What this page helps you understand
API security is strongest when teams review discovery, authorization, authentication, data exposure, and error behavior together.
What Fixnx checks
Authentication
Authorization
IDOR
CORS
Tokens
Debug routes
API security checklist for public apps
Start by listing the API routes that are reachable from the browser. If you cannot describe what each route does, it is hard to defend it.
Next, test whether routes require the right authentication, enforce object-level authorization, avoid exposing sensitive fields, and handle errors safely.
Fixnx helps by discovering and classifying API endpoints, then attaching evidence to security findings.
Run this check on your site
Enter a public URL and get a live Fixnx report with security, SEO, and performance checks.
Scan now. Google sign-in is only needed to unlock fix guidance.
FAQ
What is the most common API security issue?
Broken authorization is common, especially around user-owned resources such as baskets, orders, invoices, and profiles.
Do I need authenticated scans for API testing?
Authenticated scans give stronger coverage for protected routes and cross-user authorization checks.