Blog

Field notes on application security.

How-tos, research, and lessons on securing APIs, AI, and the modern application surface.

API Security

NoSQL Injection in APIs: Detection and Prevention

How to detect and prevent NoSQL injection in APIs with MongoDB examples, operator payloads, and secure code fixes.

March 25, 20266 min

API Testing

SQL Injection in APIs: Testing, Exploitation, and Prevention

How to test and prevent SQL injection in APIs with code examples, WAF bypass techniques, and proven defense strategies.

March 24, 20266 min

API Security

SQL Injection Cheat Sheet for API Security Testing

SQL injection targets APIs through JSON bodies, query params, and headers. Get API-specific payloads, code fixes, and a testing checklist.

March 23, 20266 min

API Security

HTTP Request Smuggling in API Gateways

HTTP request smuggling lets attackers bypass API gateway security controls. See API-specific attack types, real CVEs, payloads, and prevention strategies.

March 9, 20266 min

API Security

API Access Control Vulnerabilities: Complete Testing Guide

Broken access control is the #1 API risk. See API-specific examples of BOLA and BFLA, testing methods, real breaches, and proven prevention strategies.

March 9, 20266 min

API Security

Insecure Deserialization in APIs: Complete Guide

Insecure deserialization lets attackers execute code through API endpoints. See how deserialization attacks work, real CVEs, and proven prevention strategies.

March 9, 20266 min

API Security

Race Condition Vulnerabilities in APIs

Race condition vulnerabilities let attackers exploit timing gaps in API logic. See real attack patterns, code examples, and proven prevention strategies.

March 4, 20266 min

API Security

Path Traversal in APIs: Detection and Prevention

Path traversal attacks let hackers read sensitive server files through API endpoints. See API-specific examples, payloads, and prevention strategies.

March 5, 20266 min

API Security

Top API Discovery Tools

Compare top API discovery tools that find shadow APIs, zombie endpoints, and hidden vulnerabilities across your environment.

February 9, 20266 min

API Security

Manual Penetration Testing vs Automated API Security

Manual pentesting vs automated API security: compare which approach protects modern APIs. Analyze speed, coverage, and cost to secure your endpoints effectively.

February 9, 20266 min

API Security

Difference Between API Security and Web Security

Compare API security and web security. Critical differences, unified protection strategies, and why modern apps need both for complete defense.

February 10, 20266 min

API Security

What Is API Discovery and Inventory?

What API discovery and inventory are, why they matter for security, and how to implement automated solutions to protect your complete API attack surface.

February 7, 20266 min

API Security

API Sprawl Management Strategies

What API sprawl is, why 48% of organizations call it their top challenge, and proven strategies to manage, secure, and optimize your growing API ecosystem.

February 5, 20266 min

API Security

Zombie API Detection and Removal

How to detect zombie APIs through automated discovery and remove deprecated endpoints safely without breaking integrations.

February 3, 20266 min

API Security

How to Automate API Discovery with Extensions

Automate API discovery using browser extensions and scanning tools. Build real-time inventories and secure shadow APIs.

January 13, 20266 min

API Testing

What Is an API Call?

API calls let applications exchange data and trigger actions. Learn how requests work, HTTP methods, authentication, security risks, and best practices.

January 13, 20266 min

API Testing

Build Your API Inventory Automatically as You Browse

Manual API tracking fails. Automatic discovery builds complete inventories in real time, eliminating shadow APIs and security blind spots.

January 12, 20266 min

API Security

OAuth 2.0 Common Security Flaws and Prevention Techniques

Prevent OAuth vulnerabilities, including redirect URI attacks, PKCE bypasses, and token theft with proven security techniques.

December 24, 20256 min

API Security

API Rate Limiting Strategies: Preventing DDoS and Resource Exhaustion

Protect APIs from DDoS and resource exhaustion with rate limiting strategies, including token bucket and sliding window algorithms.

December 24, 20256 min

API Security

Open Source vs Commercial API Security Scanners Compared

Compare open source and commercial API security scanners. Choose the right tool based on features, automation, and business logic testing.

December 24, 20256 min

API Security

Financial Services API Security Compliance Guide

Master PCI DSS, PSD2, and fintech API security compliance with practical controls, testing strategies, and regulatory requirements.

