API Hardening

API Security Testing

Targeted security testing of REST, GraphQL, and gRPC APIs aligned with the OWASP API Security Top 10. Covers authentication, authorisation, business logic, injection, rate limiting, and schema-level abuse across documented and undocumented endpoints.

REST / GraphQL / gRPCOWASP API Top 10Auth & AuthorisationRate Limiting & AbuseSchema Analysis
Scope-based quote+ taxes
Contact usAll services
Process
6
phases
AI
4
tools
You get
7
deliverables

How it runs

  1. 01

    Scoping & Reconnaissance

    Define the API surface in scope, collect documentation (OpenAPI, GraphQL schema, Postman collections), gather credentials for each role, and confirm test environments and traffic windows.

  2. 02

    Endpoint Mapping & Discovery

    Enumerate all endpoints from documentation, traffic captures, and client analysis. Discover hidden, deprecated, or shadow APIs through directory brute force, schema introspection, and source review.

  3. 03

    Authentication & Authorisation Testing

    Test JWT handling, OAuth flows, API key management, session controls, and role boundaries. Probe for BOLA, BFLA, privilege escalation, and cross-tenant data access through object and function level checks.

  4. 04

    Injection & Business Logic

    Test inputs for SQL, NoSQL, command, GraphQL, and SSRF injection. Probe business logic for workflow bypass, mass assignment, race conditions, and parameter tampering specific to the API contract.

  5. 05

    Rate Limiting & Abuse Testing

    Validate rate limits, quotas, and anti-automation controls. Test for resource exhaustion via expensive GraphQL queries, batched calls, and unrestricted resource consumption flaws.

  6. 06

    Reporting & Retest

    Deliver a report mapped to OWASP API Top 10 with proof-of-concept requests, severity scoring, and developer-focused remediation guidance. Includes a retest of critical findings after fixes land.

AI assist

ai-toolkit.sh
AI-Assisted
$ cat tools.list
01
Endpoint DiscoveryAI-assisted enumeration of undocumented and shadow API endpoints from traffic and code
02
Schema AnalysisParse OpenAPI and GraphQL schemas to surface excessive data exposure and weak typing
03
Intelligent FuzzingGenerate context-aware payloads for each parameter type to maximise coverage with minimal noise
04
Auth Flow ModellingModel authentication and authorisation flows to identify object and function level access flaws
$ _

What you receive

  • Full API security report mapped to OWASP API Top 10
  • Inventory of documented and shadow endpoints
  • Proof-of-concept requests for every finding
  • Authentication and authorisation gap analysis
  • Business logic and rate limit findings
  • Developer-focused remediation guidance
  • Retest of critical and high findings

Ready to scope this engagement?

Every engagement is scoped individually. Get a tailored quote within 24 hours.

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