Ukrainian Federal Credit Union API integration (FDX & OpenBanking)

Deliverables checklist

• OpenAPI 3.1 specification covering accounts, transactions, statements, transfers, and alerts
• Protocol analysis report: auth chain, mobile certificate pinning notes, request signing, error taxonomy
• Runnable Python and Node.js source for login, account list, transaction history, statement export, and Zelle send
• FDX v6.5 schema mapping doc — every UFCU field annotated with the matching FDX field id
• Pytest / Jest fixtures, replay harness, and a Postman collection
• Compliance brief: CFPB Section 1033 obligations, NCUA member-data guidance, GLBA privacy notes

Data available for integration

Below is the inventory of structured data the app exposes through its server, derived from the published feature list and from comparable US credit union digital channels. Every row maps cleanly onto an FDX v6.5 resource.

Typical integration scenarios

1) Personal finance dashboard onboarding. A budgeting app (think a private label of Mint or Monarch) needs UFCU accounts to show up next to a member's other institutions. Business context: members migrating from spreadsheets. Data involved: account list, balance snapshot, two years of transaction history. OpenData mapping: fdx.accounts + fdx.transactions with consumer-permissioned consent under Section 1033.

2) Small-business accounting sync. A Ukrainian-American small business runs payroll and AP through QuickBooks and uses UFCU for primary deposits. Business context: nightly bank feed. Data involved: transaction export, statement PDF, RDC posted-amount confirmation. OpenData mapping: scheduled GET /transactions?since=... against a Section-1033-style endpoint, files dropped to the customer's accounting connector.

3) Mortgage origination pull. A non-bank mortgage lender requests 12-month statements and asset verification. Data involved: eStatement export, balance snapshot, savings history. OpenData mapping: a one-shot consumer-permissioned export that yields FDX asset evidence rather than scraped PDFs.

4) Cross-institution P2P reconciliation. A community organization runs Zelle disbursements out of a UFCU checking account and needs end-to-end status. Data involved: Zelle outbound transfer creation, status webhook, matching debit on transaction history. OpenData mapping: write-side endpoint plus read-side reconciliation to close the loop.

5) Member-side fraud alerting. A risk vendor wants near-real-time card and ACH activity to score anomalies. Data involved: transaction stream, alert preference management, balance delta. OpenData mapping: webhook subscription on the same envelope FDX defines for "events".

Technical implementation

Below are three representative snippets from a typical Ukrainian Federal Credit Union API integration drop. They are illustrative — in a real engagement we replace them with the exact request and response shapes captured during protocol analysis.

# 1) OAuth-style token exchange (Python)
import httpx, time

def exchange(member_username: str, member_password: str, device_id: str):
    r = httpx.post(
        'https://api.openfinance-lab.com/v1/ufcu/auth/login',
        json={
            'username': member_username,
            'password': member_password,
            'device_id': device_id,
            'biometric_token': None,    # set when Face ID / Touch ID re-auth is used
        },
        timeout=15.0,
    )
    r.raise_for_status()
    body = r.json()
    return {
        'access_token': body['access_token'],
        'refresh_token': body['refresh_token'],
        'expires_at': time.time() + body['expires_in'],
    }

// 2) Statement query (Node.js, FDX-shaped)
POST /v1/ufcu/statement
Content-Type: application/json
Authorization: Bearer <ACCESS_TOKEN>

{
  "account_id": "acct_chk_8821",
  "from_date": "2026-04-01",
  "to_date":   "2026-04-30",
  "format":    "json"        // or "csv" | "pdf"
}

// Response (truncated, FDX v6.5 mapping)
{
  "accountId": "acct_chk_8821",
  "transactions": [
    { "transactionId": "t_9912", "postedTimestamp": "2026-04-03T14:21Z",
      "amount": -42.18, "description": "Wegmans #312",
      "category": "FOOD_AND_DRINK", "memo": "debit card" },
    { "transactionId": "t_9913", "postedTimestamp": "2026-04-04T09:00Z",
      "amount": 1820.00, "description": "ACH Payroll",
      "category": "INCOME" }
  ],
  "page": { "next": "cursor_abc" }
}

# 3) Webhook for mobile remote deposit + Zelle status
POST /your-listener/ufcu-events
Content-Type: application/json
X-OFL-Signature: t=...,v1=...

