Patrick Allen Putman has worked in DevOps, cloud infrastructure, platform engineering, and cybersecurity for over a decade. His experience designing and securing cloud-native systems has given him a unique perspective on the growing role APIs play in both innovation and cybersecurity. In the following article, he discusses why API security has become one of the most important and often underestimated components of SaaS platforms.
Modern software looks very different than it did just a decade ago. Rather than relying on a single application running in isolation, today’s Software-as-a-Service platforms are built on countless connections between cloud services, mobile apps, third-party integrations, payment processors, identity providers, and internal microservices. At the center of nearly every one of those connections is an application programming interface.
APIs allow these systems to exchange information, automate processes, and deliver the seamless experiences users now expect. Whether someone is logging into an account, completing an online purchase, syncing data between applications, or accessing cloud-based services, these interfaces are quietly working behind the scenes to make those interactions possible. As organizations continue to expand their digital ecosystems, securing these connections has become just as important as protecting the applications themselves.
Patrick A. Putman Explains that APIs Power Nearly Everything
Most users never think about APIs because they operate quietly in the background.
When someone logs into a banking application using facial recognition, a programming interface validates their identity. When an online retailer checks inventory before processing an order, it communicates between inventory systems, payment processors, shipping providers, and customer databases. Healthcare portals, streaming services, travel booking platforms, collaboration tools, and financial applications all depend on APIs exchanging information continuously.
Modern SaaS simply could not function without them.
As organizations continue adopting cloud-native architectures, APIs have become the digital highways connecting nearly every business process. Every new integration creates opportunities for greater efficiency, automation, and innovation. At the same time, every interface also becomes another potential pathway that attackers may attempt to exploit.
The Growing Attack Surface
Patrick Allen Putman explains that organizations often devote considerable attention to protecting websites, cloud infrastructure, and employee devices while overlooking the APIs connecting those systems together. This isn’t because businesses ignore security. Rather, integration points have expanded so rapidly that security strategies have struggled to evolve alongside them. In fact, the 2025 State of API Security Report found that 58% of organizations monitor their APIs less than daily and lack confidence in the accuracy of their API inventories, leaving many businesses with significant visibility gaps.
Large SaaS platforms may operate hundreds or even thousands of APIs supporting different business functions. Some are designed for customers. Others connect internal applications, while many enable third-party integrations that improve functionality.
Each one introduces additional endpoints, authentication requirements, permissions, and data exchanges.
Without proper oversight, organizations may lose visibility into exactly how many communication channels they operate, who has access to them, or what sensitive information they expose.
APIs Often Handle an Organization’s Most Valuable Data
Cybercriminals follow valuable information. Rather than attacking every system equally, they frequently focus on the areas containing customer records, financial information, authentication credentials, healthcare data, or intellectual property.
Patrick A. Putman reports that these interfaces often communicate with databases, identity systems, payment platforms, and cloud storage simultaneously. If an attacker successfully compromises one vulnerable API, the resulting access may extend far beyond a single application.
Unlike visible website defacements, attacks can sometimes remain unnoticed because they resemble legitimate traffic. Requests may appear normal while quietly extracting sensitive information over extended periods.
That makes monitoring API behavior just as important as protecting the infrastructure supporting it.
Authentication Is Only the Beginning
Many organizations assume authentication alone solves API security, but strong authentication certainly matters. Multi-factor authentication, OAuth implementations, secure tokens, and modern identity providers all strengthen protection.
However, authentication answers only one question: Who is making the request?
Equally important questions include:
- Can that user access this information?
- Should this application perform this action?
- How frequently should requests be allowed?
- Is this behavior consistent with normal activity?
Authorization mistakes remain one of the most common API security weaknesses, according to Patrick Putman of Alabama. Users may successfully authenticate but still gain access to information or functions beyond what their role should permit.
Carefully defining permissions and continuously validating them is just as important as verifying identity.
Interface Discovery Has Become a Security Priority
One of the biggest challenges facing security teams is simply knowing what exists.
Development teams regularly build new services, retire older systems, test experimental features, and integrate third-party platforms. During periods of rapid growth, undocumented or forgotten APIs sometimes remain accessible long after their intended purpose has ended.
These so-called “shadow APIs” represent unnecessary risk.
Organizations often benefit from continuously discovering, cataloging, and monitoring every API operating within their environment.
Visibility provides the foundation for effective security.
Businesses cannot secure systems they do not know they have.
