ISpectra Technologies
API VAPT · Core VAPT

API Security Testing REST, GraphQL, gRPC

Manual, adversary-driven API penetration testing aligned to OWASP API Security Top 10 and ASVS. BOLA, mass assignment, broken authentication, rate-limit, and business logic testing delivered in 10 business days.

OWASP API
Top 10 + ASVS
10 Days
Typical TAT
450+
APIs Tested
REST + Graph
gRPC + SOAP
Get Free Scoping Call See How It Works

Free Assessment

Request a API Security Testing Quote

24h Response
4.9 rating 500+ served
SSL Encrypted No spam, ever 100% Confidential
ISpectra VAPT RECON SCAN EXPLOIT VALIDATE REPORT RETEST SCOPING
Figure 1. ISpectra API Security Testing methodology at a glance: scoping, recon, scan, validate, exploit, report, and free retest with a VAPT certificate.
450+
APIs Tested
91%
BOLA/IDOR Found
10 Days
Average TAT
170+
Customers
4.9/5
Customer CSAT
Overview

What is API Security Testing Explained

API security testing is a manual, adversary-driven review of every endpoint your APIs expose - REST, GraphQL, gRPC, and SOAP - for authentication, authorisation, business logic, and data-exposure weaknesses. ISpectra combines the OWASP API Security Top 10 with deep business-logic abuse so your API pentesting covers what real attackers target.

API is now the largest attack surface in most enterprises. Mobile apps, single-page apps, partner integrations, and internal services all talk API. Most breaches in the last three years trace back to an API authorisation flaw: broken object-level authorisation, broken function-level authorisation, mass assignment, rate-limit abuse, and excessive data exposure. Scanners miss these because they are logic flaws, not CVE-class defects.

Our API penetration testing is manual, authenticated, multi-role, and mapped to the OWASP API Security Top 10 (2023) and ASVS Level 2. We use Burp Suite Professional, Postman, Insomnia, GraphQL-specific tooling, grpc-web clients, and custom ISpectra fuzzers to exercise every endpoint under tampered, replayed, and race-condition flows.

You get a named lead tester, a developer-grade report with code-level fix guidance, OpenAPI and GraphQL schema gap mapping, a free retest, and a signed VAPT certificate mapped to SOC 2, ISO 27001, PCI DSS, HIPAA, and DPDP control IDs.

REST

OpenAPI-driven coverage plus schema gap and parameter fuzzing.

REST API security testing

GraphQL

Introspection, query depth, aliasing, batch, and cost abuse.

GraphQL pentesting

gRPC+SOAP

gRPC reflection and SOAP XXE plus WS-Security testing.

Legacy and modern protocols

OWASP API

BOLA, BFLA, mass assignment, unrestricted resource, auth abuse.

Top 10 and ASVS

Business Logic

Race, state-machine, quota, and approval-chain exploitation.

Abuse-case testing
Why It Matters

Why API Security Testing Is a Revenue Lever

A clean VAPT report opens doors with enterprise procurement, lowers cyber insurance premiums, and shortens the audit cycle. Skip it, and every single one of those costs compounds.

With an ISpectra API Pentest

  • +OWASP API Security Top 10 coverage proven and evidenced
  • +BOLA, BFLA, and mass-assignment flaws found before customers do
  • +SOC 2 CC7.4, ISO 27001 A.8.29, and PCI DSS 6.2 evidence delivered
  • +Developer-grade report with per-endpoint fix hints and schema gap map
  • +Free retest plus a reissued VAPT certificate mapped to compliance controls

Without API Security Testing

  • −BOLA and BFLA flaws leak customer data and trigger regulator notices
  • −Mass assignment silently grants admin rights via crafted JSON
  • −Rate-limit gaps let a single script scrape your entire customer base
  • −Auditors reject API evidence and SOC 2 or PCI DSS slips a quarter
  • −Partner integrations break trust after an API-layer security incident
Compare Options

API Scan vs Manual API Penetration Testing

Pick the right test for your audit, buyer, or insurance deadline. Or run both in a single engagement for a 20 percent package discount.

