PayPal Integration & Open Finance API Solutions

Compliance-focused protocol analysis, authorization access, payment and reconciliation APIs. Runnable source code and documentation provided. Starting at $300.
Starting at $300
OpenData · OpenFinance · Protocol Analysis · PayPal Integration

Integrate PayPal's payments, transfers, savings, and cashback capabilities securely into your backend

We provide protocol analysis and interface refactoring services based on open/authorized channels: login authorization (OAuth / Token), transaction flow synchronization, Pay in 4 / installments, savings and earnings accounts integration, refunds and dispute handling interfaces. All deliverables adhere to privacy and compliance best practices.

Payments & Transfers Sync — Real-time or scheduled retrieval of transactions, status callbacks, payment receipts and refunds synchronization, supports multi-currency and cross-border transaction fields alignment.
Authorization & Account Binding — Full OAuth2 authorization flow, Token refresh, and secure session management (including KYC/AML considerations).
Reconciliation & Reporting — Automated reconciliation engine, Excel/CSV/JSON exports, tax and fee breakdowns, and anomaly alerting strategies.
Request a Quote View Deliverables

Our Deliverables & Examples

Standard Deliverables

  • OpenAPI / Swagger interface specifications
  • Protocol and authorization flow reports (including session management, token refresh, signing)
  • Runnable back-end code (Node.js / Python / Go) with deployment notes
  • Automated test scripts and API test suites
  • Compliance guidance (data retention, privacy, KYC/AML considerations)

Sample: Retrieve Transaction Statements (pseudo-code)

# Example: Query PayPal account transactions
POST /api/v1/paypal/transactions
Content-Type: application/json
Authorization: Bearer <ACCESS_TOKEN>

{
  "merchant_account": "merchant@example.com",
  "from_date": "2025-10-01",
  "to_date": "2025-10-31",
  "status": "ALL",
  "currency": "USD",
  "page": 1,
  "page_size": 200
}

Response: {
  "status": "OK",
  "transactions": [
    { "id":"PAY-12345", "time":"2025-10-05T12:30:00Z", "type":"SALE", "amount":49.99, "currency":"USD", "fee":1.52, "net":48.47, "payer_email":"buyer@domain.com", "status":"COMPLETED" }
  ],
  "cursor": "eyJwYWdlIjox" 
}

Key Integration Scenarios

Login & authorization (OAuth / JWT), payment initiation & async callbacks, merchant card issuance integration, refunds and settlement processes, and multi-region rate calculation and settlement rules.

API Integration Quick Start

  1. Define target features and scenarios (payments / card issuance / settlements / reconciliation).
  2. Acquire or generate test credentials (merchant ID, API keys, test URLs, callback URLs).
  3. Protocol analysis: identify authorization flow (OAuth/JWT/signing) and key message fields, with interface definitions.
  4. Development: deliver runnable services with authentication, retries, idempotency, reconciliation and export features.
  5. Validation & Deployment: provide Postman collections, OpenAPI docs and automated tests.

Common credentials: merchant ID, API keys, certificates (if any), test cards/accounts, callback whitelists.

Security & Privacy

All integrations are based on client authorization or publicly available APIs. We provide data minimization guidance, audit logging, and privacy compliance notes, with NDA options and security assessments as needed.

About Us

We are a studio focusing on mobile app protocol analysis and compliant API integrations. Our team has extensive experience in payments, banking and security, delivering end-to-end API solutions from protocol analysis to production deployment.

  • Supports Android / iOS integration and SDK packaging
  • Runnable source code, OpenAPI docs, and automated tests
  • Compliance-first: KYC/AML, privacy and data minimization guidance
  • Transparent pricing: starting at $300, with pay-after-delivery options

Contact

To start, submit the target app name and requirements via our contact page for a quick assessment and quote.

View Contact & Submit

📱 PayPal Official App Features (fold-out) — English
PayPal is a leading online payments platform, supporting personal and merchant payments, cross-border transfers, crypto purchases, and savings/investment products. Key features include:
  • Send and receive funds: transfers across 120+ countries, P2P and merchant payments
  • Cashback and promotions: manage offers, rewards and points in-app
  • PayPal Debit Card and withdrawals: link to bank accounts and physical/virtual cards
  • Crypto trading and holdings: BTC/ETH etc. (subject to regional compliance)
  • Pay in 4: installment payments and related transaction data
  • PayPal Savings: savings accounts and yields, with rate information
  • Disputes and refunds: dispute workflow, evidence upload and status callbacks
  • KYC and compliance: identity verification, restrictions and regional rules

Note: The above is for technical analysis and modeling; we only perform integrations with client authorization or public APIs, and strictly avoid unauthorised data access. When necessary, we use compliant protocol analysis and data extraction approaches to enable enterprise-grade integration, always under proper authorization.