Integrating an API Verifactu with an ERP is easier when the workflow is defined before writing HTTP calls. The ERP holds customers, invoice lines and amounts; the connector must transform that information consistently and maintain a verifiable relationship with each external operation.
Start with a data map
Create a table linking each invoice detail to its API field: issuer, recipient, document identification, dates and amounts. Specify the format, source and validation for every field. Check the rules in the documentation tables and avoid copying an example from another operation without reviewing the differences.
Separate draft, issue and result
A user may edit a draft several times. Define when your system considers the invoice issued and coordinate the integration at that point in line with applicable requirements. Maintain separate statuses for the commercial invoice and its external processing. Delivering a request to the service and receiving its later result should not be presented as the same event.
Keep identifiers and prevent races
Store the relationship between the business, the local document and the identifier returned by the API. If two processes attempt to work on the same invoice, concurrency controls in your application should prevent duplicate operations. When a response is uncertain, check the available status before repeating the request; do not assume the API supports an idempotency key unless it is documented.
- Validate formats and amounts before submission.
- Record the technical result without exposing credentials.
- Show operators which documents need attention.
- Ensure each response is associated with the correct business.
Test reconciliation from the outset
Build a view that allows local invoices and external operations to be compared. This is particularly useful after an interruption or a record status change. A maintainable integration combines automation with a clear exception procedure, without postponing data recovery until after production launch.