Implementation guide
ISP Payment Gateway Integrations
Gateway support must cover more than a payment button. The production workflow needs verified callbacks, idempotency, amount and currency checks, settlement references and clear exception handling.
Use the interface and documentation together.
The capture below shows the related ISPbills product area. Follow the linked documentation for current fields and prerequisites, then validate the exact device, provider, software version, failure path and rollback before production use.
Plan the complete path, not one isolated setting.
Connect supported ISP payment gateways for customer checkout, verified callbacks, invoice reconciliation, receipts and controlled service restoration. Confirm the exact device, software version, provider contract and failure behavior in a representative environment before production rollout.
Select the merchant product
Confirm country, currency, checkout method, fees, refunds and settlement directly with the provider.
Verify provider events
Authenticate callbacks and accept only a final status for the expected amount and currency.
Reconcile once
Map the transaction to the intended invoice, prevent duplicates and retain an operator-visible audit trail.
Prove the boundaries before automating them.
Record expected results, failure signals, the person who can approve a change, and the rollback path. Product support depends on the deployed architecture and integration version.
- Merchant approval and credentialsTest this requirement with representative data and retain the result in the implementation plan.
- Signature and replay protectionTest this requirement with representative data and retain the result in the implementation plan.
- Pending and reversed statesTest this requirement with representative data and retain the result in the implementation plan.
- Settlement and refund workflowTest this requirement with representative data and retain the result in the implementation plan.
Implementation answers
Does ISPbills support bKash and Nagad?
Yes. Supported Bangladesh payment workflows include bKash and Nagad; confirm the merchant product required for your account.
Are Stripe and PayPal supported?
They are listed among supported global integrations, subject to country and merchant availability.
Should a browser redirect mark an invoice paid?
No. Server-side provider verification should establish the authoritative transaction result.
Bring the actual routers, access design, billing rules and failure cases.
Explore the online workspace or ask ISPbills to review compatibility and migration scope.