicate with each other. APIs act as a sort of set of standards that either permits or denies outside software to request information from the main program.

Not Utilizing API:

An app finds a Delta flight status by going to the Delta Airlines website, searching for the flight number, and interpreting the status of the flight search much like a human would. Without utilizing the capabilities of an API, the app finds the information it is looking for by manually going through all the same steps you would have to go through in order to find the same information.

Utilizing API:

An app finds the Delta flight status by simply sending a message in a standard format (API) to delta.com and the API on the Delta website then returns the status of that flight directly to the app.

Common Uses of API

API use has increased over the last ten years.

In fact, many of today's most commonly used web applications would not even be possible without the use of some form of API.

For example, every time you share something on social media, an application programming interface is involved. Any time an application allows you to sign in with your Facebook or Google credentials, an API is what syncs that information. Likewise, any application that allows you to import contacts or friends from social media is using API to do so.

Some of the most popular APIs currently being used are:

  • Google Maps - embeds Google Maps into applications
  • Google Analytics – allows applications to access Google Analytics data and reporting
  • Youtube API - embeds YouTube players or enables YouTube search capabilities
  • Social Media - allows native or third-party apps to interact with the social media platform's functions
  • Weather Channel - allows weather from The Weather Channel to populate within an application
  • Dropbox – allows for an app to sync Dropbox files across platforms securely
  • WordPress – enables WordPress to communicate with other web properties regardless of programming language

API use in Transportation

This technology has also found increased usage within the transportation industry, bridging the information gap between shippers, carriers, brokers, and software systems. When you need to retrieve shipment data from multiple carriers, how do you ensure fast, reliable communication between systems?

APIs have several uses within the industry, helping streamline freight workflows. Some of the most prevalent include:

  • Rating – sends quote request to multiple carriers and returns pricing results to requesting application
  • Transit Times – retrieves standard transit times from multiple carriers
  • Dispatch – sends carrier pick-up request and responds with pick-up confirmations
  • Tracking – allows for track and trace information on shipments
  • Document Retrieval – allows for developers to request shipping documents utilizing a carrier's tracking number
  • Expedited Transit Time – allows for developers to get expedited transit times

See how companies have leveraged API technology in their logistics operations in our case studies.

Advantages

API offers several advantages with the main one being speed. Requests and responses are exchanged within seconds as opposed to minutes, or in some instances even hours. Other advantages include:

  • Internet-based connectivity
  • Communication is two-way with confirmations included within the transaction sets
  • Since communication is two-way APIs offer reliable transaction sets
  • The end product offers user-friendly experiences improving internal and external user satisfaction
  • Provides evolving functionality as developers find new uses for API exchanges

Disadvantages

The disadvantages of application programming interfaces include:

  • Implementing and providing API capabilities can be costly in terms of development times, ongoing maintenance requirements, and providing support.
  • Scaling API requires extensive programming knowledge and the learning curve can fairly steep when understanding how to extend the capabilities of your API framework.
  • Security can be a concern as APIs add another potential attack layer to programs/websites.

Final Thoughts

APIs have become essential for modern logistics operations, enabling real-time data exchange that improves efficiency and customer satisfaction. While implementation requires investment, the speed and reliability benefits often outweigh the costs for your transportation operations. If you missed it, check out last week's article on EDI, because in part three of this series, you'll learn about the differences between EDI and API.

FAQs

What is an application programming interface in supply chain logistics?

An application programming interface, or API, is code that allows two software programs to communicate using a standard format. In supply chain logistics, that means systems can exchange shipment, rating, tracking, and document data directly instead of relying on manual lookups or workarounds. The result is faster communication between shippers, carriers, brokers, and transportation software.

How do APIs improve transportation management systems?

APIs improve transportation management systems by moving data between platforms in real time. Instead of waiting for manual updates, a system can send a request and receive a response within seconds. That speed helps with quote requests, transit time checks, pickup confirmations, tracking visibility, and document retrieval across multiple carriers.

What are the most common uses of APIs in transportation?

The most common uses of APIs in transportation are rating, transit time lookup, dispatch, tracking, document retrieval, and expedited transit time requests. For example, an API can send a quote request to multiple carriers, return pricing, confirm a pickup, or pull shipment documents using a tracking number. These functions reduce manual steps and speed up workflows.

What is the difference between using an API and not using one?

Without an API, software often has to mimic a person by visiting a website, searching for information, and interpreting the result manually. With an API, the software sends a standard request and receives the needed data directly. That direct exchange is faster, more reliable, and better suited to high-volume logistics operations.

Why are APIs important for logistics operations?

APIs are important because logistics depends on fast, reliable data exchange. When systems can communicate directly, teams spend less time on manual entry and less time fixing errors caused by disconnected software. That improves efficiency, supports better user experiences, and helps operations keep pace with time-sensitive shipping activity.

What are the main advantages of application programming interfaces?

The main advantages of application programming interfaces are speed, two-way communication, reliable transaction sets, internet-based connectivity, and better user experiences. Requests and responses can happen within seconds, which is much faster than manual processing. APIs also keep evolving as developers find new ways to connect systems and automate workflows.

What are the drawbacks of implementing an API?

The main drawbacks of implementing an API are development cost, ongoing maintenance, the need for strong programming knowledge, and added security exposure. Building and supporting API capabilities takes time and resources, and scaling them can be technically complex. Because APIs add another access layer, security planning also matters.