Automated API Penetration Testing (Pentesting): Find Vulnerabilities Before Attackers Do
Manual API testing reviews happen once a year. Your API deploys every day. ApyGuard's automated API penetration testing runs on every deployment, covering all ten OWASP API Security Top 10 categories with AI-generated attack requests tailored to your specific API endpoints and schema.
Import your OpenAPI spec, configure authentication, and get a prioritized vulnerability report in under 30 minutes. No scheduling, no engagement letters, no waiting.
Automated pentesting from $129/month — compared with a typical $5,000–$30,000 manual engagement.
Schema-aware
tests tailored to endpoint definitions
Reviewable
findings with request and response evidence
Repeatable
security checks for release workflows
Actionable
remediation guidance for developers
Cost and coverage
Manual API pentest cost vs. continuous ApyGuard testing
A conventional API penetration test often costs $5,000–$30,000 for one scoped engagement. ApyGuard starts at $129/month, with the current Basic 50-endpoint option at $199/month, so teams can repeat automated checks between formal assessments instead of paying for a new engagement after every release.
| Comparison | Conventional manual pentest | ApyGuard automated testing |
|---|---|---|
| Typical cost | $5,000–$30,000 per engagement | From $129/month |
| 50-endpoint option | Quoted after scoping | $199/month on the current Basic tier |
| Delivery model | Scheduled, point-in-time engagement | Repeatable scan for development and release workflows |
| Time to feedback | Commonly measured in weeks | Most scans complete in under 30 minutes |
| Best use | Expert exploration, compliance, and independent assurance | Continuous coverage between manual assessments |
From Spec to Vulnerability Report in Four Steps
Connect your API once. ApyGuard handles the attack generation, request execution, and findings triage automatically.
Connect your API
Import your OpenAPI spec or use the ApyGuard browser extension to capture your API endpoints. ApyGuard reads your endpoint definitions, parameters, and authentication requirements.
Configure auth and scan scope
Provide API keys, auth tokens, or OAuth credentials for authenticated endpoints. Select which OWASP API Top 10 categories to include -- or run a full scan across all ten.
AI generates attack requests
ApyGuard's AI generates attack payloads tailored to each endpoint's schema, parameters, and authentication model. Not signature-based -- each request is adapted to your specific API structure.
Receive a prioritized vulnerability report
Every finding is categorized by OWASP category, severity (Critical / High / Medium / Low), and affected endpoint. Each entry includes the request that triggered the finding and the recommended fix.
No OpenAPI spec yet? Use the ApyGuard browser extension to capture your API endpoints and generate a spec automatically.
OWASP API Security Top 10-Aligned Testing
ApyGuard tests for every category in the OWASP API Security Top 10 (2023) with attack requests adapted to your specific API schema and authentication model.
Broken Object Level Authorization (BOLA)
Tests whether one user can access or modify another user's objects by manipulating resource IDs.
Broken Authentication (Broken Auth)
Probes authentication mechanisms for weaknesses: missing token validation, weak JWT secrets, expired token acceptance.
Broken Object Property Level Authorization (Mass Assignment)
Tests whether endpoints expose or accept object properties they should not -- including admin fields and hidden attributes.
Unrestricted Resource Consumption (Rate Limiting)
Verifies that endpoints enforce rate limits, payload size limits, and resource quotas to prevent abuse.
Broken Function Level Authorization (BFLA)
Tests whether standard users can access admin or privileged functions by changing HTTP methods or URL paths.
Unrestricted Access to Sensitive Business Flows (Business Logic)
Identifies flows that can be exploited at scale -- bulk discount abuse, automated account creation, reservation hoarding.
Server Side Request Forgery (SSRF)
Tests whether endpoints that accept URLs or file paths can be tricked into making internal network requests.
Security Misconfiguration (Misconfiguration)
Checks for missing security headers, verbose error messages, default credentials, and open CORS policies.
Improper Inventory Management (Shadow APIs)
Discovers undocumented or deprecated endpoints that are still active but not in the official API specification.
Unsafe Consumption of APIs (3rd Party)
Evaluates whether your API trusts data from third-party integrations without proper validation or sanitization.
AI-Generated Attack Requests, Not Signatures
Traditional API scanners replay a library of pre-written attack payloads against every endpoint. If your API uses unusual parameter names, custom response structures, or non-standard authentication, signature-based scanners miss the vulnerabilities specific to your implementation.
