OTP SZÉP Card — Interface Integration and Protocol Analysis Service

Standard Deliverables

• Protocol analysis report (authentication, session management, endpoints)
• OpenAPI / Swagger specifications and sample data
• runnable backend code (Node.js / Python) with auth and fetch logic
• Webhook / callback and retry mechanism implementation
• Automated test scripts, Postman collection and acceptance criteria
• Compliance guidance (data minimization, privacy, GDPR / LGPD guidelines)

Interface Example — Transaction Query (pseudo-code)

// Pseudo: fetch welfare transactions for a period
POST /api/v1/otp/transactions
Content-Type: application/json
Authorization: Bearer <ACCESS_TOKEN>

{
  "card_number": "1234-5678-9012-3456",
  "from_date": "2025-01-01",
  "to_date": "2025-10-31",
  "page": 1,
  "page_size": 50
}

Response 200 OK
{
  "status": "OK",
  "card": {"last4":"3456","balance":75430},
  "benefits":{
     "meal_credit":80.00,
     "food_credit":40.50
  },
  "updated_at":"2025-10-01T09:20:00Z"
}

// Issue a QR payment (example)
POST /api/v1/otp/payments/qr
{
  "merchant_id":"M_987",
  "amount":25.00,
  "currency":"BRL",
  "context":"meal"
}

Response: {"qr_code":"data:image/png;base64,...","expires_in":300}

Key Integration Scenarios

Batch balance syncing, welfare transaction details, merchant QR acceptance SDK, employee attendance punching, salary advances, and rewards redemption with reconciliation reporting.

API Integration Quick Guide

1. Confirm target scenarios (balance queries / transaction details / merchant lookup).
2. Protocol assessment (2–5 business days) covering authentication, callbacks, and signing types (OAuth2 / JWT / API Key / HMAC).
3. Develop and test: build runnable APIs, webhooks and SDKs (3–10 days, depending on complexity).
4. Deliver OpenAPI docs, deployment scripts and operational guidance.

Notes: We work strictly on client-authorized or public/partner APIs; if reverse engineering is required, we’ll confirm legal boundaries with the client and sign necessary agreements.

About Us

We are a tech studio focused on mobile app protocol analysis and authorization API integration. Our team has extensive experience in payments, banking and data compliance, delivering OpenData/OpenFinance interfaces with secure, auditable outcomes.

• Supports Android / iOS protocol recreation and API layer implementation
• Deliver runnable Node.js / Python services with SDKs
• Compliance-first: GDPR, local privacy laws, and security best practices
• Transparent pricing: starting at $300, with pay-after-delivery options

Contact

Ready to start? Please visit our contact page and submit target App package name and integration needs.

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Collaboration Process (Summary)

1. Submit target App name and requirements.
2. Feasibility and initial protocol assessment (2–4 business days).
3. Development and internal validation (3–10 business days).
4. Deliver source code, OpenAPI docs and test cases; implement changes within 5 business days if needed.