Scan-only

Automated API Scan

Duration
Hours
Cost
Low
Scope
Schema, rate limit, TLS, obvious injections
Best For
CI gate, release-cycle hygiene
Report
Raw scan output, low context
Most Requested
Adversary-driven

Manual API Penetration Testing

Duration
2-3 weeks
Cost
From USD 4,200
Scope
BOLA, BFLA, mass assignment, business logic, rate-limit
Best For
SOC 2, ISO 27001, PCI DSS, HIPAA, DPDP
Report
Business impact narrative, developer fixes, retest

Our recommendation: Our recommendation: Run manual API penetration testing annually per major release, plus API scanning in CI to guard against regression. Customers on this cadence reduce critical API findings by 80 percent year over year.

What You Get

Everything in an ISpectra API Pentest

One engagement. One named lead tester. Eight deliverables. Zero scope creep.

01

OpenAPI and GraphQL Schema Audit

Schema gap analysis for REST (OpenAPI) and GraphQL (SDL).

02

Authentication and Session

JWT, OAuth, API key, SAML, mTLS, and refresh-token abuse.

03

BOLA and BFLA Testing

Broken object and function level authorisation across every role.

04

Mass Assignment and Excessive Data

JSON tamper and over-posting, sensitive data exposure.

05

Rate Limit and DoS

Quota abuse, cost-of-query GraphQL abuse, batching exploitation.

06

Business Logic Abuse

Race, state-machine, approval chain, and payment flow tampering.

07

Server-Side Injection

SQLi, NoSQLi, command, template, SSRF, XXE, and deserialisation.

Included Free 08

Free Retest + Certificate

Full retest of every finding plus reissued VAPT certificate.

API Security Testing kill chain 6-PHASE ATTACK NARRATIVE 01 Recon Passive OSINT, surface map 02 Scan Authenticated, multi-tool 03 Validate Manual proof, no false pos 04 Exploit Chained abuse, safe scoped 05 Report Dev-grade, audit mapped 06 Retest Free full retest, VAPT cert
Figure 2. The 6-phase ISpectra API Security Testing kill chain narrative. Every phase ships a deliverable you can show an auditor.
Methodology

Our 9-Step API Penetration Testing Methodology

OWASP API Security Top 10 (2023), ASVS, PTES, and CREST-aligned. Every finding is backed by a reproduction script, CVSS score, and a code-level remediation hint.

Scoping workshop, OpenAPI and GraphQL SDL import, tenant and role matrix, signed rules of engagement.

Deliverable: Schema + Scope

Undocumented endpoint hunting, version sprawl detection, and shadow-API identification.

Deliverable: API Surface Map

JWT, OAuth, API key, mTLS, refresh-token and session-replay testing.

Deliverable: Auth Findings

Object and function level authorisation testing across every role and tenant combination.

Deliverable: AuthZ Findings
Proof Stage

JSON tamper, over-posting, sensitive data return, and PII leak testing.

Deliverable: Exposure Findings

Race, state-machine, approval chain, quota, batching, and GraphQL cost abuse testing.

Deliverable: Logic Findings

SQLi, NoSQLi, command, template, SSRF, XXE, and deserialisation exploitation.

Deliverable: Injection Findings

Developer-grade report with per-endpoint fix hints, OWASP API mapping, CVSS 3.1 scoring, and live debrief.

Deliverable: Draft Report

Retest every finding and reissue the signed VAPT certificate for auditors, customers, and partners.

Deliverable: VAPT Certificate
Business Outcomes

Why Platform Teams Pick ISpectra for API Pentesting

Every deliverable is built for a measurable business outcome: new revenue, cleaner audit, lower insurance premium, or faster ransomware readiness.

OWASP API Top 10

Standards-first coverage that satisfies every serious buyer.

BOLA + BFLA Focus

The two flaws that drive most API breaches, hunted every engagement.

Schema Gap Map

OpenAPI and GraphQL gaps mapped so engineering can fix at the contract layer.

GraphQL and gRPC

Cost, alias, batch, depth, and gRPC reflection testing included.

Fixed Fee, Fixed Date

24-hour fixed-fee quote from a scoping call.

Free Retest

One full retest and reissued certificate included in every engagement.