{
  "event": "deposit.processing",
  "account_id": "acct_chk_8821",
  "deposit": {
    "deposit_id": "rdc_771",
    "amount": 250.00,
    "front_image_id": "img_a1",
    "back_image_id":  "img_a2",
    "submitted_at":   "2026-05-02T11:14:08Z",
    "status":         "PROCESSING"   # → POSTED | HELD | REJECTED
  }
}

# Errors follow Problem+JSON: {"type":"...","title":"...","detail":"...","status":4xx}

Compliance & privacy

Every Ukrainian Federal Credit Union integration we ship is designed around four overlapping US frameworks. Most importantly, the CFPB's Section 1033 Personal Financial Data Rights rule — finalized in October 2024 and effective January 17, 2025 — codifies a member's right to share their UFCU data, fee-free, with authorized third parties. Compliance dates roll in from April 2026 through April 2030 by institution size, and credit unions under $850 million in assets are exempt from the mandate but still benefit from voluntarily aligning to the same shape.

We layer in FDX (Financial Data Exchange) API v6.5 — recognized by the CFPB in January 2025 as a standard-setting body — so account, transaction, statement, and consent schemas line up with the spec already used by 114M+ live US open-banking connections. On top of that we follow NCUA member-data expectations, GLBA safeguards for nonpublic personal information, and FFIEC authentication guidance. For independent context on the 1033 rule, see the CFPB final rule page.

Data flow / architecture

A typical pipeline looks like this:

1. Client app or consent UI — member authorizes scope (accounts, transactions, RDC, Zelle) using OAuth 2.0 + PKCE.
2. Ingestion / API layer — our hosted endpoints (or your runnable source) handle the UFCU protocol, refresh tokens, and rate-limit retries.
3. Normalization — payloads are mapped to FDX v6.5 resources and stored in your warehouse, S3, or Postgres.
4. Analytics / API output — downstream BI, accounting, fraud, or member services consume the normalized objects, with full audit logs for every read.

About OpenFinance Lab

We are an independent technical studio focused on mobile-app protocol analysis and authorized API integration for finance, e-commerce, travel, and social platforms. Our engineers come out of US and EU banks, payment gateways, and infosec teams; we ship end-to-end integrations under NDA and under the regulatory regimes our clients operate in.

• Retail and credit-union digital banking, payment rails, and cross-border clearing
• OAuth flow analysis, certificate pinning, and request-signing for hardened mobile apps
• Custom Python / Node.js / Go SDKs and replayable test harnesses
• Full pipeline: protocol analysis → API build → validation → compliance brief
• Source-code delivery from $300 — runnable API source plus full documentation; pay after delivery upon satisfaction
• Pay-per-call API billing — connect to our hosted endpoints and pay only per call, with no upfront cost

Contact

Tell us the target app (already Ukrainian Federal Credit Union for this page) and the data scope you need. We respond within one business day.

Contact page

Engagement workflow

1. Scope confirmation — you list the UFCU data you need (accounts, transactions, RDC, Zelle, alerts).
2. Protocol analysis and OpenAPI design (2–5 business days).
3. Build and internal validation against fixtures and a sandbox member account (3–8 business days).
4. Documentation, sample code, FDX mapping doc, and Postman collection (1–2 business days).
5. Typical first delivery: 5–15 business days; certain Zelle write-side flows may take longer pending authorization paperwork.

FAQ

What do you need to start a Ukrainian FCU integration?

Which fields and endpoints are typically delivered?

How do you align with FDX and the CFPB 1033 open banking rule?

How long does delivery take and what does it cost?