A regulated fintech buyer should commission application and API VAPT from its actual regulatory, product and architecture context—not from a generic statement that “RBI requires a pentest.” RBI directions differ by regulated entity, activity and effective date, and the organisation’s compliance or legal function must determine what applies.
The technical engagement should then test the systems and workflows that can expose customer information, change financial state, control privileged access or affect the security of regulated services. The buyer must reconcile mobile and web channels, APIs, gateways, service identities, third parties and operational controls before the provider starts.
Confirm the applicable regulatory basis
Record the regulated entity type, licensed or outsourced activity, applicable RBI directions, internal policy, customer commitments and assessment owner. Use current official publications and documented legal or compliance interpretation.
A vendor proposal should not collapse banks, NBFCs, payment system operators and technology service providers into one requirement set. The technical scope follows the buyer’s validated obligations and risk decisions.
- Entity and regulated activity.
- Applicable direction and effective date.
- Compliance and legal owner.
- Audit or supervisory evidence purpose.
Define the business service boundary
Name the product, channels, customer populations, money flows, data classes and operational dependencies being assessed. Identify which component authoritatively approves or records each high-impact action.
Include systems that can affect service security even if they do not directly store regulated data. Identity, gateway, secrets, administration, fraud and support platforms may hold decisive authority.
- Web and mobile channels.
- APIs and backend services.
- Administrative and support systems.
- Identity, fraud and security dependencies.
Inventory every API and trust path
Build an operation-level inventory for public, partner, mobile, web, internal and service APIs, including versions, callbacks, webhooks, files, queues and real-time channels.
For each path, record authentication, caller, tenant or organisation context, protected object, rate controls and final system of record. Gateway inventory alone may omit direct or legacy routes.
- Methods, paths and GraphQL operations.
- Partner and service endpoints.
- Callback and webhook destinations.
- Deprecated, alternate and direct-origin routes.
Map customer and privileged identities
Provide representative customers, merchants, operators, support users, administrators, partners and workload identities. Include states such as pending, suspended, closed and recently changed privilege where safe.
Test server-side authorization across role, object, account, merchant and organisation boundaries. A permitted UI or gateway route does not prove the backend enforces the same decision.
- Retail and business users.
- Merchant and partner roles.
- Operations, support and administrators.
- Services, schedulers and integration credentials.
Model complete financial workflows
List applicable onboarding, beneficiary, transfer, payment, collection, refund, reversal, settlement, payout, mandate and dispute journeys. Define safe amounts, instruments and counterparties.
Test state, amount, currency, ownership, replay, idempotency, concurrency and callback binding. Evidence should follow the transaction to the authoritative ledger or final business record without creating uncontrolled financial impact.
- Initiation, approval and completion.
- Limits and step-up controls.
- Retry, reversal and reconciliation.
- Asynchronous provider confirmation.
Include onboarding and account lifecycle abuse
Where in scope, examine registration, KYC handoff, device binding, account recovery, contact change, beneficiary creation and dormant or blocked account behaviour. Coordinate with fraud and compliance controls rather than assuming VAPT replaces them.
The tester should distinguish a technical bypass from policy interpretation and should not process real identities beyond written authority. Use designated test profiles and controlled outcomes.
- Registration and verification boundaries.
- Recovery and contact changes.
- Device and session lifecycle.
- Suspension, closure and reactivation.
Verify mobile, browser and backend coverage
Confirm whether mobile binaries, browser applications, APIs, backend authorization and cloud configuration are all included or separately owned. Cross-channel workflows can expose inconsistent controls.
- Android and iOS builds.
- Web client and browser controls.
- Direct API invocation.
- Shared backend and cloud dependencies.
Reconcile third parties and outsourcing
Identify payment networks, aggregators, KYC services, messaging providers, cloud services, fintech partners and outsourced operations that participate in the tested flow.
Obtain required permissions and define responsibility for findings at each boundary. A provider must not test a third-party asset merely because the buyer’s application sends traffic to it.
- Contractual testing rights.
- Shared-responsibility boundaries.
- Subcontractors and data locations.
- Escalation between organisations.
Check tester competence and independence
Review the assigned team’s application, API, mobile, cloud and financial-workflow experience, not only the company brochure. Ask how technical review, severity calibration and false-positive control work.
Document conflicts, previous implementation roles and subcontractors. Independence should fit the regulatory and assurance purpose while retaining access to product context needed for meaningful testing.
- Named skills and relevant experience.
- Method and quality review.
- Conflict and subcontractor disclosure.
- Protected communication and reporting.
Create enforceable rules of engagement
Written authority must identify targets, environments, dates, source addresses, test identities, financial limits, prohibited actions, data handling, operations contacts and stop authority.
For production work, define real-time monitoring, rate ceilings, test markers, reconciliation and recovery. An urgent finding or unexpected customer impact should activate a rehearsed path, not an improvised email chain.
- Target and technique authority.
- Transaction and rate limits.
- Monitoring and incident coordination.
- Critical-finding and stop procedures.
Specify evidence and data protection
Decide how requests, tokens, records, screenshots, device artefacts and reports are encrypted, transferred, accessed, retained and destroyed. Avoid collecting customer data when synthetic or designated test data proves the issue.
The final report should redact secrets while keeping reproduction possible for authorised engineers. Track copies and recipients because the assessment material can become a concentrated map of the service.
- Approved evidence repository.
- Least-privilege recipients.
- Redaction and secret rotation.
- Retention and verified deletion.
Require coverage, findings and limitations
The provider should deliver a matrix of tested builds, hosts, APIs, roles, workflows and trust boundaries together with exclusions, inaccessible paths and production restrictions.
Each finding needs prerequisites, controlled proof, affected authority or data, business impact, severity rationale and remediation direction. A count of endpoints or tools is not coverage evidence.
- Release and environment baseline.
- Identity-operation-object coverage.
- Financial workflow coverage.
- Explicit sampling and residual uncertainty.
Plan remediation and independent retesting
Agree ownership, response expectations, risk acceptance and the retest window before testing begins. Material findings may require root-cause review across shared services and alternate routes.
Retest the deployed correction using the original proof and representative variants. Preserve original and retest evidence and state fixed, partial, not fixed or cannot verify for every item.
- Confirm the corrected application and API release.
- Repeat the safe proof within financial limits.
- Test related identities and operations.
- Issue traceable closure and remaining-risk evidence.
Use the official RBI Master Direction on Information Technology Governance, Risk, Controls and Assurance Practices, applicable official RBI directions for the entity and service, and NIST SP 800-115 for technical-assessment planning. The buyer’s compliance and legal owners should determine applicability; the VAPT provider should not claim that its report alone establishes RBI compliance.
Commission the test from the regulated service inward
A defensible fintech assessment begins with the entity, service and authoritative money flows, then follows their identities, APIs, integrations and operational dependencies into technical tests.
WIMD structures application and API VAPT around safe financial-workflow evidence, explicit regulatory boundaries, protected reporting, accountable remediation and independent retesting.