ApyGuard reads your OpenAPI specification and generates attack requests tailored to each endpoint's actual schema. A BOLA test for your /users/{userId}/orders endpoint uses real user IDs from your API, not generic numeric sequences. A mass assignment test targets the exact object properties your API accepts, not a generic list of common field names.
This approach produces findings tied to requests that your specific API responded to unexpectedly, giving teams concrete evidence to review.
Add a Pentest Gate to Your CI/CD Pipeline
ApyGuard integrates with GitHub Actions, GitLab CI, and Jenkins. Add a security scan step that runs on every pull request or deployment. The scan exits with a non-zero status on critical or high findings, blocking the build before a vulnerability reaches production.
- name: API Pentest Scan
uses: apyguard/pentest-action@v1
with:
api-spec: ./openapi.yaml
api-url: ${{ secrets. API_URL }}
api-key: ${{ secrets. APYGUARD_KEY }}
fail-on: highThe same configuration works for GitLab CI and Jenkins with equivalent syntax. API credentials are passed as environment secrets and are never written to logs or build artifacts.
What a Scan Report Includes
Every finding includes enough context to reproduce, understand, and fix the vulnerability without additional investigation.
Findings by severity
Each vulnerability is classified as Critical, High, Medium, or Low based on exploitability and business impact.
Exact request and response
The scan report includes the full HTTP request that triggered the finding so your team can reproduce it immediately.
Remediation steps
Each finding includes a plain-language explanation and a specific code-level recommendation for the fix.
CI/CD gate status
When run in a pipeline, the report includes a pass/fail status and a machine-readable exit code for build automation.
After remediating findings, use behavior profiling to confirm fixed endpoints stay fixed -- daily authenticated scans alert you the moment a response regresses.
Validate Endpoint Risk Chains Before Release
ApyGuard correlates endpoint and path-level findings into a prioritized remediation timeline, from initial authorization failures to confirmed sensitive data exposure.
Simulation Session
API Endpoint Risk Correlation
Risk Discovery Timeline
- T+00:00Critical
BOLA Validation Failure Detected
Runtime analysis flags GET /v1/accounts/{accountId} for missing object-level authorization enforcement.
- T+02:14High
Sensitive Fields Exposed in Response
Response schema includes unmasked PII fields (email, phone, billing metadata) beyond least-privilege requirements.
- T+06:41Critical
Chained Endpoint Risk Confirmed
Correlation engine confirms a reproducible vulnerability path from BOLA to data exposure across account and billing routes.
Executive Summary
ApyGuard identified an authorization control gap and correlated it with schema overexposure on adjacent routes, producing a validated remediation path.
Risk Score
9.4 / 10
Impacted Endpoints
3
Sensitive Fields Exposed
12
Affected API Paths
27
Recommended Action
Enforce object-level authorization on all ID-based routes, minimize response schemas, and add CI contract checks for sensitive field leakage.
Final Impact
Chained vulnerability confirmed from BOLA to sensitive data exposure across related API paths. Business impact includes compliance risk, over-disclosure of sensitive data, and elevated audit findings.
Frequently Asked Questions
How much does an API security assessment cost for about 50 endpoints?
ApyGuard's current Basic option for 50 endpoints is $199 per month. A conventional manual API penetration test for a similar scope often costs $5,000–$30,000 per engagement, depending on authentication, roles, business logic, environment, reporting, and retesting requirements.
How long does an automated API pentest scan take?
Most APIs complete a full OWASP API Top 10 scan in under 30 minutes. Scan time depends on the number of endpoints, authentication flows, and the depth of testing configured.
What authentication configuration is needed?
ApyGuard supports API key authentication, Bearer token authentication, and OAuth 2.0 client credentials. Credentials are configured for the scan and used to exercise authenticated endpoints.
How do findings get to developers?
Findings are available in the ApyGuard dashboard with request and response evidence and remediation guidance. CI/CD workflows can use finding severity as a release gate.
Does automated API pentesting replace a manual penetration test?
No. Manual pentests remain appropriate for formal compliance evidence, expert exploratory testing, and complex one-off assessments. ApyGuard adds repeatable coverage between those point-in-time engagements and can reduce the scope of issues that reach the manual review.
Find Vulnerabilities Before Your Next Deployment Ships
Connect your API spec and run your first automated penetration test in under 30 minutes. No credit card required.
Review the API security best practices guide for the full framework covering authentication, authorization, rate limiting, and runtime monitoring.