December 23, 20256 min

API Security

API Security Automation Tools and Techniques for DevOps Teams

Integrate automated API security testing into CI/CD pipelines with tools and techniques that catch vulnerabilities before deployment.

December 23, 20256 min

API Security

How to Implement Automated API Security Testing in Development Workflows

Step-by-step guide to implement automated API security testing in CI/CD pipelines. Integrate security testing into development workflows effectively.

December 12, 20256 min

API Security

API Security Testing for Payment Systems: PSD2 and Open Banking Requirements

Test payment gateway APIs for PSD2 compliance and Open Banking security. Complete checklist for authentication and transaction verification.

December 9, 20256 min

API Security

JWT Security Vulnerabilities: Prevention Guide & Best Practices

Identify and fix JWT vulnerabilities: algorithm confusion, weak secrets, and missing validation, practical hardening techniques with examples.

December 9, 20256 min

API Security

API Abuse Detection: Distinguishing Between Bots

Distinguish malicious bots from legitimate automation on your APIs. Learn behavioral signals that separate good bots from bad bots attacking your endpoints.

December 9, 20256 min

API Security

Securing Webhook Endpoints: Authentication and Validation Best Practices

Secure webhooks with HMAC, OAuth & payload validation. Step-by-step guide with testing checklist and common vulnerabilities.

December 1, 20256 min

API Security

API Security in Microservices Architecture: Best Practices

Secure microservices APIs with mTLS authentication, zero trust authorization, service mesh, and secret management to stop lateral movement.

December 1, 20256 min

API Security

GraphQL Security Testing: Complete Guide for Developers

Complete GraphQL security testing guide. Learn common vulnerabilities, penetration testing methods, and best practices for securing GraphQL APIs.

December 1, 20256 min

API Security

REST API Security Best Practices Every Developer Should Know

Secure your REST APIs with 6 proven practices: strong authentication, authorisation, HTTPS encryption, input validation, rate limiting, and token management.

December 1, 20256 min

API Security

Complete API Penetration Testing Checklist for Security Teams

Complete API pentesting checklist covering BOLA, broken authentication, BFLA, and more vulnerabilities. Get testing steps, tools, and real examples.

December 1, 20256 min

API Security

SSRF Explained: OWASP API Security Principle 7 Made Simple

Access control issues remain common in APIs. Continuous validation is essential as code and features evolve, making automated testing critical for long-term security.

November 19, 20256 min

API Security

Unrestricted Business Flows: OWASP Principle 6 Explained

APIs are often under-secured and over-permissioned. Hackers and regulators alike now highlight the growing risk of exposed APIs.

November 19, 20256 min

API Security

Instagram API Breach 2026: 17.5M Accounts & the Unrestricted Access Flaw

In Jan 2026, a 17.5M-user Instagram API breach exposed what happens when business flows go unchecked. Discover the flaw and how to prevent it.

November 19, 20256 min

API Security

BFLA Explained: Securing API Functions from Abuse

APIsec automates API discovery, OWASP testing, logic validation, AI-generated attacks, and CI/CD integration for modern engineering workflows.

November 19, 20256 min

API Security

BOPLA (Broken Object Property Level Authorization): OWASP API3 Explained

BOPLA is OWASP API Security API3:2023. Learn how broken object property level authorization exposes sensitive data through API endpoints.

November 19, 20256 min

API Security

Preventing Resource Abuse: Protect APIs from Harvesting

Unrestricted resource consumption makes APIs vulnerable to data harvesting and slowdowns. Learn to prevent DoS and control usage with rate limits and validation

November 19, 20256 min

API Security

Inside the Peloton Breach: Broken Authentication Lessons

Peloton’s API breach exposed user data due to broken authentication and poor authorization controls. Learn key lessons from this high-profile security failure

November 19, 20256 min

API Security

Understanding Security Misconfiguration in APIs: OWASP 8 Explained

Learn how Security Misconfiguration (OWASP 8) exposes APIs to risk. See real-world examples, prevention tips, and how APIsec.ai automates API hardening.