Rate Limiting Helps Prevent Abuse
Not every attack attempts to steal information immediately, some attackers overwhelm services by submitting enormous numbers of requests in a short period of time. Others systematically guess account credentials or automate fraudulent transactions.
Rate limiting helps reduce these risks by controlling how frequently users or applications can access specific endpoints. In fact, well-designed rate limiting protects system availability while reducing opportunities for abuse.
Combined with behavioral analytics, it also helps security teams distinguish legitimate customer activity from automated attacks.
Encryption Protects Data in Motion
APIs constantly exchange sensitive information.
- Customer records.
- Payment details.
- Authentication tokens.
- Healthcare information.
- Business documents.
Every transmission represents valuable data that should remain protected while traveling across networks.
Patrick A. Putman emphasizes that strong encryption remains one of the simplest yet most effective safeguards available. Encrypting API communications using modern standards helps reduce opportunities for interception while protecting customer information throughout its journey.
Encryption should never be viewed as optional – instead, it serves as a fundamental expectation for modern SaaS platforms.
APIs Require Continuous Monitoring
Security does not end once an API is deployed; new vulnerabilities emerge, applications evolve, customer behavior changes and threat actors continually develop new attack techniques. Continuous monitoring allows organizations to recognize unusual activity before it develops into a larger incident.
Patrick Putman of Alabama explains that artificial intelligence and behavioral analytics increasingly help security teams identify abnormal API activity that traditional rule-based systems might overlook.
Examples include unexpected request volumes, unusual geographic access patterns, abnormal data downloads, or applications suddenly communicating with unfamiliar services.
Detecting these anomalies early gives organizations valuable time to investigate and respond before significant damage occurs.
Secure Development Starts Early
Effective API security begins long before software reaches production.
Security reviews conducted only after deployment often identify problems that become expensive and disruptive to fix. Instead, organizations increasingly embrace secure development practices throughout the software development lifecycle.
- Developers validate input.
- Engineers implement secure authentication.
- Security teams perform code reviews.
- Automated testing identifies vulnerabilities before deployment.
- Infrastructure teams continuously verify configurations.
Patrick Allen Putman believes that integrating security into development workflows allows organizations to innovate more confidently while reducing unnecessary risk. This DevSecOps mindset helps transform security from a final checkpoint into an ongoing engineering discipline.
Third-Party Integrations Deserve Equal Attention
One of SaaS’s greatest strengths is its ability to connect with other platforms.
- CRM systems integrate with marketing software.
- Accounting applications communicate with banking platforms.
- Customer support tools connect with analytics platforms.
- Identity providers authenticate users across multiple applications.
These integrations improve efficiency but also expand an organization’s security responsibilities.
Every third-party connection represents another relationship built on trust. Organizations should evaluate vendors carefully, understand how shared data is protected, and regularly review the permissions granted through API integrations.
Supply chain security increasingly depends on understanding not only your own APIs but also those operated by trusted partners.
API Security Is Becoming a Competitive Advantage
Customers today expect secure software. Enterprise buyers routinely evaluate security practices before selecting SaaS providers.
Security questionnaires, penetration testing, compliance audits, and vendor risk assessments have become standard parts of procurement.
Organizations demonstrating mature API security practices often strengthen customer confidence while reducing operational risk.
Patrick Putman of Alabama explains that security should not be viewed solely as a compliance obligation. It also serves as a differentiator that helps organizations build trust, protect their reputation, and support long-term business growth.
As digital ecosystems become increasingly interconnected, confidence in secure APIs becomes confidence in the business itself.
Building Resilient SaaS Starts With Secure APIs
The future of SaaS will continue moving toward greater connectivity.
Artificial intelligence, machine learning, automation, Internet of Things devices, edge computing, and cloud-native architectures all depend on APIs exchanging information quickly and reliably.
This growing interconnectedness makes API security more important than ever before.
Organizations achieve the strongest security when API protection becomes part of every stage of software development rather than an afterthought. Authentication, authorization, encryption, continuous monitoring, secure coding practices, and careful governance all contribute to reducing risk while supporting innovation.
Ultimately, Patrick A. Putman emphasizes that APIs are far more than technical interfaces. They have become the foundation upon which modern SaaS platforms operate. Organizations that invest in securing those connections are not only protecting sensitive information, they are strengthening customer trust, improving operational resilience, and creating the secure digital infrastructure required to support the next generation of cloud applications.
