TruGrocer FCU API integration & OpenBanking services

1. Member authentication & session mirror

We reproduce the authorization flow used by the TruGrocer FCU mobile app — username/password, out-of-band verification, device fingerprint — and expose it behind an OAuth-style token endpoint. Concrete use: let a wealth tool onboard a member in under 60 seconds without asking them to screen-scrape their login.

2. Share and checking balance sync

A /accounts endpoint returns each sub-account with available_balance, current_balance, account_type (share, draft, loan, card), and apr/apy fields. Concrete use: feed a household cash-flow dashboard that refreshes every 15 minutes.

3. Transaction history & statement export

Paginated /transactions and /statements endpoints deliver posted activity with posted_at, amount, merchant_name, mcc, ach_company_id, and category. Concrete use: import 24 months of history into QuickBooks Online or Xero for a grocery store owner reconciling business spend.

4. Bill pay & P2P transfer events

Structured events for scheduled, posted, and returned bill payments plus member-to-member transfers. Concrete use: a property management platform confirming rent receipt from a TruGrocer FCU member without waiting for ACH return windows.

5. Mobile check deposit lifecycle

Webhook events from deposit.submitted through deposit.funds_available, with hold reasons and funds-availability dates. Concrete use: payroll tools that confirm when a pay stub has actually cleared for the member rather than when it was submitted.

6. Digital wallet & card-control signals

Token provisioning status for Apple Pay / Google Pay / Samsung Pay, plus card freeze/unfreeze hooks. Concrete use: a fraud-prevention tool that auto-freezes a TruGrocer debit card on suspected compromise and logs the wallet-token deprovisioning event.

A. Small-business bookkeeping for grocery franchise owners

Business context: a grocery store owner banks with TruGrocer FCU for deposits and uses QuickBooks for bookkeeping. Data/API: /accounts and paginated /transactions pulled nightly, plus mobile check deposit webhooks. OpenData mapping: this is a textbook FDX Accounts + Transactions read-only scope, with refresh_token renewed every 90 days to match the CFPB 1033 reauthorization cadence.

B. Consumer budgeting & savings app onboarding

Business context: a US budgeting app wants to let TruGrocer FCU members link their accounts in-app. Data/API: OAuth authorization to /authorize, then /accounts, /transactions, and /balances. OpenData mapping: aligns with Plaid's open finance flows and FDX consent receipts, so the user sees a durable list of which app has access to what and can revoke it.

C. Payroll verification for grocery industry employers

Business context: a HR/payroll vendor needs to confirm that a direct deposit actually credited the employee's TruGrocer FCU account before closing the pay run. Data/API: filtered /transactions?type=ach_credit&company_id=... with a webhook on the matching credit. OpenData mapping: fits the FDX Payroll and Direct Deposit Switch working groups — structured, event-driven, and member-permissioned.

D. Lending pre-approval & income verification

Business context: an auto-loan or mortgage platform wants 24 months of income and balance history for a TruGrocer FCU member. Data/API: /statements, /transactions, and cash-flow summaries. OpenData mapping: maps cleanly to the FDX Assets and Income report formats used by Fannie Mae / Freddie Mac partners.

E. Fraud monitoring and card-control orchestration

Business context: a fraud tool wants to auto-freeze a debit card on suspected compromise and log the wallet-token impact. Data/API: /cards/:id/freeze, /wallet/tokens, and transaction webhooks. OpenData mapping: outside the strict read-only 1033 scope — we treat it as a separate authorized action channel, with per-action confirmation and full audit logging.

