Whether it is a delivery notification from SAP S/4HANA, an urgent alert from SAP Field Service Management or a shift update from SAP SuccessFactors: when time-critical information must reach people reliably, SMS remains one of the most direct channels. Via SAP BTP, it can be integrated across SAP applications, from order management and logistics to field service and HR, and AI agents are increasingly rely on it too.
Why SAP Business Accelerator Hub Speeds Up Your Integration
With SMS running through so many SAP processes, new integration approaches are worth a closer look: published standard APIs, AI-assisted testing and integration flow generation, and governed access for AI agents. They save project time, reduce risk and open the door to more automation. In modern SAP architectures built around a clean core and SAP BTP, that starts with documented standard interfaces. That is why we are publishing our messaging APIs on the SAP Business Accelerator Hub, starting with the Retarus SMS for Applications API, right where SAP teams and partners design, test and build their integrations. Validated and governance-reviewed by SAP, the API is ready to test right away and reusable across projects. Integration engineers and SI partners get shorter projects, process owners can automate faster, and IT leaders and procurement get an upgrade-safe standard from a single provider.
Assess, Test, Connect – Your Path to Production
- Assess both sides of the integration in one place: explore official published SAP APIs, packages and documentation directly in the SAP catalogue, making it easy to align data structures, payloads, and response handling early on.
- Test in two steps API calls directly in the Hub (“Try Out”): Explore requests and responses instantly in the AI-generated API sandbox with just your SAP login. Then add your Retarus test credentials as a new environment to send real SMS and check live delivery status with your own data and use case scenario. Image: Choose your szenario and try out in SAP SDK or your own test environment
- Connect smoothly within standard SAP tools: Find the Retarus SMS API under Discover in SAP Integration Suite, copy it into API Management or generate an integration flow from it, or use it as an Action project in SAP Build Process Automation. No custom connector required.
Built Lean, Ready for Agents of tomorrow
The Retarus SMS API connects to SAP Cloud Integration through the standard HTTP adapter, with no Open Connectors layer in between. That removes one hop and the Open Connectors payload limits. One request can carry personalized messages for up to 3,000 recipients, and longer texts can go out as multi-part SMS with up to 20 segments. Your iFlows stay lean, message counts stay low and delivery status stays easy to track for every recipient. The same API is ready for AI agents.
With the MCP Gateway in SAP Integration Suite, it becomes a governed tool for agents built in Joule Studio or Microsoft Copilot Studio. Triggered by a business event via SAP Event Mesh, an agent can draft an SMS about a delayed shipment, get human approval and send it within seconds. It then checks the delivery status per recipient and reacts right away, for example by retrying or escalating.
Trusted by Global Enterprises and Partners
International enterprises and system integrators with high demands on sovereignty and compliance rely on Retarus Enterprise SMS to bring their global SMS use cases together with a single provider. Retarus runs its own carrier management and infrastructure, and dedicated service management and delivery teams keep operations stable and reliable. See how our customers use it:
Field Service and Maintenance: Immediate alerts for technicians in the event of high-priority incidents, SLA escalations, or short-notice schedule changes.
Bosch: Sends SMS alerts and fax documents straight from 20 connected SAP systems worldwide.
DZ BANK: Delivers SMS passwords for secure employee authentication, integrated with SAP and email.
Personalized Batch Notifications: Bundled dispatch to large recipient groups in a single API job, such as route changes, delays, or time-slot updates, supporting up to 3,000 recipients per job.
Transparent Status Tracking: Automated retrieval of job and individual recipient delivery statuses via API, allowing failed deliveries to trigger follow-up workflows in SAP or your service desk.
What you need
Check out the details and test the API for yourself on Retarus’ official page as an SAP Build Partneron the SAP Business Accelerator Hub here.
Reach out to us your individual offer and SMS API test account:
https://www.retarus.com/contact/
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