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The Challenges of Building and Maintaining Custom API Integrations

Writer's picture: Dr. Themo Voswinckel ⎪Co-Founder Dr. Themo Voswinckel ⎪Co-Founder

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Building custom API integrations might seem like a straightforward task, but it often reveals unexpected challenges. Whether you're dealing with complex field mapping between different systems or the need for custom-built data transformations, the process can quickly become more complicated than initially anticipated. Add to that the ongoing maintenance required to keep these integrations running smoothly, and you've got a real test of your development team's patience and skills. This blog will walk you through some of the common difficulties you might encounter when creating custom API integrations, along with potential solutions to help you navigate these challenges effectively.

The Complexities of Field Mapping Between Systems

One of the first hurdles you'll likely encounter when building custom API integrations is field mapping between systems. On the surface, mapping standard data types—like linking an “Account” in your CRM to a “Customer” in your ERP system—might seem simple. But when you start dealing with specialized fields, things can get a lot trickier.

For example, consider a scenario where your customer success tool includes a custom “Customer Health Score” field that you want to map to your CRM. Unfortunately, this field doesn’t exist in your CRM, which means you’ll have to create it first before mapping can happen. This process isn't just about creating fields; it's also about ensuring that the data makes sense in its new context and that it's usable for your team. And that’s where the challenge lies—how do you ensure that this new field is compatible with your CRM's existing data structures?


This problem is further compounded when dealing with multiple systems that each have their own unique data structures. What works well in one system might not translate smoothly into another, requiring you to either modify existing fields or create entirely new ones. It's a time-consuming process that requires a deep understanding of each system's architecture.


Custom-Built Data Transformations: A Necessary Evil

Now, let’s talk about data transformations. Your developers might have already set up transformation logic for standard objects and fields. But what happens when you introduce custom objects or fields into the mix? Suddenly, you need new transformation logic, and that’s where things get complicated.


Creating custom data transformations is not just about coding. It requires a deep understanding of the data itself, the business processes behind it, and how it will be used once it’s transformed. For instance, if you’re integrating a new field like “Customer Health Score,” you’ll need to determine how this score is calculated, how it impacts other data points, and how to ensure that this information is accurately transformed across all systems.

This process can be time-consuming and resource-intensive, particularly when multiple custom integrations are involved. Each integration might require its own unique set of transformation rules, and ensuring that these rules work correctly across all systems is no small feat. It’s a classic case of “easier said than done,” and it’s one of the main reasons why custom API integrations can become such a headache.


Increased Integration Maintenance: The Ongoing Challenge

Once your custom API integrations are up and running, the work is far from over. In fact, this is where the real challenges begin. Custom integrations often introduce new errors that didn’t exist before, such as incorrect data due to flawed transformation logic. To address these issues, developers must create additional error-handling processes and continually monitor the integrations to ensure they’re functioning correctly.


But it doesn’t stop there. As your business processes evolve, so too must your integrations. This means regularly updating your integrations to reflect changes in your data structures, business logic, or external systems. It’s a continuous cycle of proactive and reactive work that can quickly become a significant burden on your development team.

The need for ongoing maintenance is one of the most underestimated challenges of custom API integrations. It’s not just about building the integration; it’s about keeping it running smoothly over time. And as your business grows and evolves, so too will the complexity of your integrations, requiring even more time and resources to manage.


How to Build Custom API Integrations: In-House vs. 3rd-Party Solutions

When it comes to building custom API integrations, you generally have two options: building them in-house or using a third-party integration solution. Both approaches have their pros and cons, and the right choice will depend on your specific needs and resources.

Building integrations in-house gives you complete control over the process, allowing you to tailor the integration to your exact requirements. However, it also requires a significant investment in time and resources, as well as a deep understanding of the systems you’re integrating.


On the other hand, third-party solutions can simplify the process by providing pre-built connectors and integration tools. These solutions often come with built-in error handling and maintenance features, which can save you a lot of headaches in the long run. However, they may not offer the same level of customization as an in-house solution, and you may have to compromise on certain features or functionality.

Regardless of the approach you choose, it’s important to understand that no two custom integrations are alike. Each one is unique, with its own set of challenges and requirements. Whether you’re dealing with varying APIs from different providers, rate limits, pagination methods, or authentication techniques, you’ll need to carefully consider all these factors when building your custom API integrations.


Unified API Solutions: A Better Way?

For customer-facing integrations, a unified API solution can be a game-changer. Unified APIs normalize data models from third-party APIs to a standard schema, making data interaction much easier. This approach can simplify the integration process by standardizing rate limits, pagination, and authentication methods across all your integrations.

One of the key benefits of a unified API solution is that it can significantly reduce the complexity of building and maintaining custom integrations. By providing a consistent data model and API interface, unified APIs can help you avoid many of the common pitfalls associated with custom integrations. This can save you time and resources, allowing you to focus on more strategic initiatives.


Using Maesn for Custom Integrations

If you’re looking for a unified API solution, Maesn is a leading option worth considering. Maesn’s Field Mapping feature allows you to add custom objects and fields to its Common Models, enabling you to easily create highly-customized, customer-facing API integrations.

For example, you could use Maesn’s Field Mapping to add a “custom score” field from a client’s Applicant Tracking System (ATS) to Maesn’s Candidate Common Model. This would allow you to synchronize this custom data with your product, making it easier to manage and analyze.

By using a solution like Maesn, you can simplify the process of building and maintaining custom API integrations, reducing the amount of time and effort required to keep your integrations running smoothly.


FAQs About Custom API Integrations

What is needed for custom API integrations? At a basic level, you need to know the endpoints corresponding to the objects and fields you want to connect. From there, you can either use a tool or rely on in-house developers to build and maintain these connections. Given the unique requirements of each custom API integration, sometimes leveraging in-house developers is best, while other times a specific third-party solution may be more suitable.

What are the benefits of custom API integrations? Custom API integrations offer several benefits, including time savings, improved employee satisfaction, happier customers, and fewer human errors for internal integrations. For customer-facing integrations, benefits include higher customer retention, an improved close rate, and easier market expansion.

What is the difference between an API and a custom API? Standard API endpoints provide the same data and functionality to all consumers, while custom API endpoints are tailored to specific clients or subsets of clients. Most organizations use standard API endpoints.

What is the difference between a custom integration and a custom API integration? The main difference lies in the connectivity method used. Custom API integrations rely solely on API endpoints, whereas custom integrations can also use files, screen scraping, and other methods.

What are the different types of custom API integrations? There are numerous types of custom API integrations for different teams, applications, and data. These integrations can be internal (within your organization’s applications) or customer-facing (between your product and your customers’ applications), adding to the variety of API integrations that can be built.


Wrapping Up

Building and maintaining custom API integrations is no walk in the park. From the complexities of field mapping to the ongoing maintenance required to keep things running smoothly, there’s a lot that can go wrong. However, by understanding the challenges and taking a strategic approach—whether by building in-house or leveraging third-party solutions like Maesn—you can navigate these difficulties and create integrations that truly add value to your business.

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