Connect My ACFCU Mobile balances, transactions, and transfers into accounting, ERP, and risk stacks
My ACFCU Mobile is the member-facing channel for Appalachian Community Federal Credit Union, a Tennessee-headquartered community credit union serving members across the Tri-Cities and broader Appalachian region. The app exposes the day-to-day data that small businesses, bookkeepers, and personal-finance tools most often want to ingest: real-time balances, posted and pending transactions, transfer history, scheduled bill-pay items, and remote check-deposit records. We turn those member-side flows into clean, documented APIs that downstream systems can consume without screen-scraping risk.
What we deliver
Deliverables checklist
- OpenAPI 3.1 / Swagger specification with example payloads
- Protocol & auth flow report (login, MFA prompt, session refresh, logout)
- Runnable Python and Node.js source for login, balance, transaction history, and transfer endpoints
- FDX 6.x mapping table and OFX 2.x exporter
- Postman collection and pytest/Jest test suite with replayable fixtures
- Compliance memo covering Reg E, GLBA, NCUA expectations, and Section 1033 readiness
Recent context (2024-2026)
In 2024 the CFPB finalized the Section 1033 Personal Financial Data Rights rule, locking in a phased compliance schedule that begins April 1 2026 for the largest data providers and extends through 2030 for smaller credit unions like ACFCU. In 2025 the Bureau opened a reconsideration process and an Advance Notice of Proposed Rulemaking, so the standard is moving but the FDX-based data model that the industry has converged on remains the safest target for new builds. We design APIs against that target so a future regulatory pivot is incremental.
Data available for integration
The table below is derived from the My ACFCU Mobile in-app surfaces (balances, activity, transfers, bill pay, ATM/branch locator, RDC) combined with the FDX data classes that US open-banking aggregators use today. Granularity values reflect what is realistically observable from the mobile session, not internal core fields.
| Data type | Source screen / feature | Granularity | Typical downstream use |
|---|---|---|---|
| Account list & balance | "Accounts" home tab | Per share / loan, current + available, daily refresh | Cash-position dashboards, low-balance alerts |
| Transaction history | "Account Activity" view | Per transaction: amount, posting date, descriptor, type | Bookkeeping sync, expense categorization, AML signals |
| Internal transfers | "Transfer Funds" flow | Source, target, amount, scheduled or immediate | Treasury automation, sweep rules |
| Bill-pay payees & payments | "Pay Bills" module | Payee, last payment, status, confirmation # | AP automation, vendor reconciliation |
| Mobile deposit (RDC) | "Deposit Check" capture | Item ID, amount, hold release date, status | SMB cash-flow forecasting, audit trail |
| Branch & ATM locator | "Locations" tab | Address, hours, services, geo coordinates | Card-program issuer maps, fee-free network tools |
| Member profile | Sign-in & settings | Masked member #, contact, MFA channels | Identity binding, fraud-prevention signals |
Typical integration scenarios
1. SMB bookkeeping sync (QuickBooks Online / Xero)
Context: an Appalachian-region contractor or restaurant runs operating funds through ACFCU share-draft accounts and wants daily, authoritative transaction sync into QuickBooks Online or Xero. Data involved: account list, transaction history with merchant descriptor, mobile-deposit clearing status. OpenBanking mapping: FDX accounts + transactions endpoints exported nightly as OFX 2.x and pushed through the QBO bank-feed API. Net result: bookkeeper stops manually downloading PDF statements.
2. Personal-finance aggregation
Context: members already use apps like Monarch, Copilot, or YNAB and want ACFCU balances in the same dashboard as their other institutions. Data involved: balances, last-30-day transactions, scheduled bill-pay items. OpenBanking mapping: a Section-1033-style consent screen, scoped read-only token, and an FDX-shaped JSON feed that aggregators can ingest without screen-scraping the credit union's online banking portal.
3. Loan-servicing & payment automation
Context: ACFCU offers auto, personal, and mortgage products; members and downstream servicers want programmatic visibility into next payment due, principal/interest split, and payoff quote. Data involved: loan account snapshot, transfer/payment posting status. OpenBanking mapping: FDX loan account class, plus a webhook callback when a payment posts so a third-party servicer can mark its own ledger.
4. Compliance & risk monitoring
Context: a CPA firm or a compliance team needs read-only evidence of cash movement for AML, SAR triage, or audit. Data involved: full transaction history with ACH descriptors, transfer trail, and member-profile MFA channel. OpenBanking mapping: scoped transactions:read token, immutable export hashed with the data-pull timestamp, suitable as evidence in a Reg E or BSA review.
