
Secureroot's API security assessment services help SaaS, fintech, and B2B platform builders find security weaknesses in REST and GraphQL APIs before they're exploited. OWASP API Top 10 aligned. ISO 27001 certified. Trusted by MoJ Kuwait and India's leading enterprises.

















API security assessment is a structured security exercise where certified ethical hackers test your APIs – REST endpoints, GraphQL queries, microservices, and webhook integrations – to find vulnerabilities before real attackers do. Modern attackers don’t target your UI; they target your APIs directly. That’s where the sensitive data lives, where the business logic runs, and where most authorization decisions are made.
API testing requires methodology distinct from traditional web app testing. APIs lack a visible UI, so vulnerabilities are easier to miss with automated scanners. APIs often skip the security checks the UI enforces. Authorization is granular and complex – one user shouldn’t be able to access another user’s resources by changing IDs. Rate limiting is critical to prevent scraping and brute-force attacks. Our methodology specifically targets the OWASP API Security Top 10 – the standard framework for API vulnerabilities.
If your business runs on APIs – and most modern businesses do – they’re your biggest attack surface. Public APIs serving mobile apps, B2B partner APIs, microservice-to-microservice calls, and webhook integrations all expose business logic and data. Indian regulators (RBI Account Aggregator Framework, IRDAI Insurance APIs Framework, DPDP Act) require demonstrable API security testing. Enterprise B2B customers demand API audit evidence before integrating. And API breaches now cause more data exposure than UI-based attacks. API security assessment is the foundation of modern application security.


We follow OWASP API Security Top 10, OWASP ASVS, and NIST SP 800-95 frameworks. Every API engagement runs through these six steps.

We catalog every API endpoint, parameter, authentication method, and consumer (web, mobile, partner) – building a complete API attack surface map.

We review your OpenAPI/Swagger specs, GraphQL schemas, and Postman collections – identifying authorization gaps, sensitive data exposure, and design flaws before testing.

Industry tools (Burp Suite, Postman, Apidog, OWASP ZAP) scan for known API vulnerabilities, broken auth, rate limit issues, and OWASP API Top 10 patterns.

Senior consultants exploit BOLA (Broken Object Level Authorization), BFLA (Broken Function Level Authorization), mass assignment, and business logic flaws that scanners miss.

Every finding documented with API request/response examples, CVSS scoring, business impact, and remediation guidance. Reports your auditors and integrating customers will accept.

Once your team patches the findings, we verify the fixes at no extra cost. Engagement only closes when every critical and high finding is actually fixed.

Click any area to expand. Every engagement covers all 8 OWASP API Top 10 categories – scope depth varies based on your API surface and complexity.
BOLA is the #1 API vulnerability according to OWASP. We test whether one user can access another user's resources by manipulating object IDs in API requests - order IDs, user IDs, document IDs, customer IDs. We test horizontal access (user A accessing user B's data) and vertical access (regular user accessing admin resources). BOLA findings expose customer PII, payment data, and business records at scale. Maps to OWASP API1:2023.
We test API authentication mechanisms end-to-end: JWT token security (algorithm confusion, weak secrets, missing validation), OAuth 2.0 implementation flaws, API key handling, refresh token rotation, session fixation, brute-force protection, account enumeration via timing attacks, and password reset flow security. We also test authentication bypass attempts through HTTP verb tampering, JSON parsing inconsistencies, and authorization header manipulation. Maps to OWASP API2:2023.
We test for excessive data exposure (API returning more fields than needed — passwords, internal IDs, financial details), mass assignment vulnerabilities (user updating fields they shouldn't, like 'isAdmin' or 'accountBalance'), and improper field-level access control. These vulnerabilities often hide in seemingly innocuous endpoints - a user profile update API that accepts an 'isAdmin' parameter, or a search API that returns full database records. Maps to OWASP API3:2023.
We test for missing or weak rate limiting, lack of request size validation, missing pagination controls, and unrestricted query complexity in GraphQL (allowing nested query attacks that exhaust server resources). Without proper rate limiting, attackers can brute-force credentials, scrape data at scale, and cause denial of service. We also test for billing-impact vulnerabilities - cloud APIs where unrestricted calls can cost the business thousands. Maps to OWASP API4:2023.
We test whether endpoints meant for specific user roles (admin-only, partner-only, internal-only) are accessible to other users. Common findings: admin endpoints accessible to regular users by guessing URLs, internal microservice APIs reachable from public networks, partner API endpoints accessible without proper partner credentials. BFLA is especially dangerous in SaaS multi-tenant architectures where role separation is critical. Maps to OWASP API5:2023.
Beyond technical vulnerabilities, we test business logic abuse: bulk account creation (bot attacks on sign-up APIs), bulk credential validation (credential stuffing), payment manipulation (changing amounts or currencies), workflow bypasses (skipping payment to reach delivery), and parameter tampering in business-critical flows. These vulnerabilities only emerge when an experienced tester understands what the API is supposed to do - not just what it allows. Maps to OWASP API6:2023.
We test for SSRF in APIs that fetch URLs or files (image upload via URL, webhook integration, third-party API proxies) - allowing attackers to access internal services, cloud metadata endpoints, and bypass firewalls. We also test for injection vulnerabilities: SQL injection in API parameters, NoSQL injection (MongoDB, CouchDB), command injection in URL parameters, LDAP injection, and template injection. Maps to OWASP API7:2023 and API8:2023.
We catalog your API inventory: production, staging, deprecated v1, internal-only - checking each for proper documentation and security controls. Often, old API versions remain accessible with weaker security than current versions. We also audit your consumption of third-party APIs (payment gateways, analytics, SMS providers) for proper credential storage, certificate validation, and data sanitization. Many breaches happen through shadow APIs and unsafe third-party integrations. Maps to OWASP API9:2023 and API10:2023.








