Scope app integrations by their business outcomes, authority boundaries and failure behaviour. Identify what must happen in the external system, how the app confirms it and who resolves uncertainty. Payments, notifications and record synchronisation should not share a generic success flag merely because all three use network requests.
Let’s plan your app integrations.
Bring your requirements and the decisions you need to make. We’ll help you clarify the scope, explore the trade-offs and plan the next step.
Create an integration inventory
Record each provider or internal system, the information exchanged, credentials and permissions, expected volume, test environment and operational owner. Identify what changes if the dependency is unavailable.
Choose the authoritative source for each result. A message accepted for delivery, a payment request accepted for processing and a customer record accepted by ERP represent different business states.
Define outcomes and exceptions
| Integration | Outcome to establish | Failure to demonstrate |
|---|---|---|
| Payment | Authoritative transaction state | Timeout after acceptance |
| Notification | Agreed delivery or in-app status | Device unavailable or permission denied |
| File service | Complete validated file | Interrupted upload |
| Identity | Intended account and current authority | Expired session or removed access |
| CRM or ERP | Accepted business record | Rejection or duplicate submission |
| Analytics | Defined event population | Retry creates duplicate event |
Adapt the inventory to the chosen products and current documentation. Do not assume identical guarantees across providers.
Model an uncertain payment outcome
In a hypothetical test, the customer confirms payment and the connection drops before the app receives the result. Define the pending display, the authoritative reconciliation and whether another attempt is permitted.
Repeatedly showing a pay button without explaining the existing attempt can create confusion. The backend should retain the appropriate reference and determine the outcome according to the provider's actual integration contract.
This example describes product requirements. It does not prescribe financial processing rules or claim that a provider implements a particular recovery mechanism.
Treat notifications as a communication path
A notification can alert the user that work needs attention, but it should not be the only place the product stores important task state. If delivery fails, the authorised user may still need to find the work inside the application.
Decide what content appears on a device lock screen and what requires authenticated access. Plan links that open the intended record and handle unavailable or no-longer-permitted content gracefully.
Make recovery and support visible
Assign stable request and business identifiers. Distinguish never attempted, pending, rejected, completed and corrected work where those states matter.
Give support an appropriate inspection and replay process. Retrying must follow the external contract and avoid duplicating consequential actions. Test repeated events, late acknowledgements and provider outages using controlled environments.
Questions product teams ask
Is a successful HTTP response enough?
It establishes the documented transport or service response, not necessarily the final business outcome. Define the relevant acknowledgement and later state.
Should every integration run in real time?
Use the task's freshness and dependency needs. Batch work also requires ownership, reconciliation and visible failures.
Prepare the integration brief
Bring the inventory, current provider documentation and uncertain-outcome examples. Use the API buyer checklist and mobile development overview to price the complete work.
