NeedSec logo
← Back to Services
API Penetration Testing

Deep API security testing for REST, GraphQL, and backend services

NeedSec tests APIs the way real attackers do — probing for broken authorization, insecure tokens, excessive data exposure, and logic vulnerabilities that automated scanners cannot detect. Every endpoint is tested manually with business context in mind.

Manual-led testing

Every assessment is led by a qualified security engineer — human judgment, not just automated scanning.

Evidence-backed findings

Each vulnerability includes proof of concept, reproduction steps, and a business-impact risk rating.

Actionable fix guidance

Reports are structured for developers and decision makers so remediation can start immediately.

What We Test

Focused testing against realistic attack paths

NeedSec combines manual testing, structured methodology, and business-focused reporting to identify issues that matter — not just scanner noise.

01

Broken Object Level Authorization (BOLA/IDOR) — cross-user data access

02

Broken Function Level Authorization — admin endpoint access and role bypass

03

JWT weakness testing — algorithm confusion, weak secrets, and token forgery

04

API key and bearer token handling — exposure, reuse, and rotation gaps

05

GraphQL introspection, batching abuse, and deeply nested query attacks

06

Mass assignment — unsafe property binding and hidden field manipulation

07

Excessive data exposure — over-fetching and sensitive field leakage in responses

08

Rate limiting bypass — brute force, credential stuffing, and abuse prevention

09

CORS misconfiguration and cross-origin request exploit scenarios

10

Input validation — injection, type confusion, and parameter tampering

11

Sensitive data in URLs, logs, headers, and verbose error messages

12

Business logic chaining — multi-step API abuse and workflow manipulation

Deliverables

What you receive after every engagement

Every engagement concludes with a professional report package — written to drive action across your technical and business teams.

Affected endpoint inventory

Professional format with sufficient detail for both technical teams and business stakeholders.

Request and response evidence

Professional format with sufficient detail for both technical teams and business stakeholders.

CVSS-rated vulnerability list

Professional format with sufficient detail for both technical teams and business stakeholders.

Exploit path documentation

Professional format with sufficient detail for both technical teams and business stakeholders.

Business impact summary

Overview of test coverage, methodology, key findings, and recommended next steps.

Developer remediation guidance

Structured fix guidance ordered by priority so engineering teams can act immediately.

API security configuration notes

Professional format with sufficient detail for both technical teams and business stakeholders.

Retest verification

Post-fix verification confirming each vulnerability has been properly resolved.

Need help scoping this assessment?

Share your target systems, business goals, and timeline. NeedSec will help define the correct scope and testing approach.

Get a Quote