Grant Cash Advance API integration services (EWA / OpenFinance)

1. Payroll provider reconciliation

An employer-side payroll vendor wants to reconcile earned-wage advances against scheduled net pay. The integration pulls the advance ledger plus repayment events, joins them on the user's payroll ID, and surfaces a single OpenFinance-style /advances/outstanding view. This avoids surprise deductions on payday and shortens dispute response from days to minutes.

2. Personal finance dashboard sync

A consumer PFM (think YNAB-style aggregator) consents to read the user's Grant Plus Bills & Spending categories and the linked-bank transaction stream. The PFM normalizes the categories, deduplicates against its own Plaid feed, and renders a clean cash-flow timeline that includes the upcoming Grant repayment as a forecast item.

3. Risk engine for second-look lenders

Buy-now-pay-later or small-loan partners scoring an applicant pull the user's last 90 days of Grant transactions, advance frequency, and Express Delivery usage. Heavy reliance on Express transfers and rolling repayment retries become explicit features in the underwriting model rather than indirect signals.

4. Marketplace affiliate attribution

A Marketplace partner — typically a credit builder, banking app, or insurance provider — wants click-through and conversion data tied to its offers. A webhook on each Marketplace click and a daily summary endpoint give partners enough signal to run their own affiliate ledgers and trigger remarketing flows.

5. Compliance and audit packs

Internal compliance teams export consent records, advance approvals, fee disclosures, and state-eligibility flags (the product is not available in CT, DC, MD, NV, RI, SC, and WI) on demand. The audit pack maps to ECOA documentation requirements and CFPB expectations for fintech disclosures.

Auth flow (OAuth-style token exchange)

POST /api/v1/grant/auth/token
Content-Type: application/json

{
  "grant_type": "user_consent",
  "consent_id": "csnt_4f2c…",
  "device_fingerprint": "<sha256>"
}

200 OK
{
  "access_token": "eyJhbGciOi…",
  "refresh_token": "rft_…",
  "expires_in": 1800,
  "scope": "advances:read transactions:read bills:read"
}

Cash advance status query

GET /api/v1/grant/advances?status=outstanding
Authorization: Bearer <ACCESS_TOKEN>

200 OK
{
  "items": [
    {
      "advance_id": "adv_8821",
      "principal": 150.00,
      "express_fee": 8.99,
      "delivery": "express",
      "claimed_at": "2026-05-08T14:02:11Z",
      "scheduled_repayment": "2026-05-22",
      "status": "outstanding"
    }
  ],
  "page": {"next": null}
}

Repayment webhook (server-to-server)

POST <your-endpoint>
X-Signature: t=1715347200,v1=…
Content-Type: application/json

{
  "event": "advance.repaid",
  "advance_id": "adv_8821",
  "amount": 158.99,
  "settled_at": "2026-05-22T13:14:55Z",
  "method": "ach_debit",
  "retry_count": 0
}

Bills & Spending export

GET /api/v1/grant/bills/spending
?from=2026-04-01&to=2026-04-30&format=json
Authorization: Bearer <ACCESS_TOKEN>

200 OK
{
  "period": "2026-04",
  "categories": [
    {"name": "Groceries",  "outflow":  412.30},
    {"name": "Gas",        "outflow":  186.04},
    {"name": "Subscriptions","outflow": 64.97}
  ],
  "net_cash_flow": -218.55
}

Compliance & privacy

Earned wage access is regulated unevenly in the United States. Our delivery aligns with the CFPB interpretive rule on paycheck advance products, Regulation E for electronic fund transfers, the Equal Credit Opportunity Act (ECOA) that Grant explicitly supports, and state-level fintech statutes (notably the carve-outs for CT, DC, MD, NV, RI, SC, and WI). Consent records and minimization defaults ship with every integration so audits do not require code archaeology.

Data flow / architecture

A typical pipeline runs: Grant Cash Advance client → authorized ingestion API (token exchange, schema validation) → encrypted storage (PII isolated, advance ledger separated from spending categories) → analytics or partner API output (signed webhooks, OpenAPI-described endpoints). Each hop logs consent scope and request hash so disputes have a single source of truth.

• Ingestion: token refresh, idempotent advance fetch
• Storage: row-level encryption, 90-day default retention
• Output: REST + signed webhooks, OpenAPI 3.1 spec

Deliverables checklist

• OpenAPI 3.1 specification for every endpoint
• Protocol and auth-flow report (OAuth, token rotation, device binding)
• Runnable Python and Node.js clients for the four core endpoints
• Postman / Bruno collection plus pytest integration suite
• Compliance notes covering ECOA, CFPB, Reg E, and state carve-outs

Engagement workflow

1. Scope confirmation: which Grant Cash Advance flows you actually need.
2. Protocol analysis & API design (2–5 business days).
3. Build and internal validation (3–8 business days).
4. Docs, sample apps, and test harness (1–2 business days).
5. Typical first delivery: 5–15 business days end to end.

About us

OpenFinance Lab is an independent studio that ships fintech and OpenData integrations for overseas clients. Our team has shipped production code for digital banks, EWA providers, payment gateways, and KYC vendors, and we pair protocol analysts with backend engineers on every project so the resulting code is both technically grounded and easy to operate.

• EWA, neobanking, BNPL, and small-dollar credit experience
• Authorized data extraction over reverse-engineered guesswork
• Custom Python, Node.js, and Go SDKs with type-checked clients
• Source code delivery from $300 — pay after delivery upon satisfaction
• Pay-per-call API billing — usage-based, no upfront cost

Contact

For quotes or to submit your target app and requirements, open our contact page:

Contact page

FAQ

What do you need from me to integrate Grant Cash Advance?

How long does delivery take?

How do you handle compliance for an EWA app?

Do you support pay-per-call billing?

Recent context (2024–2026)

In 2024 the CFPB issued an interpretive rule clarifying that paycheck advance products are a form of consumer credit and must disclose costs and fees clearly. That regulatory shift directly affects how Grant Cash Advance presents Express Delivery fees ($2–$21) and the Grant Cash Advance Plus subscription, and any integration we ship reflects those disclosure expectations in its data model.

Grant Cash Advance now sits in Kikoff Inc.'s broader product portfolio alongside its credit-builder app, and 2025 reviews credit it with sub-three-minute approvals and 98% of Express transfers settling in under 60 seconds, which puts a hard latency budget on any partner-side webhook handler.