November 19, 20256 min

API Security

Improper Inventory Management in APIs OWASP API9 Explained & How to Fix It

OWASP API9:2023 – Improper Inventory Management leaves undocumented APIs exposed. Learn what causes it, real-world risks, and how to audit your full API inventory.

November 19, 20256 min

API Security

Unsafe API Consumption: Securing Third-Party Integrations

Understand OWASP 10 – Unsafe Consumption of APIs. Learn how third-party API risks lead to data breaches and how APIsec.ai helps validate and secure external integrations.

November 19, 20256 min

API Security

Broken Authentication Explained: OWASP API Principle 2

Discover why broken authentication ranks in the OWASP API Top 10. See how attackers exploit APIs with insecure login, token, and session management flaws

November 19, 20256 min

API Testing

Are Free API Scanners Actually Worth It?

Free API testing tools promise convenience, but do they truly secure APIs? Compare free API scanners vs. automated APIsec testing in this practical guide.

November 19, 20256 min

API Testing

How to Choose the Right API Pen-Testing Tool

Greenslate secured 2,300+ undocumented endpoints with APIsec, integrating continuous testing to protect financial data despite limited resources.

November 19, 20256 min

API Testing

Real-World Lessons of Broken Object Level Authorization (BOLA)

Uncover real-world lessons from BOLA attacks and learn how to protect your APIs from unauthorized data access

November 19, 20256 min

API Security

BOLA Explained: OWASP API Security Principle 1 for Teams

Broken Object Level Authorization (BOLA) is OWASP API Security API1:2023 — the #1 API risk. Learn how BOLA works, real-world examples, and how to prevent it.

November 19, 20256 min

API Security

Real-World API Security Breaches: Lessons from Major Attacks

Learn from major API security breaches and how to safeguard your applications against evolving cyber threats

November 19, 20256 min

API Security

AppSec Tech Landscape: Strengths, Gaps & What Teams Need

Understand the evolving application security technology landscape—see where security tools excel and where critical gaps persist to protect APIs

November 19, 20256 min

API Security

The Three Pillars of Modern API Security

Explore the three pillars of API security—governance, testing, and continuous validation—to safeguard your applications with proven protection strategies.

November 19, 20256 min

API Security

API Security Fundamentals: Core Principles for Modern Apps

Learn API security fundamentals and discover how to protect modern applications from vulnerabilities, breaches, and evolving cyber threats with ApiSec.ai.

November 19, 20256 min

API Testing

API Failure: 7 Causes and How to Fix Them

Understand what causes API failures, what common error codes mean, and how to fix and prevent them with automated testing and monitoring from APIsec.

November 17, 20256 min

API Testing

Which API Security Testing Tool Should I Choose

Compare the best API security testing tools for. See how APIsec leads with automated business logic testing, CI/CD integration, and continuous protection.

November 17, 20256 min

API Testing

CI/CD API Security: A Complete Automation Guide

Automate API security testing in CI/CD pipelines with practical steps, tool comparisons, and workflow integrations for continuous protection.

November 17, 20256 min

API Testing

API Security Mistakes That Lead to Data Breaches

Stop API security mistakes before they cause breaches. Learn the seven critical flaws hackers exploit and how automated testing protects your APIs from attacks.

November 17, 20256 min

API Testing

How to Detect Business Logic Vulnerabilities in API

Learn proven methods to detect API business logic vulnerabilities that scanners miss. Explore manual and automated logic testing approaches for secure, enterprise-scale APIs.

November 14, 20256 min

API Testing

Why Do APIs Keep Getting Hacked

APIsec enhanced Slimstock’s API security with continuous testing, rapid value delivery, and significant savings across inventory systems.

November 14, 20256 min

API Testing

When Do You Need API Penetration Testing for Your Applications

APIsec boosts EstateSpace’s API security with full coverage and real-time risk insights, delivering fast deployment, lower costs, and stronger protection.

November 14, 20256 min

API Testing

API Vulnerability Scanning vs Penetration Testing: Key Differences

APIsec strengthened Axos Bank’s API testing with continuous coverage, fast deployment, and reduced costs while protecting sensitive financial data.

November 14, 20256 min

API Testing

Why Automated API Testing Tools Are Better Than Manual Testing

Learn proven API authentication and authorization methods—OAuth2, JWT, MFA—and implementation best practices to prevent data breaches.