M2i Consulting
SecureRoot's expertise in banking technology cybersecurity was crucial for our Varta platform's success. Their comprehensive VAPT assessment and BFSI compliance framework enabled us to secure communications for India's largest banks while maintaining the performance that drives 3x revenue uplift for our clients. Their security solutions directly contributed to our market leadership in customer communication management.
FCI CCM
SecureRoot demonstrated exceptional expertise in government digital services cybersecurity. Their comprehensive security assessment of our Sahl platform and electronic judicial systems exceeded our national security expectations. We now operate the most secure government digital services in the region, ensuring complete protection for citizen data and legal proceedings.
Ministry of Justice, Kuwait
SecureRoot's specialized healthcare cybersecurity expertise transformed our operations management platform security. Their comprehensive VAPT assessment and HIPAA compliance framework enabled us to deliver secure, efficient healthcare solutions while protecting sensitive patient data. We now provide our healthcare partners with industry-leading security alongside operational excellence.
HOM India Pvt Ltd

Straight answers, no marketing speak. If you don’t see your question here, just ask – info@secureroot.co.
API security assessment is a structured cybersecurity exercise where certified ethical hackers test your APIs — REST endpoints, GraphQL queries, microservices, and webhook integrations — to find security vulnerabilities before real attackers do. Coverage focuses on the OWASP API Security Top 10: broken object level authorization (BOLA), broken authentication, excessive data exposure, lack of rate limiting, broken function level authorization, mass assignment, and more. The output is an audit-grade report with reproduction steps, request/response examples, and remediation guidance.
API security assessment in India typically costs between ₹50,000 and ₹6,00,000 depending on API surface size, complexity, and authentication architecture. A small SaaS with 20-50 endpoints starts around ₹50,000-1,50,000. Mid-size fintech or B2B platforms with 100+ endpoints, OAuth flows, and webhooks run ₹1,50,000-4,00,000. Enterprise platforms with microservices architecture, partner APIs, and multi-tenant security needs reach ₹4,00,000-6,00,000. Secureroot provides transparent fixed-price quoting after a free 30-minute scoping call.
Yes, every Secureroot API security assessment covers both REST and GraphQL APIs by default. REST and GraphQL require different testing approaches: REST testing focuses on endpoint authorization, parameter validation, and HTTP verb misuse; GraphQL testing focuses on query complexity attacks, introspection abuse, batch query exploitation, and nested resolver authorization. We test gRPC, WebSocket, and SOAP APIs on request. Coverage maps to OWASP API Security Top 10 for both architectural styles.
Most API security assessment engagements complete in 1-3 weeks. A small SaaS with 20-50 endpoints takes 1-2 weeks. Mid-size fintech or B2B platforms with 100+ endpoints run 2-3 weeks. Complex platforms with microservices, partner APIs, and webhook integrations take 3-4 weeks. Source code review of API implementations adds 1-2 weeks. Free retest after remediation typically adds 3-5 business days. We provide clear timeline commitments in every engagement scope document.
Yes, every Secureroot API security assessment engagement covers all OWASP API Security Top 10 (2023) categories: broken object level authorization, broken authentication, broken object property level authorization, unrestricted resource consumption, broken function level authorization, unrestricted access to sensitive business flows, server side request forgery, security misconfiguration, improper inventory management, and unsafe consumption of APIs. We also test against OWASP ASVS for comprehensive API security verification.
We need: (1) API documentation - OpenAPI/Swagger spec, GraphQL schema, or Postman collection (we can also discover undocumented endpoints), (2) Test environment access - typically staging credentials, not production, (3) Test user accounts at different permission levels (regular user, admin, partner), (4) API base URLs and authentication endpoints, (5) Any specific business logic context that helps us understand what should be allowed vs blocked. We sign mutual NDAs before receiving any of this. If you don't have documentation, our recon phase will discover endpoints automatically.
Our API security assessment methodology prioritizes minimal production impact. We use rate-limited automated scanning to avoid overwhelming servers, perform destructive tests only against staging environments, and coordinate testing windows with your DevOps team. For mission-critical production APIs (payment gateways, healthcare systems), we use a hybrid approach: comprehensive staging testing plus non-invasive production checks. We monitor your APM and error rates during testing - most engagements produce zero operational impact.
Three ways to start: (1) Book a free 30-minute API scoping call - our senior consultants review your API architecture, identify priority testing areas, and recommend the right engagement tier. No obligation. (2) Email info@secureroot.co with API details (REST/GraphQL, number of endpoints, tech stack, compliance requirements, timeline) and we'll respond within one business day. (3) Call +91 73071 48874 during business hours. For urgent engagements (active audit deadline or partner integration milestone), we accommodate fast-track scoping.
No obligation. Our senior consultants will walk through your environment and share where the gaps are. Whether you work with us or not.

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SecureRoot's deep understanding of microfinance and financial inclusion cybersecurity challenges was transformational for our operations. Their comprehensive VAPT assessment and ESG compliance framework enabled us to secure our technology solutions while maintaining the efficiency our clients depend on. We now confidently serve major multilateral agencies with enterprise-grade data protection.