5. Treasury & sweep automation for small employers
Context: a small employer using ACFCU for payroll funding wants to keep operating balance pinned within a target band, sweeping excess to a money-market share. Data involved: balance snapshots, internal-transfer API, scheduled jobs. OpenBanking mapping: balance polling on a 15-minute cadence, plus a guarded transfer API call with idempotency keys and audit logging.
Technical implementation
Below are three representative endpoints from a typical ACFCU integration we ship. They follow FDX-style naming so the same client code can target other US credit unions or banks with minor schema swaps.
Member login & MFA
POST /api/v1/acfcu/session
Content-Type: application/json
{
"member_id": "***1234",
"credential": "<encrypted>",
"device_fingerprint": "a8f3...c2",
"mfa_channel": "sms"
}
200 OK
{
"session_id": "sess_5f3a...",
"mfa_required": true,
"mfa_token": "mfa_8c2e...",
"expires_in": 900
}
POST /api/v1/acfcu/session/mfa
{ "mfa_token": "mfa_8c2e...", "otp": "483920" }
→ { "access_token": "...", "refresh_token": "...", "expires_in": 1800 }
Transaction history (FDX-aligned)
GET /api/v1/acfcu/accounts/{accountId}/transactions
?fromDate=2026-04-01&toDate=2026-04-30&pageSize=200
Authorization: Bearer <ACCESS_TOKEN>
200 OK
{
"transactions": [
{
"transactionId": "txn_77c1...",
"postedTimestamp": "2026-04-14T13:02:11Z",
"amount": -42.18,
"currency": "USD",
"description": "WEIGEL'S #34 KNOXVILLE TN",
"category": "FUEL",
"status": "POSTED",
"type": "DEBIT_CARD"
}
],
"page": { "next": "cursor_b2..." }
}
Internal transfer with idempotency
POST /api/v1/acfcu/transfers
Authorization: Bearer <ACCESS_TOKEN>
Idempotency-Key: 8d3c-4a1f-9b22
{
"fromAccountId": "acct_share_01",
"toAccountId": "acct_mm_07",
"amount": 1500.00,
"currency": "USD",
"memo": "Monthly sweep"
}
202 Accepted
{ "transferId": "trf_3a91...", "status": "SCHEDULED" }
// Error envelope
4xx
{ "error": { "code": "INSUFFICIENT_FUNDS",
"message": "Available balance below requested amount",
"traceId": "trc_..." } }
Compliance & privacy
Regulatory anchors
US credit-union integrations sit at the intersection of several regimes. Our default deliverable cites the relevant rule for every flow we expose: CFPB Personal Financial Data Rights (12 CFR Part 1033) for member-permissioned data sharing, NCUA guidance on third-party arrangements, Regulation E for electronic fund transfers and error resolution, and GLBA Safeguards for the protection of nonpublic personal information. For the underlying interchange and message format, we align to the Financial Data Exchange (FDX) 6.x data model.
Practical guardrails
- Member consent capture and revocation log retained 7 years
- Least-privilege tokens scoped to
balance:read,transactions:read,transfers:writeas needed - No persistent storage of plaintext credentials; MFA tokens are short-lived and channel-bound
- Field-level data minimization: SSN, full account numbers, and DOB are masked unless explicitly authorized
- Audit log entries hashed with pull timestamp, suitable for Reg E error-resolution evidence
Data flow / architecture
A typical deployment uses four nodes: (1) Mobile / web client → (2) Authorization edge (OAuth + MFA, consent capture) → (3) Protocol adapter (mirrors the My ACFCU Mobile session, normalises responses to FDX) → (4) Storage & egress layer (event log, OFX/CSV exports, downstream webhooks). Read paths fan out from node 3 directly to consumer apps; write paths (transfers, bill pay) pass through a guarded queue with idempotency keys and a human-overridable approval hook for amounts above a configurable threshold.
Market positioning & user profile
Appalachian Community Federal Credit Union is a community-charter institution headquartered in Gray, Tennessee, with branches across the Tri-Cities (Johnson City, Kingsport, Bristol) and eastern Tennessee / southwestern Virginia. The My ACFCU Mobile user base skews toward retail members and local small businesses — household banking, auto and personal loans, mortgages, and SMB share-draft accounts. Both Android and iOS are first-class platforms, and the app is the credit union's primary self-service channel outside of the website and branch network. Buyers of our integration work tend to be regional CPA firms, SMB SaaS vendors, personal-finance aggregators, and compliance teams supporting members in the same geography.
Screenshots
Tap any thumbnail to enlarge. These are the official Google Play screenshots of My ACFCU Mobile.
