ERP API Integration Explained: REST, Webhooks, Auth and Idempotency
A plain-English explanation of ERP API integration: REST APIs, webhooks, authentication methods, idempotency, pagination, rate limits and error handling.
Integration · Payments
Overview
We integrate Stripe with your ERP using webhooks and balance transactions so every payment, fee and payout lands in the right place.
01Data
| Entity | Direction | Notes |
|---|---|---|
| Payments | App → ERP | Successful charges and payment intents registered against invoices or orders. |
| Payment links / invoices | ERP → App | ERP invoices can generate Stripe payment links or invoices. |
| Refunds | ⇄ Both | Refunds initiated in either system are mirrored. |
| Disputes | App → ERP | Chargebacks flagged on the customer and invoice. |
| Fees | App → ERP | Processing fees posted to expense accounts. |
| Payouts | App → ERP | Payouts matched to bank deposits through a clearing account. |
02Use cases
Customers pay ERP invoices by card via Stripe.
Recurring charges reflected in ERP revenue and receivables.
Bank deposits matched automatically.
03 — Architecture
Stripe webhooks (payment succeeded, refund, dispute, payout paid) are verified and queued. For reconciliation, the integration reads balance transactions for each payout, which list every charge, refund and fee included.
Payments post to a Stripe clearing account; payouts move the net balance to the bank account, so the bank statement matches a single ERP entry.
04Reliability
Restricted API keys limited to the resources required, stored in a secrets manager. Webhook endpoints use signing secrets.
Events are processed idempotently by event ID. Payments that cannot be matched to an invoice are placed in an unmatched queue for finance.
Outbound calls use Stripe idempotency keys so retries are safe. Stripe itself retries failed webhook deliveries; our endpoint acknowledges only after the event is stored.
05 — Data mapping
| Stripe | ERP |
|---|---|
| PaymentIntent / Charge | Customer payment |
| metadata.invoice_ref | ERP invoiceSet when payment is created |
| balance_transaction.fee | Bank fees expense |
| Payout | Bank transfer from clearing |
| Dispute | Activity / receivable flag |
06 — Automation
07 — Security
Card data never touches the ERP; Stripe handles it. Webhook signatures are verified, and API keys are restricted and rotated.
Related
Other integrations
Insights
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FAQ
Yes, via payment links or a portal payment provider.
Fees are posted separately from the balance transactions so revenue stays gross.
Yes, with invoices and payments synchronised; we decide which system owns the subscription logic.
Next step
Tell us your volumes, channels and data rules. We will outline the architecture and the risks before anything is built.