Developer Fix Hints

Node, Go, Java, .NET, and Python remediation hints in the report.

Compliance Ready

Evidence satisfies SOC 2, ISO 27001, PCI DSS, HIPAA, and DPDP auditors.

Get Free Scoping Call
Industry Fit

Who Runs API Penetration Testing With Us

Regulated, high-stakes, multi-framework. Wherever trust is the product, we test.

Primary

B2B SaaS and FinTech

API-first platforms where partner and customer integrations demand proof.

Regulated

Open Banking and Health APIs

Open Banking, ABDM, HL7 FHIR, and insurance APIs tested under regulator rules.

Vendor Gate

Enterprise Procurement

Every enterprise RFP asks for API security testing evidence.

Due Diligence

M&A and PE

Pre-close API pentest plus post-integration rescan.

Industries We Serve

SaaS and Cloud

Multi-tenant APIs tested for tenant escape, BOLA, and multi-role authorisation.

SOC 2ISO 27001GDPRDPDP

Open Banking and FinTech

Open Banking, UPI, and wallet APIs tested against RBI and SEBI cyber frameworks.

RBISEBIPCI DSSDPDP

HealthTech

HL7 FHIR, ABDM, and payer APIs tested against HIPAA and HITRUST.

HIPAAHITRUSTSOC 2

E-Commerce

Product, cart, checkout, and payment APIs tested for coupon and pricing abuse.

PCI DSSSOC 2DPDP

Telco and IoT

Device and telemetry APIs tested for authentication, authorisation, and rate-limit abuse.

ISO 27001NIS 2DPDP

Public Sector

G2C and G2B APIs tested under CERT-In empanelled scope and MeitY guidelines.

CERT-InMeitYISO 27001
What Enterprise Clients Say

What Clients Say About Our API Security Testing

“ISpectra expertly guided us through every step of the SOC 2 certification process, turning complex regulatory requirements into practical, actionable steps. Their partnership-centric approach and responsiveness made all the difference. Achieving SOC 2 certification with their help has significantly enhanced our credibility and trustworthiness in the market.”
IZ
Irina Zakharchenko
Chief Operations and People Officer, DocsDNA
SOC 2 Certified
“ISpectra Technologies brought deep expertise in cybersecurity and DevSecOps to our projects, playing a crucial role in our EDR Tool implementations and SOC 2 compliance. Their solutions were tailored to our business and their proactive approach improved both our agility and security posture. ISpectra felt more like an extension of our team than an external vendor.”
SK
Sam K
CEO, Office Hub Tech LLC
SOC 2 + EDR Implementation
“Our Accounts Receivables have started to plummet since implementing RCMEdge. It provides electronic AR follow-up and identifies claims needing extra attention so we don't exhaust valuable resources on claims processing as normal. As a result, we're much more productive and cash flow favorable. Highly recommended!”
BR
Brian Reese
Director of Business Development, 24/7 Medical Billing Services
AR Significantly Reduced
“The VAPT report was presented in a structured and professional manner with clear categorization of vulnerabilities by severity. The depth of technical findings, along with practical remediation suggestions, provided our team with valuable insights. The clarity of documentation made it easy for our internal teams to translate recommendations into actionable steps.”
KV
Karthik Vadivel
Lead System Engineer, ICS Pvt Ltd
VAPT Security Strengthened
“The VAPT assessment was thorough and well-documented, providing a clear view of identified vulnerabilities with practical remediation guidance. The prioritization of risks and actionable recommendations enabled our teams to take corrective measures with clarity and confidence. We truly appreciate the expertise and professionalism your team brought to this engagement.”
KV
Kayden Vincent
Cybersecurity Lead, 247 Medical Billing Services
VAPT Risk Mitigated
“We have successfully secured our ISO 27001 certification through GLOCERT, and ISpectra Technologies was pivotal throughout. Your team's contribution was exceptional, not only in navigating the audit process but in the structural refinement of our internal policies and the practical application of ISMS best practices. The attention to detail ensured that our procedures are not just compliant, but operationally sound. We value the high standard of consultancy ISpectra has maintained and look forward to a continued professional association.”
CP
Chandan P
Business Analyst, Infocruise Solutions Private Limited
ISO 27001 Certified

Trusted by 500+ Global Enterprise Clients

Enterprise client
Partner logo
Enterprise partner
Global enterprise partner
Industry client
Technology partner
B2B client
Enterprise SaaS client
Global partner
IT staffing partner
Cloud partner
Digital transformation partner
Frequently Asked

API Security Testing FAQ

Answers to the questions buyers ask us most often during a api security testing evaluation: scope, pricing, methodology, tools, safety, reporting, retesting, and compliance mapping.

