API security
API & backend security testing
We look through backend and API behavior for the common issues that actually matter: SQLi, XSS, headers, leaked info, auth bugs, WAF behavior, and unsafe responses.
Request a quoteWhat it gets you
- Catch obvious backend mistakes before users do
- Find exposed info and over-broad API responses
- Give developers clear fix notes
- Improve login, headers, and request handling
Engagement models
Typical engagement: 2–5 business days
Quick API check
A focused pass over important endpoints, login, headers, and obvious bug classes.
Full backend pass
A broader review across endpoints, roles, returned data, and backend behavior.
Retest
A quick follow-up after the company fixes the reported issues.
Full scope and process
What we cover
A backend review focused on each request, what it returns, what headers say, what information leaks, and whether common bug classes are present.
- Request-by-request review of inputs, responses, and behavior
- SQL injection and unsafe query handling checks
- XSS and reflected input checks where API responses feed a frontend
- Headers, cookies, CORS, and security configuration
- Login, session, token, and API key handling
- WAF behavior and whether obvious bad requests are blocked
- Leaked information in errors, debug output, stack traces, or response bodies
- Overly broad responses, exposed tables, and APIs returning more data than needed
What your team gets
- List of tested endpoints and requests
- Finding report with severity and impact
- Reproduction notes for anything that looks vulnerable
- Header and configuration notes
- Suggested fixes written clearly
- Optional quick retest after fixes
How it runs
Scope the API
We agree on the endpoints, test accounts, roles, and actions that are approved for testing.
Review requests
We look at requests, responses, headers, auth behavior, returned data, and common injection points.
Check common bugs
We test for common issues like SQLi, XSS, weak headers, leaked info, WAF gaps, and auth mistakes.
Report clearly
You get clear notes with what was found, why it matters, and how to fix or retest it.
Good fit for
- SaaS platforms
- Mobile app backends
- Internal admin panels
- Customer portals
- Webhook-heavy products
- Teams preparing a new backend release