Similar apps & integration landscape
The credit-union mobile-app ecosystem is broad and fragmented; most US institutions ship a member app with overlapping primitives (balances, transactions, transfers, bill pay, RDC). Teams that integrate one credit union frequently end up integrating several, so we keep the data model portable across them.
- A+ Federal Credit Union — Texas-based member app rated a top mobile-banking experience in 2025; same balance, transfer, and mobile-deposit primitives, often paired with cross-institution transaction exports.
- Alliant Credit Union — National digital-first credit union; users frequently want unified transaction feeds that cover Alliant alongside a smaller community CU like ACFCU.
- Eastman Credit Union — Headquartered in Kingsport, TN, in the same Tri-Cities footprint as ACFCU; SMB clients commonly hold accounts at both and need a single FDX-shaped feed.
- Delta Community Credit Union — Georgia's largest credit union with high-rated iOS and Android apps; surfaces a similar transactions + bill-pay shape that maps cleanly onto FDX.
- Redstone Federal Credit Union — Alabama-based, frequently appearing alongside ACFCU in regional small-business banking stacks.
- ESL Federal Credit Union — Western New York CU with mature digital channels; relevant for aggregators that need consistent transaction descriptors across regions.
- Wright-Patt Credit Union — Ohio-based, large member base; useful comparison point for transfer and RDC flow ergonomics.
- Keesler Federal Credit Union — 24-hour account access for balances, transaction history, and cleared-check images; the cleared-check pattern is something we frequently re-implement as a structured RDC export.
- Credit Union of America — View balances, transactions, transfers, bill pay, mobile deposit, and debit-card controls — a near 1-to-1 feature parity with My ACFCU Mobile.
- Florida Credit Union Mobile Banking — Balances, transaction history, transfers, loan payments; another typical target for unified-feed buyers.
About us
We are an independent technical studio focused on mobile-app protocol analysis and open-finance API integration. Our engineers come out of US banking, credit-union service organisations (CUSOs), aggregator platforms, and cloud infrastructure. We have shipped FDX-shaped feeds, OFX bridges, and OAuth/MFA passthrough work for community institutions and the SaaS vendors that serve them.
- Member-authorized integrations for community banks and credit unions
- FDX 6.x mapping, OFX 2.x exporters, and aggregator bridges (Plaid, MX, Finicity)
- Python, Node.js, Go SDKs with replayable test harnesses
- End-to-end pipeline: protocol analysis → build → validation → compliance memo
- Source code delivery from $300 — runnable source plus full documentation; pay after delivery upon satisfaction.
- Pay-per-call hosted API — usage-based pricing for teams that do not want to host the integration themselves.
Contact
For quotes, scoping, or to submit your target app and integration requirements, open our contact page. Include the data classes you need (balance, transactions, transfers, bill pay, RDC), the deployment model (self-hosted source or pay-per-call), and any compliance constraints.
Engagement workflow
- Scope confirmation: list the data classes and write/read flows you need (e.g. login + balance + 30-day transactions vs. full transfer authority).
- Protocol analysis and API design (2-5 business days), including FDX mapping draft.
- Build and internal validation against replayable fixtures (3-8 business days).
- Docs, samples, Postman collection, and test cases (1-2 business days).
- Typical first delivery: 5-12 business days. Transfer and bill-pay flows add 1-2 weeks due to Reg E and OFAC checks.
FAQ
What do you need from me to start a My ACFCU Mobile integration?
Does ACFCU publish an official developer API?
How long does a first delivery take?
How do you stay compliant with Section 1033 and Reg E?
📱 Original app overview (appendix)
My ACFCU Mobile is the official member app of Appalachian Community Federal Credit Union, a Tennessee-headquartered community credit union. The app is positioned as members' mobile access channel for everyday account maintenance from any location.
Per the publisher's own description, the app lets members:
- Check account balances across share-savings, share-draft, money-market, and loan products.
- View account activity, including posted and pending transactions.
- Transfer funds between accounts on the same membership.
- Pay bills through the integrated bill-pay module.
- Find branch and ATM locations across the credit union's footprint.
The publisher notes that when members use My ACFCU Mobile, their information is protected at the same level as on the desktop online-banking channel: account information is not stored on the device, and encryption is used to protect data in transit. The intent of the app is straightforward member access "anytime, anywhere", and it is distributed on both Google Play and the Apple App Store under the package id com.appalachiancommunityfcu.appalachiancommunityfcu.
This page is an independent technical-integration overview written by OpenFinance Lab; it is not produced by or endorsed by Appalachian Community Federal Credit Union. Any integration work we deliver is performed only under explicit member authorization or via documented public/authorized data-access channels.