1. OAuth-style authorization

POST /api/v1/trugrocer-fcu/oauth/token
Content-Type: application/x-www-form-urlencoded

grant_type=authorization_code
&code=ac_8e4a...
&redirect_uri=https://partner.example.com/cb
&client_id=tgfcu_partner_42
&client_secret=***

200 OK
{
  "access_token": "at_2f91...",
  "refresh_token": "rt_bd02...",
  "expires_in": 3600,
  "scope": "accounts:read transactions:read statements:read",
  "member_id": "tgfcu_m_000182734"
}

2. Transaction history (paginated)

GET /api/v1/trugrocer-fcu/accounts/acc_share_01/transactions
  ?from=2025-10-01&to=2025-12-31&page=1&page_size=100
Authorization: Bearer <access_token>

200 OK
{
  "page": 1,
  "total": 248,
  "items": [
    {
      "id": "txn_9a1b",
      "posted_at": "2025-12-19T14:02:11Z",
      "amount": -42.18,
      "currency": "USD",
      "description": "ALBERTSONS #0421 BOISE ID",
      "mcc": "5411",
      "category": "groceries",
      "type": "debit_card"
    }
  ],
  "next_cursor": "eyJwIjoyfQ=="
}

3. Mobile check deposit webhook

POST https://partner.example.com/hooks/tgfcu
X-TGFCU-Signature: t=1735599000,v1=4b0f...

{
  "event": "deposit.funds_available",
  "deposit_id": "dep_77c3",
  "member_id": "tgfcu_m_000182734",
  "amount": 1284.55,
  "hold_reason": null,
  "available_at": "2025-12-30T12:00:00Z"
}

// Partner responds 2xx within 5s;
// retries use exponential backoff up to 24h.

Error handling & rate limits

All endpoints use conventional 4xx/5xx codes with a stable error_code enum (token_expired, scope_insufficient, member_revoked_consent, upstream_timeout). Default rate limits: 60 req/min per token, 600 req/min per partner. We ship retry-with-jitter clients in Python and Node.js, plus a replay-safe webhook receiver template.

Deliverables checklist

• OpenAPI / Swagger 3.1 specification covering accounts, transactions, statements, bill pay, and webhooks
• Protocol & auth-flow report for TruGrocer FCU (OAuth, token refresh, device binding)
• Runnable reference source in Python and Node.js (token client, statement export, webhook receiver)
• Automated integration tests with mock and sandbox data
• Compliance pack: CFPB 1033 consent receipt template, FDX field mapping, NACHA retention notes
• Deployment guide for self-hosting or using our hosted pay-per-call endpoints

Engagement models

• Source code delivery from $300. You receive runnable API source plus full documentation; you pay after delivery upon satisfaction.
• Pay-per-call API billing. Use our hosted TruGrocer FCU endpoints and pay only for the calls you make — no upfront cost, ideal for teams that prefer usage-based pricing.

About us

We are an independent studio focused on fintech and OpenData/OpenBanking API integration for US credit unions and international banking apps. Our team includes engineers from core banking platforms, payment processors, mobile protocol analysis, and cloud security. We know how US credit union mobile stacks are built, where their data sits, and how to map it to FDX and CFPB 1033 without breaking the member experience.

• US credit unions, community banks, and cross-border OpenBanking
• Enterprise API gateways, OAuth/OIDC, and security reviews
• Custom Python / Node.js / Go SDKs and webhook test harnesses
• End-to-end pipeline: protocol analysis → build → validation → compliance pack

Contact

Ready to scope a TruGrocer FCU integration or ask about similar US credit union APIs? Share the target app and your data needs via our contact page and we will respond with a concrete plan.

Contact page

Engagement workflow

1. Scope confirmation: which TruGrocer FCU surfaces you need (accounts, transactions, bill pay, mobile deposit, cards)
2. Protocol analysis and API design (2–5 business days, complexity dependent)
3. Build and internal validation against sandbox or authorised member data (3–8 business days)
4. Documentation, sample clients, and test cases (1–2 business days)
5. Typical first delivery: 5–15 business days; third-party approvals or aggregator onboarding may extend timelines

FAQ

What do you need from us to start?

How long does delivery take?

How do you handle compliance and member consent?

Can you cover the similar credit unions listed above?