4.9/5 on G2 and Capterra
Audit-supporting reports: Verified documentation mapped to SOC 2, HIPAA, PCI, and ISO 27001.
Human-Led Testing: Experienced security testers safely exploit vulnerabilities to show real-world business risk.
Clear scoped pricing: Know your full cost upfront. Scope and assumptions confirmed before testing starts.
Trusted by Companies That Can’t Afford Mistakes
1000+
Penetration tests conducted
Streamlined
Portal-based
delivery
25,000+
Vulnerabilities discovered
85+
security, IT, cloud, and compliance certifications across the team
APIs are a major attack surface for modern applications. Broken authorization, mass assignment, excessive data exposure, and business logic abuse often require more than automated scanning to identify.
Automated tools can support discovery and coverage, but they can’t reliably determine whether a user, role, tenant, or token should be allowed to perform an action.
Red Sentry testers manually validate API behavior across endpoints, roles, and workflows to identify exploitable risk and provide clear remediation guidance.
Example: API Authorization Testing
GET /api/v2/users/{id}/billing
Tested with:
- Low-privilege user token
- Manager token
- Suspended-user token
- Unauthorized request
We test API endpoints across roles, tenants, and token states to identify broken authorization, exposed data, and access-control gaps scanners often miss.
Why Security Leaders Choose Red Sentry
for API Penetration Testing
Jira integration for remediation tracking - Findings become actionable tickets with severity, evidence, and reproduction steps.
Applicable findings from one engagement may support multiple framework evidence needs when compliance mapping is included in scope - Our testing maps to SOC 2, HIPAA, PCI, and ISO 27001.
Speed Without Shortcuts – We move quickly once scope, access, and scheduling are confirmed.
Clear Scoping and Pricing – Once scope inputs are complete, we confirm assumptions, effort, pricing, and scheduling options.
Compliance-Supporting Reports
Our reports map directly to the compliance frameworks SaaS companies need most: SOC 2, HIPAA, PCI, ISO 27001.
When included in scope, applicable findings can be mapped to relevant framework areas and used to support audit and compliance evidence requests.
Get clear, validated API findings your team can act on. Our reports include evidence, impact, reproduction steps, and remediation guidance, with compliance mapping included when it’s part of the engagement.
Our API Testing Covers:
• OWASP API Security Top 10 coverage, mapped where applicable
• Broken authentication and authorization
• JWT handling issues and OAuth/OIDC implementation weaknesses
• Broken Object Level Authorization (BOLA/IDOR) and Broken Function Level Authorization (BFLA)
• Mass assignment, excessive data exposure, and business logic abuse
• Role escalation paths, privilege boundary issues, and multi-tenant access-control gaps
• Server-side request forgery, unsafe consumption of APIs, and third-party integration risks
• REST, GraphQL, gRPC, and WebSocket APIs when in scope
Testing is performed by Red Sentry security testers using human-led validation, OWASP API Security guidance, and NIST SP 800-115-aligned assessment practices.
You're in Good Hands
How it works?
Scoping Call
Submit the form and schedule a scoping call. We’ll review your API environment, auth model, endpoints, roles, goals, and timeline.
Scope & Schedule
We confirm scope, assumptions, pricing, access needs, and testing dates. Expedited engagements and U.S.-only staffing can be accommodated when available.
Human-Led Testing
Red Sentry security testers assess in-scope APIs, validate reportable findings, and document evidence, impact, and remediation guidance.
Reporting & Remediation Testing
You receive a clear technical report and executive summary where appropriate. One round of remediation testing is included for reported findings when requested within 90 days of final report delivery.
What is API penetration testing?
API penetration testing is authorized security testing of in-scope API endpoints and workflows. Red Sentry tests REST, GraphQL, gRPC, and WebSocket APIs when applicable, with a focus on broken authorization, authentication weaknesses, mass assignment, excessive data exposure, business logic flaws, and OWASP API Security Top 10 risks.
Do you test REST and GraphQL APIs?
Yes. REST, GraphQL, gRPC, and WebSocket APIs can all be included in scope. We scope the assessment around the API technologies, authentication model, user roles, environments, and endpoints you actually use.
How do you handle authentication and rate limiting during testing?
We work with your team to provision test credentials for the roles and privilege levels included in scope. Rate limits, source IP allowlisting, WAF behavior, and test windows are coordinated during scoping so testing can reflect realistic conditions while minimizing production impact.
Will the test impact production?
We prefer staging or production-mirror environments when available. If production testing is required, we coordinate approved windows, rate limits, source IPs, and escalation contacts before testing begins. Destructive testing is not performed, and higher-impact techniques are controlled through the agreed rules of engagement.
Can your API penetration testing support SOC 2, HIPAA, or PCI DSS compliance?
Yes. API penetration testing can support compliance and audit evidence requests when APIs are part of the assessed environment. When included in scope, applicable findings can be mapped to relevant framework areas, and reports include evidence, impact, and remediation guidance your team can use for auditor review.
What types of vulnerabilities do you typically find in APIs?
Common API findings include broken authorization, BOLA/IDOR, BFLA, mass assignment, excessive data exposure, SSRF, weak rate limiting, JWT/OAuth implementation weaknesses, and business logic flaws.
What’s the difference between automated API scanning and API penetration testing?
Automated tools can help identify known issues, exposed endpoints, and common misconfigurations. API penetration testing goes deeper by manually validating authentication, authorization, role boundaries, business logic, data exposure, and workflow abuse. The result is evidence-based reporting with real impact and remediation guidance, not just scanner output.
How fast can you start?
We can move quickly once scope inputs are complete. For API testing, that usually means endpoint counts, API documentation, authentication model, user roles, environments, testing restrictions, and reporting deadlines. Once we have that information, we can provide a scoped quote and confirm scheduling options. Expedited timelines may be possible depending on scope, access readiness, tester availability, and staffing requirements.
Do you offer remediation testing after we fix vulnerabilities?
Yes. Red Sentry includes one round of remediation testing for findings identified in the final report, when requested within 90 days of report delivery. During remediation testing, our team validates whether the reported findings have been resolved, updates the finding statuses, and provides remediation testing results.
What can I expect from a Red Sentry API penetration test report?
Reports include validated findings, severity ratings, evidence, affected endpoints, reproduction steps, business impact, and remediation guidance. When included in scope, applicable findings can support compliance or audit evidence needs. One round of remediation testing is included for reported findings when requested within 90 days of final report delivery.
How is pricing determined for Red Sentry's API penetration testing?
Pricing is based on API scope and complexity, including endpoint count, auth model, user roles, documentation, business logic, sensitive data, testing restrictions, and reporting needs. We confirm scope, assumptions, and pricing before testing begins.