API Security Testing
APIs are the #1 attack vector in modern applications. Xentinel discovers, inventories, and continuously tests your REST and GraphQL APIs for the OWASP API Security Top 10 — with no agents and no source code required.
OWASP API Security Top 10 coverage
The most critical API security risks — and the ones Xentinel tests for automatically.
Broken Object Level Authorization
Access other users' objects by manipulating IDs in API calls
Broken Authentication
Weak tokens, missing auth on endpoints, JWT flaws
Broken Object Property Level Auth
Mass assignment, excessive data exposure
Unrestricted Resource Consumption
No rate limiting, missing pagination limits
Broken Function Level Auth
Access admin functions as regular user
Security Misconfiguration
Verbose errors, open CORS, debug endpoints in production
How API security testing works
API discovery
Xentinel crawls your domains for API endpoints — REST paths, GraphQL endpoints, Swagger/OpenAPI specs, and JavaScript-referenced URLs. We build a complete API inventory including shadow APIs.
Schema analysis
For GraphQL, we perform introspection to map the full schema. For REST, we analyze response structures and infer parameter types to build effective test cases.
Active security testing
Each endpoint is tested for authentication bypass, authorization flaws, injection vulnerabilities, excessive data exposure, and rate limiting gaps using OWASP API Top 10 methodology.
Frequently asked questions
What is the OWASP API Security Top 10?
The OWASP API Security Top 10 is a list of the most critical security risks specific to APIs. Unlike the standard OWASP Top 10 for web apps, it focuses on risks unique to API architectures — broken object authorization, excessive data exposure, lack of rate limiting, and others that standard web scanners miss.
Does Xentinel test both REST and GraphQL APIs?
Yes. Xentinel discovers and tests REST APIs (JSON/XML) and GraphQL endpoints. For GraphQL, we perform introspection to map the schema and test queries and mutations for injection, authorization bypass, and information disclosure.
How does Xentinel discover APIs I might not know about?
Xentinel's attack surface discovery crawls your domains for API endpoints — checking common paths (/api/, /v1/, /graphql, /swagger), JavaScript files, and network traffic patterns to build a complete API inventory, including shadow APIs your team may have forgotten.
Secure your APIs before attackers map them
Free API scan. No source code. No agents. Results in minutes.