November 14, 20256 min

API Testing

Can Automated API Security Testing Replace Security Code Reviews

Find real API vulnerabilities in minutes with APIsec’s automated, AI-driven scans—spot logic flaws, data leaks, and OWASP issues instantly.

November 14, 20256 min

API Testing

How Does Automated API Endpoint Testing Improve Security Coverage

A deep dive into API privacy: why it matters, the frameworks shaping it, and how teams can strengthen privacy across modern API ecosystems.

November 14, 20256 min

API Testing

API Fuzzing for Security Testing: Complete Guide

API fuzzing automates vulnerability discovery beyond what manual testing can find. Learn security testing workflows, top tools, and CI/CD integration strategies.

October 22, 20256 min

API Security

API Auth Best Practices: Strong Authentication & Authorization

APIsec uncovers vulnerabilities before production and integrates seamlessly into CI/CD for streamlined, secure development workflows.

October 21, 20256 min

API Security

Fixing Broken API Authentication: Detection & Prevention

Fix broken API authentication vulnerabilities before attackers exploit them. Learn detection methods, prevention strategies, and automated testing solutions for secure APIs.

October 21, 20256 min

API Security

API Endpoint Guide: Architecture, Security & Best Practices

A guide to choosing API pen testing tools: key benefits, challenges, must-have features, and how strong tooling prevents API vulnerabilities.

October 21, 20256 min

API Testing

Difference Between SAST and DAST: Key Insights & Tools

Understand the difference between SAST and DAST, their importance, and the best tools for application security testing.

October 21, 20256 min

API Testing

Troubleshooting Guide for API Failure: Common Causes & Solutions

Fix API failures with effective solutions. Understand causes and learn how to troubleshoot common API issues quickly and efficiently.

October 21, 20256 min

API Security

API Security Orchestration: Automating Response & Remediation

Automate incident response with API security orchestration to enhance security operations and streamline threat detection and remediation.

October 21, 20256 min

API Security

Prompt Injection and LLM API Security Risks | Protect Your AI

Address prompt injection and API security risks in AI. Implement effective strategies to safeguard your systems against emerging threats.

October 17, 20246 min

API Security

Secure Your Shadow APIs: Best Practices for API Discovery

Learn effective strategies for shadow API discovery and securing undocumented endpoints to enhance your API security posture.

October 17, 20256 min

API Security

Zero Trust API Security: Upgrade Your Cyber Defense Today

Enhance your cybersecurity with Zero Trust API Security, ensuring robust access control and data protection against evolving threats.

October 17, 2025 10 min

API Security

BOLA Explained: The Threat No One’s Testing

Learn why BOLA is the #1 API risk — and how Apisec’s automation can reveal and block it before damage is done.

April 21, 20255 minutes

API Security

Software-Defined Vehicles: Are Your APIs Driving You Into Risk?

As cars go cloud-native, their APIs become targets — automated security testing helps ensure safety on the roads.

February 19, 20257 minutes

API Security

APIsec presents the 2024 API Security Market Report

Strong API testing prevents critical vulnerabilities before launch. When overlooked, API risks can derail releases and create severe security impact.

March 13, 20245 min.

API Testing

Internal APIs at Risk: Why Testing Matters

Internal APIs aren’t immune — automated testing uncovers hidden vulnerabilities that traditional tools often skip.

March 4, 20245 minutes

API Security

2024 API Security Best Practices

APIsec’s AI-powered red team finds real API vulnerabilities—no false positives and no manual effort. Pen test your API in minutes.

January 8, 20245 minutes

API Security

Upcoming DSS 4.0 Deadline for PCI Compliance

Learn about DSS 4.0's new API security requirements for PCI compliance. March 2024 deadline approaches - prepare your API program now.

January 3, 20245 minutes

API Security

Edulog API Breach Explained: BOLA Risks & Fixes

A deep dive into the Edulog Parent Portal API breach, what caused the BOLA exposure, and how teams can prevent similar API attacks.

December 15, 20235 minutes

OWASP

2023 OWASP API Top Ten

Paidy sought full API security coverage on every release, automated integration testing, and fast issue reporting to developers.