Have more questions?

Our lead testers can walk you through scope, pricing, SLAs, methodology, and compliance mapping in a 30-minute no-pressure call.

Response Time< 24h
Free Consultation30 min
Ask Our Team

API security testing is the process of finding authentication, authorisation, and business-logic flaws in your APIs before an attacker does. APIs now carry the majority of enterprise traffic, and OWASP API Security Top 10 flaws like BOLA, BFLA, and mass assignment drive most modern breaches. Scanners cannot find these - manual API penetration testing can.

Yes. Every modern API pentest we run covers REST (OpenAPI and raw), GraphQL (introspection, depth, alias, batch, cost), gRPC (reflection, transcoding) and SOAP (XXE, WS-Security). We also test mTLS-protected and service-mesh-protected APIs across Kubernetes and serverless runtimes.

Standard API penetration testing engagements take two to three weeks of testing plus one week of reporting. Multi-role, multi-tenant, and regulated-industry engagements can run four to six weeks. Retests are delivered within 10 business days of your remediation cutoff.

OWASP API Security Top 10 (2023), OWASP ASVS, OWASP WSTG, PTES, and CREST-aligned. Every finding is tagged to a specific OWASP API reference so your auditors, customers, and engineering teams can trust the rigor.

Burp Suite Professional with ISpectra extensions, Postman, Insomnia, GraphiQL, graphql-cop, grpcurl, Akto, mitmproxy, ffuf, sqlmap, and proprietary tooling. Tool selection follows the test narrative, never a vendor checklist.

Preferred but not required. A schema accelerates coverage and raises confidence. Without one we run surface discovery against a staging environment, map endpoints manually, and build an OpenAPI artefact as a deliverable of the engagement. Undocumented APIs often hide the worst findings.

No. We default to staging or QA. When production is in scope we use rate-limited, throttled, consent-scoped profiles inside agreed blackout windows. Over 450 engagements we have never caused a reportable service incident.

Executive summary, business-impact narrative, OWASP API Top 10 mapping, per-endpoint technical appendix with reproduction scripts, CVSS 3.1 scoring, schema gap map for OpenAPI or GraphQL, developer fix hints, and a signed VAPT certificate.

Yes. Our API security assessment report is written to satisfy SOC 2 CC7.4, ISO 27001 A.8.29, PCI DSS 6.2 and 11.4, HIPAA 164.308(a)(8), and the DPDP Act reasonable security safeguards test. RBI, SEBI, and CERT-In empanelled letters are available on request.

Single-service API engagements start at USD 4,200. Multi-role enterprise SaaS or platform engagements start at USD 9,800. Full annual retainers covering quarterly retest from USD 24,000. Fixed-fee quote within 24 hours of a scoping call.

Free B2B IT Consultation

Ready to
Protect Your Enterprise?

What Your Business Gets

  • Free api security testing scoping
  • Transparent fixed-fee pricing
  • Signed NDA & MSA samples
  • No-obligation quote
  • Free retest included
  • Compliance mapping baked in

No obligation · Fixed-fee quote in 24 hours · 100% confidential

Schedule a Call

Pick a time that works for you

Request Assessment

Our team responds within 24 hours

No spam. No obligations. We respond within 24 hours.

Encrypted & 100% confidential
API Security Testing · Core VAPT

Ready to Prove Your Stack with a Certified API Security Testing?

Stop guessing where you are exposed. Start running api security testing on a fixed fee, fixed date, and a signed certificate auditors accept. Free retest included.

500+
VAPT Engagements
24h
Fixed-Fee Quote
Free
Retest Included
4.9/5
Client CSAT
Book Free API Security Testing Scoping See How We Test