When a customer messages on WhatsApp, SAP should know about it — automatically, accurately, immediately. This is the blueprint we use to wire messaging straight into SAP Business One: webhook intake, a validation layer that protects data quality, automatic Business Partner creation through the DI API, and two-way notifications — with a queue-and-retry spine so nothing is ever dropped.
When a customer messages on WhatsApp, SAP should know about it — automatically, accurately, immediately. This is the blueprint Axlume uses to wire messaging straight into SAP Business One: webhook intake, a validation layer that protects data quality, automatic Business Partner creation through the DI API, and two-way notifications — with a queue-and-retry spine so nothing is ever dropped.
It’s drawn from a delivered engagement; the client is confidential. What’s shown is the integration pattern — how we remove every manual step between a message and an ERP record without ever letting bad data reach SAP.
Sales and operations teams were creating Business Partner records in SAP B1 by hand, straight from WhatsApp conversations. Every new inquiry meant: read the message, open SAP, create a BP record, key in the data, send a confirmation back. Minutes per record — hours a day across volume, with all the errors, delays and missed entries that brings.
There was no automated notification either. Teams had no real-time alert when a BP was created; customers had no immediate confirmation. The whole bridge between WhatsApp and SAP was a person copying fields.
The brief in plain terms: when a customer messages on WhatsApp, SAP should know about it — automatically, accurately, and immediately.
Mapped the full onboarding journey (message → manual SAP entry → manual confirmation), defined the validation rules for a valid BP, evaluated WhatsApp providers (Meta vs Twilio), and mapped which SAP events should fire which notifications, to whom.
Designed a webhook-based event pipeline — message in, validate, create, notify — with queue-based processing for volume, a retry mechanism for reliability, and validation kept as a separate concern from the SAP write.
Built the WhatsApp Business API webhook to trigger the pipeline, and a validation layer that checks mandatory fields, formats and duplicates before anything touches SAP.
Integrated the DI API for programmatic BP creation with no human in the loop, then an outbound layer that fires WhatsApp/SMS confirmation to the customer and an alert to the team on success.
Queue-based processing so messages are handled in order with no race conditions, plus retry with exponential backoff so a slow or failed DI API call is re-queued, never lost.
The WhatsApp Business API webhook that turns an inbound message into an event and triggers the whole pipeline — no polling, no manual watching.
Mandatory-field, format and duplicate checks that run before SAP is touched. Bad data in SAP is worse than no data — so this gate is non-negotiable.
Programmatic Business Partner creation in SAP B1 through the DI API, with no human in the loop — the manual step, deleted.
Every inbound event is persisted to a queue immediately and processed asynchronously, in order — so volume never causes dropped events or race conditions.
Failed DI API calls are re-queued with exponential backoff, so a slow or briefly-unavailable SAP never loses a record.
Automatic WhatsApp/SMS confirmation to the customer and a real-time alert to the internal team — the communication gap, closed on both sides.
A message arrives on WhatsApp; the webhook fires; the validation layer decides whether it’s clean enough to proceed; the event goes on a queue; the DI API creates the Business Partner in SAP; and a notification goes back out. Every stage is decoupled, so volume, validation and reliability can each be handled on their own terms.
| Backend | .NET · C# |
| ERP Integration | SAP Business One DI API |
| Messaging | WhatsApp Business API (Meta / Twilio) |
| Event Architecture | Webhook-based event handling |
| Reliability | Queue-based processing · retry with exponential backoff |
| Validation | Custom pre-SAP data-quality layer |
| Notifications | WhatsApp API · SMS gateway |
What this pattern delivers:
Drawn from a delivered engagement; the client and commercial figures are confidential under NDA. We can walk a qualified prospect through the detail directly.
Data quality. WhatsApp messages are unstructured — customers don’t fill in forms. The validation layer has to interpret incoming data, check it against SAP’s mandatory BP fields, and either proceed or trigger a clarification — all before the DI API is called. Bad data in SAP is worse than no data.
Reliability. Webhook systems fail silently when a downstream API is slow or unavailable — if the DI API call fails, the message is simply gone. The queue-and-retry architecture solves it: every inbound event is persisted to a queue immediately, processed asynchronously, and retried on failure. No dropped records, no silent failures.
That’s what makes this a blueprint rather than a one-off script — the reliability and validation spine is reusable across any messaging-to-ERP automation.
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