What this page helps you understand
APIs are often shipped faster than documentation. Fixnx discovers routes from browser traffic, links, JavaScript, and common paths, then classifies what each endpoint appears to handle.
What this scan checks
Endpoint discovery
Sensitive route classification
Auth surface
ID parameters
CORS behavior
Response evidence
API security starts with knowing what is reachable
Many API risks are not hidden in complex exploits. They come from endpoints that were meant to be internal, debug routes left exposed, or user-owned resources that do not enforce authorization consistently.
Fixnx helps by showing the discovered API surface, classifying endpoint purpose, and attaching evidence to high-risk findings. That makes it easier to talk about API security with developers and product owners.
Use API scanning after frontend releases, backend route changes, and authentication refactors.
Example Fixnx finding
Issue: Credentialed CORS allowed a foreign origin
Risk: High
Evidence: A sampled API response reflected a test Origin and allowed credentials in CORS headers.
Recommended fix: Use a strict origin allowlist, avoid reflecting arbitrary origins, remove credentialed CORS where not required, and retest sensitive API responses.
Credentialed CORS can let another website read protected API responses when authentication and authorization are not enforced carefully.
What to fix first
- Critical exposed files, admin panels, secrets, or takeover paths.
- Broken HTTPS, missing redirects, weak SSL/TLS behavior, or unsafe cookie handling.
- Confirmed injection, XSS, access-control, authentication, or sensitive API evidence.
- High-impact security headers and browser protections that reduce attack impact.
- Medium and low hardening recommendations after the risky public evidence is fixed.
Trusted resources behind this guidance
Recommended Fixnx path
Follow these related pages to move from the current topic into the right scanner, guide, report, or comparison page without mixing search intent.
Understand reachable pages, routes, forms, files, and API signals.
IDOR ScannerReview object access and authorization risk patterns.
Authentication Security TestingReview login, session, account recovery, and access behavior.
API Security ChecklistPlan API authorization, endpoint, and data exposure review.
Sample Security ReportSee how Fixnx presents findings, severity, evidence, and fix order.
Run this check on your site
Enter a public URL and get a live Fixnx report with security, SEO, and performance checks.
Only scan websites you own or have explicit permission to test. Fixnx is built for defensive security checks and website protection. Unauthorized scanning may be illegal.
Scan now. Google sign-in is only needed to unlock fix guidance.
FAQ
Does Fixnx discover API endpoints automatically?
Yes. It samples browser traffic, page links, forms, JavaScript hints, and common API paths within scope.
Can API authorization be fully proven without login contexts?
No. Full cross-user proof needs separate user contexts, such as userA and userB sessions.
What does API Security Scanner check first?
It starts with endpoint discovery, then reviews sensitive route classification, auth surface, and other public signals that can be checked safely from outside the site.
Can I use API Security Scanner on any website?
Only scan websites you own or have explicit permission to test. Fixnx is built for defensive security checks and website protection. Unauthorized scanning may be illegal.
Does API Security Scanner prove a site is completely secure?
No. A scan reports the public evidence it collected during a bounded test. It helps you find visible risk, but it cannot guarantee that every private workflow or server-side issue is safe.
Can Fixnx help me understand how to fix the findings?
Yes. Fixnx reports include evidence, severity, confidence, and remediation guidance so owners, developers, and security teams can decide what to fix first.