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Integrations

REST API and webhooks: connecting systems in a resilient way

Versioning, signatures, idempotence and repetition logic make integrations operable in the long term.

In brief: Interfaces appear simple in the demo case, but become demanding due to timeouts, double transmissions and changing data models. Versioning, signatures, idempotence and repetition logic make integrations operable in the long term.

Why this matters now

Interfaces appear simple in the demo case, but become demanding due to timeouts, double transmissions and changing data models.

The useful target state

Versioning, signatures, idempotence and repetition logic make integrations operable in the long term.

How to proceed in a structured way

Implementation should start small enough to learn from real operations, but complete enough to test handovers and exceptions realistically. The following sequence has proven useful:

  1. 1
    Document resources and accountability
  2. 2
    Strictly validate inputs
  3. 3
    Check webhook signatures and time slots
  4. 4
    Make dead letter cases editable

Practical check before production use

A successful demo is not proof of reliable operations. Test missing permissions, parallel changes, network interruptions and invalid input as well.

  • writing requests support idempotence
  • Requests are logged traceably
  • each request has a correlation ID

Conclusion

Versioning, signatures, idempotence and repetition logic make integrations operable in the long term. The greatest benefit emerges when the business team, responsible owners and technology use the same process definition. A controlled pilot makes value and limitations visible before more teams or locations follow.

Frequently asked questions

Does this require replacing the entire system?

Usually not. A clearly bounded process is the better starting point. Existing core systems remain authoritative and are supplemented only where handovers, approvals or business logic are missing.

How should a useful pilot begin?

With a measurable problem, a manageable user group and agreed success criteria. Value, errors and open dependencies are then reviewed together.

Identify the right process

We assess your use case honestly.

In an initial call, we determine whether AEGIS OS, an integration or a custom solution is the right next step.

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