Secure Every Endpoint You Expose
Whether you run public REST APIs, an internal GraphQL gateway, gRPC microservices or partner-facing webhooks, every endpoint is a potential entry point. Our testing goes beyond surface-level scanning to manually probe object-level access, token handling, rate limiting and the way your business logic can be abused.
Each engagement is scoped to your architecture and threat model. We test with and without valid credentials, across every role, so we can prove exactly which data and actions an attacker could reach at each privilege level.
You receive a developer-ready report with reproducible proof-of-concept requests, severity ratings, and remediation guidance mapped back to the standards your auditors and customers care about.
Our API Penetration Testing Methodology
A structured, standards-driven workflow that combines automated discovery with deep manual testing, aligned to the Penetration Testing Execution Standard (PTES).
Scoping & Specification Review
We ingest your OpenAPI/Swagger, GraphQL schema or Postman collection, agree the engagement workflow, and map every documented endpoints before testing begins.
Discovery & Enumeration
Active and passive discovery of hidden endpoints, parameters, API versions and shadow APIs, building a complete picture of the true attack surface.
Authentication & Session Testing
We attack token issuance and validation, JWT flaws, OAuth 2.0 and API-key handling, session fixation and credential-stuffing resistance.
Authorization Testing
Systematic role-by-role, object-by-object access-control testing to uncover broken object-level (BOLA), function-level and property-level authorization.
Injection & Input Validation
Testing for SQL, NoSQL, command and SSRF injection, mass assignment, insecure deserialization and schema-validation bypasses.
Business Logic & Abuse Cases
Manual exploitation of workflow flaws, rate-limit and resource-consumption abuse, and chained vulnerabilities that reflect real attacker behaviour.
Reporting & Optional Remediation Verification
Prioritised findings with reproducible evidence and fix guidance, followed by an retest to verify your remediation.
OWASP API Security Top 10 (2023) Coverage
Every engagement provides explicit, documented coverage of all ten categories in the current OWASP API Security Top 10, so you can evidence compliance to auditors and customers.
API1:2023 Broken Object Level Authorization
We verify that users can only access objects they own by manipulating resource identifiers across every role and endpoint.
API2:2023 Broken Authentication
Testing weak token generation, missing validation, credential stuffing and flawed password or key recovery flows.
API3:2023 Broken Object Property Level Authorization
Detecting excessive data exposure and mass assignment where the API returns or accepts properties a user should not control.
API4:2023 Unrestricted Resource Consumption
Probing missing rate limits, pagination abuse and costly operations that enable denial-of-service and inflated billing.
API5:2023 Broken Function Level Authorization
Confirming that administrative and privileged functions cannot be invoked by lower-privilege or anonymous users.
API6:2023 Unrestricted Access to Sensitive Business Flows
Assessing whether critical workflows can be automated or abused at scale without adequate anti-automation controls.
API7:2023 Server Side Request Forgery
Testing endpoints that fetch remote resources for SSRF that could reach internal services and cloud metadata.
API8:2023 Security Misconfiguration
Reviewing CORS, verbose errors, missing security headers, default settings and unpatched components.
API9:2023 Improper Inventory Management
Hunting deprecated, undocumented and shadow API versions and hosts that widen the attack surface.
API10:2023 Unsafe Consumption of APIs
Evaluating how your API trusts and processes data from third-party and upstream services.
What We Test
- REST and JSON APIs
- GraphQL endpoints and introspection
- gRPC and Protocol Buffers services
- SOAP and XML web services
- WebSocket and real-time APIs
- Webhooks and callback handlers
- OAuth 2.0 and OpenID Connect flows
- JWT and API-key authentication
- Mobile and single-page-app backends
- Third-party and partner integrations
Standards & Frameworks
- OWASP API Security Top 10 (2023): full category-by-category coverage.
- OWASP ASVS: Application Security Verification Standard controls.
- OWASP WSTG: Web Security Testing Guide techniques.
- PTES: Penetration Testing Execution Standard workflow.
What You Receive
- Executive summary for stakeholders
- Technical findings with severity ratings
- Reproducible proof-of-concept requests
- Assessment covered OWASP API Top 10
- Role and endpoint access-control matrix
- Prioritised remediation guidance
- Developer-ready fix recommendations
- Remediation Verification
Why Standards-Aligned Testing Matters
Demonstrable Compliance
Coverage mapped to recognised standards gives you defensible evidence for SOC 2, ISO 27001, PCI DSS and customer security questionnaires.
Consistent, Repeatable Results
A standards-driven methodology means every engagement is thorough and comparable over time, so you can track your security posture as it improves.
Beyond Automated Scanning
Scanners cannot understand your business logic or authorization model. Manual, standards-based testing finds the high-impact flaws they miss.
Actionable for Developers
Findings are tied to concrete controls and reproducible requests, so your engineers can fix issues quickly and verify the fix.