Curve

Curve Pay — App Interface Integration & OpenFinance Delivery

Integration, protocol analysis and compliant API implementations for Curve Pay (com.imaginecurve.curve.prd)

Starting from $300

OpenData · OpenFinance · Protocol Analysis · Wallet Integration

Turn Curve Pay capabilities into production-ready APIs for your platform

We provide secure, compliant implementations for wallet aggregation, transaction history APIs, card tokenization sync, Apple/Google Wallet guidance, and protocol-level analysis (reverse engineering where required) to deliver working source code and documentation.

Unified Transaction API — Normalised transaction feeds (JSON/CSV/Excel) with filters (date, merchant, card, tag), pagination, and export-ready formatting for accounting or analytics.

Card & Pay Apps Integration — Guidance and code for safely synchronising tokenized cards across Google Wallet / Apple Wallet / Samsung Pay, and for managing card lock/unlock and rewards metadata.

Go Back in Time & Smart Rules Support — Expose action endpoints to emulate Curve features (switching charge rails, retroactive allocations) while preserving audit trails and limits.

Compliance & Security — PCI, GDPR, PSD2/OpenBanking mapping, consent records, and recommendations for secure token storage and certificate pinning bypass strategies where applicable during testing (we use lawful, consented methods).

Request a Quote See Deliverables

What we deliver

Standard Package

API specification (OpenAPI 3.0) and SDK snippets (Node/Python)
Protocol analysis report (auth flows, token lifecycle, wallet sync)
Working proxy/service to fetch and normalise transactions
Security checklist (PCI, GDPR, consent capture)

Example: Transaction / Statement API (pseudo)

# POST /api/v1/curve/transactions
Content-Type: application/json
Authorization: Bearer <INTEGRATION_TOKEN>

{
  "user_id": "curve_user_123",
  "from": "2025-01-01",
  "to": "2025-01-31",
  "currency": "GBP",
  "page": 1,
  "page_size": 200
}

Response 200 OK
{
  "status": "ok",
  "meta": {"total": 124, "page": 1, "page_size": 200},
  "transactions": [
    {
      "id": "tx_abc123",
      "date": "2025-01-07T08:12:00Z",
      "amount": -23.50,
      "currency": "GBP",
      "merchant": "Cafe Central",
      "card_mask": "**** 1234",
      "category": "Food",
      "source": "curve:card_xxx",
      "cashback": 0.47
    }
  ]
}

Advanced Add-ons

Real-time webhooks & push for transactions, refunds, chargebacks
Apple/Google Wallet token sync & provisioning guidance
Reconciliation scripts & Excel export templates
Copy-trading & multi-card routing emulation (for marketplaces)

Core Benefits

Ready-to-run API adapters that minimise integration time
Compliant methods — we map to PSD2/OpenBanking where applicable
Cross-platform support: Android & iOS, Apple Wallet & Google Wallet
Source code delivery + test plans + OpenAPI documentation

Typical Use Cases

Travel apps, expense management, merchant platforms, accounting systems, loyalty / cashback managers, and fintechs that need consolidated card data and spend controls.

API Integration Instructions (high level)

Provide target app identifier: com.imaginecurve.curve.prd and list desired features (transactions, card sync, wallet provisioning).
Choose access model: (A) Customer-provided consent + credentials; (B) OpenData / public-feeds (where available); (C) Proxy service with user consent. We do not perform unauthorised access.
Authentication: we implement OAuth2-like token exchange for session tokens; for Wallet provisioning we follow platform tokenisation flows and advise on secure element / token vault usage.
Data mapping: we normalise fields (id, date, amount, currency, merchant, category, card_mask, source, metadata) and provide OpenAPI definitions for each endpoint.
Webhooks & scaling: include retry/backoff, signature verification (HMAC), and rate-limit policies. We provide a test harness to validate webhook flows.
Compliance: we deliver consent capture records, DPIA recommendations (GDPR), and PCI-DSS guidance for card data touchpoints.
Delivery: code repository (SSH), deployment instructions (Docker / Kubernetes), automated tests, and Postman collection / OpenAPI UI.

About Our Studio

We are a technical service studio specialising in OpenData, OpenFinance and authorized API integrations. Our team blends mobile app, payments and fintech engineering experience to deliver protocol analysis, interface refactoring, secure SDKs, and complete documentation.

Expertise: card tokenisation, wallet provisioning, PSD2/OpenBanking mappings, Apple/Google Wallet
Deliverables: OpenAPI specs, integration code (Node/Python/Go), test suites, compliance notes
Process: Share app name + requirements → protocol analysis → build → verify → deliver

Contact & Next Steps

To get started, click below to visit our contact page and submit your integration brief (target app, desired endpoints, environment access).

Pricing starts at $300. We can deliver a working prototype and OpenAPI documentation for review prior to final acceptance.

Engagement & Timeline

Requirement review & proposal (1–3 business days)
Protocol analysis & design (2–6 business days)
Implementation & testing (3–12 business days — depends on complexity)
Delivery: source code, OpenAPI, test plan, and deployment notes (1–2 business days)

Common Questions

Do you perform reverse engineering? — We perform lawful protocol analysis and reverse engineering only with client authorization and for the purpose of building interoperable, compliant integrations. We never attempt unauthorised access.

Which platforms are supported? — Android & iOS app flows, server-side adapters (Node/Python/Go), Apple Wallet & Google Wallet provisioning guidance.

Original App — Curve Pay (collapsed)

Below is the original app description (for integration context):

Curve Pay - your digital wallet & payment app with Google Wallet, Apple Wallet, Apple Pay and Google Pay integration. One travel card that combines all your debit and credit card options & maximises your cashback worldwide. Pay by phone globally & avoid ATM & FX fees.

Key features:
- Combine multiple cards into one travel card and digital wallet
- Integrations with Apple/Google Wallet, Google Pay, Samsung Pay, Garmin Pay
- Go Back in TimeⓇ to move payments between cards
- Smart Rules and Anti-embarrassment mode to improve payment success
- Cashback tracking, FX rates and global ATM allowance depending on plan
- Plans: Free, Curve Pay X, Pro, Pro+ with escalating limits and benefits
- Compatible with Mastercard, Visa, Diners Club and many bank-issued cards

Terms and privacy at https://www.curve.com/en-gb/legal/