FlowCheck: Financial analytics API

# FlowCheck API > Stripe payouts, Shopify orders, and bank data — one API. Connect, reconcile, build. - Support: support@usepopup.com FlowCheck unifies Stripe payout data, Shopify order and payout data, and bank account data (via Plaid) into a single REST API. Use it to check balances, track payouts from Stripe and Shopify, reconcile transactions against bank deposits, detect discrepancies, and build financial tools — without managing multiple integrations. - Base URL: https://developer.usepopup.com/api/v0 - Auth: Bearer token (`Authorization: Bearer fc_live_...`) - Response format: JSON envelope with `data`, `meta`, `errors` - Pagination: cursor-based - Rate limits: 60–6,000 req/min depending on plan ## Quick Start 1. Register: `POST /v0/auth/register` with `{"email": "you@example.com"}` 2. Use the sandbox API key returned in the response: `Authorization: Bearer fc_test_...` 3. Sandbox returns realistic mock data instantly. No payment required. 4. When ready for live data, complete checkout via the returned checkout_url. ## Authentication - `POST /v0/auth/register` — Create account, get sandbox API key instantly (no auth required) - `GET /v0/auth/register/status` — Get production API key after checkout ## Balance & Cash Flow - `GET /v0/balance` — Stripe available/pending + bank balances in one call - `GET /v0/cashflow` — Daily inflow/outflow breakdown (7d, 30d, 90d windows) ## Payouts - `GET /v0/payouts` — List Stripe and Shopify payouts with reconciliation status. Filter by `?source=stripe` or `?source=shopify`. - `GET /v0/payouts/:id` — Single payout with matched bank transaction details ## Transactions - `GET /v0/transactions` — Bank transactions from Plaid with filters and pagination ## Reconciliation - `GET /v0/reconcile/summary` — 30-day reconciliation summary - `GET /v0/reconcile/:payout_id` — Per-payout reconciliation detail with confidence score ## Sync - `POST /v0/sync` — Trigger a full sync of connected integra