December 12, 202313 minutes

API Security

HIPAA vs Cures Act: Navigating Privacy & Interoperability

In this article, you will learn how to balance data privacy (HIPAA) with data access (EHR interoperability)

March 21, 20235 mins

API Security

How to Choose an API Security Tech Stack

In this article, you will learn how to choose an API security tech stack based on your security goals and needs.

November 15, 20226 mins

API Testing

Top 5 Burp Suite Alternatives for API Security Testing

This article discusses five alternatives to Burp Suite that you should consider.

November 15, 20225 mins

API Testing

Burp vs ZAP: Which Finds More API Bugs?

Compare Burp Suite and OWASP ZAP for API security testing. In-depth analysis of features, pricing, automation, and OWASP Top 10 coverage — updated for 2026.

November 14, 20226 mins

FinTech

OCC 2023 Plan: What It Means for Banks & FinTech Security

This article covers the top objectives from OCC's 2023 Bank Supervision Operating Plan and how you can get a jump start protecting your FinTech APIs.

November 7, 20225 minutes

API Testing

Best Pen-Testing Tools for Modern APIs

Compare today’s top pen-testing tools — and learn why automated API testing is the missing piece in your security strategy.

September 16, 20226 mins

API Security

API Testing Automation: How It Transforms DevSecOps

Bug Bounty programs have been the norm for a while, but they often leave your APIs more vulnerable than before; this article explains why.

July 19, 20227 minutes

API Testing

The Hidden Risks of API Monitoring That Leave APIs More Vulnerable

In this blog post, we'll take a look at the most critical vulnerabilities API monitoring misses that actually leave your APIs at risk.

July 12, 20225 minutes

API Testing

Shift Left Security: The Ultimate Guide

Find out how shift left impacts security and identify steps you can take to implement it to boost your security posture.

March 31, 202415 mins read

API Testing

Shift Left for DevOps: Key Benefits and 5 Best Practices to Follow

Find out how shift left can help your business and explore some best practices to get you started.

May 19, 20225 mins read

API Testing

Shift-Left vs Traditional Testing: Choosing the Best Approach

In this guide, you will learn how shift left testing benefits your business and how to build a strategy that implants this approach.

May 16, 20226 mins

API Security

What is Broken Object Level Authorization (BOLA) and How to Fix It

Use this guide to learn how to protect yourself from #1 API security threat according to OWASP.

May 11, 20226 mins

API Testing

Penetration Testing Best Practices for Every Stage of Testing

APIs power modern applications but remain top attack targets. Discover why securing APIs is now more critical than ever.

May 13, 20225 mins

API Security

Business Logic Flaws in APIs: The Silent Threat

Business constraint exploits can break your app's logic — automated testing spots them before attackers do.

May 5, 20225 mins

API Security

HTTP Verb Tampering: Key Risks and Fixes

Move security left in your API lifecycle — automated testing finds flaws sooner, before code even reaches production.

May 2, 20226 mins

API Security

Sensitive Data Exposure: What It Is and How to Avoid It

Sensitive Data Exposure poses a serious threat to businesses. Find out what it is and how to prevent it.

April 20, 20225 mins

Tutorials

How to Generate OpenAPI (OAS) Specs for REST APIs

Step-by-step guidance on generating OpenAPI (OAS) documentation for REST APIs, tools to use, and why specs matter for API security.

October 28, 20224 min read

Business Logic

How to Address Business Logic Flaws During Application Design

In this article, you will learn how to address business logic flaws during application design to protect yourself from cyber threats.

April 12, 20225 min read

Business Logic

Business Logic vs Application Logic in APIs

Business logic refers to the rules and procedures that govern a business, including things like pricing, discounts, inventory levels, customer eligibility, etc. Application logic, on the other hand, is the code that implements those business rules within a specific application.

January 29, 20266 min read

Business Logic

5 Real Business Logic Failures That Led to Major Breaches

Improper Inventory Management (OWASP 9) exposes hidden API risks. See how the Experian breach unfolded and how APIsec automates discovery and protection.

January 27, 20266 min read

Business Logic

Why Business Logic Vulnerabilities Are Your #1 API Security Risk

In this guide, you will learn why business logic vulnerabilities are so dangerous for API security and how to protect against them.

February 3, 20246 min read