Vanquis App — OpenFinance Integration & Protocol Analysis

Compliant API implementations, protocol reverse-analysis and turnkey source code for card-management, statements, payments and webhooks.

Starting at $300
OpenData · OpenFinance · Protocol Analysis · Card APIs

Fast, compliant API integration for Vanquis credit-card services

We deliver ready-to-run API implementations and documentation for card account binding, transaction history, statement exports (PDF/CSV), secure tokenized auth, and webhook-driven event delivery — minimal effort from your side.

Card account and billing APIs — Securely fetch card balances, available credit, statements, pending and posted transactions, and billing cycles with pagination and filter support.
Authentication & token management — Implement OAuth2 / token refresh or app-signed tokens with short-lived access tokens, refresh flows, and best-practice key rotation.
Webhooks & realtime events — Reliable delivery of payment events, disputes, chargebacks and statement-ready notifications with retry/backoff and signature verification.
Compliance-first approach — Privacy-by-design, consent logging, secure data retention policies, and guidance for regulatory requirements (e.g., PCI, local data protection).
Get a Quote See Deliverables

What we deliver

Deliverables (standard)

  • OpenAPI (Swagger) spec for all endpoints
  • Protocol analysis report (auth chain, endpoints, rate limits)
  • Production-ready backend sample (Node.js / Python / Go)
  • Webhook consumer example and retry logic
  • Integration test suite & Postman collection
  • Security checklist: PCI-lite, consent logs, token handling

API example (pseudo)

# Example: fetch card statements (pseudo)
POST /api/v1/vanquis/statements
Content-Type: application/json
Authorization: Bearer <ACCESS_TOKEN>

{
  'card_id': 'VQ-XXXX-1234',
  'from_date': '2025-10-01',
  'to_date': '2025-10-31',
  'format': 'csv'
}

Response 200 {
  'status': 'OK',
  'download_url': 'https://files.example.com/vanquis/statement-2025-10.csv'
}

Security & reliability

All delivered code includes token encryption at rest, TLS enforcement, HMAC-signed webhooks, idempotency for critical endpoints and rate-limit handling. We provide guidance for PCI and local regulatory constraints.

API Integration Instructions

  1. Provide target App name (Vanquis) and the exact scope: e.g. statements, card control, transactions, webhooks.
  2. Share available credentials or sandbox access (if any). If none, we'll design a safe integration plan using protocol analysis and OpenData where permitted.
  3. Choose preferred delivery stack: Node.js / Python / Go + Docker. We provide SDKs.
  4. We run protocol analysis (2–5 business days), then deliver prototype APIs and test vectors.
  5. Final delivery: OpenAPI spec, source code, Postman collection, test scripts, and compliance notes.

Typical endpoints we implement: /auth/token, /cards/{id}, /transactions, /statements, /webhooks/subscribe, /webhooks/events.

Quick technical checklist we need from you

  • Primary integration goals (data pull, push, realtime events)
  • Any existing API keys, app tokens or test accounts
  • Allowed IPs / inbound webhook URL (or we provide a secure tunnelling option)
  • Compliance constraints (data retention, allowed fields, redaction rules)
  • Preferred language for sample code and deployment target

Why choose our studio

We are a specialist technical service studio focused on app interface integration and authorized API integration for fintech and payments. Our engineers have years of experience in mobile protocol analysis, OpenFinance implementations, and secure API delivery.

  • End-to-end: analysis → development → tests → docs → handover
  • Compliant implementations, privacy-first design
  • Cross-platform support: Android & iOS protocol behaviours
  • Transparent pricing and staged delivery (start $300)

Contact & next steps

Ready to proceed? Click the contact page to submit the App packageId (com.ie.vanquis.interact.shell) and your integration requirements. We reply with a scoped proposal and timeline.

Contact Us

Original App — Vanquis (collapsed) — full description

Below is the original app description you provided. It is included here for reference and will be kept collapsed by default.

Vanquis app — core capabilities (original text)
  • View your current balance and available spend
  • Check your latest transactions including pending transactions and payments
  • Set up and manage Direct Debits through the app
  • Make payments to your account using a debit card
  • View your pin number and your card details
  • Approve online spending
  • Update your address, phone numbers and email address
  • Report your card as Lost or Stolen
  • View and download monthly statements
  • Check eligibility for offers including Balance Transfers and Credit Limit Increases

Download and register in minutes using a UK mobile number and your Vanquis card with date of birth.

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