Change the interface without breaking the people who depend on it.
A published API is a promise. Versioning, a stated support window, and a deprecation path let you evolve it without the phone call that starts “our integration stopped working this morning”.
We define the policy, implement the version handling, and set the communication pattern for changes.
We learn how this works for you today, from the people involved in it.
We agree what good looks like, who owns which step, and how success is measured.
We deliver the work in a narrow first slice you can see functioning.
We measure it, correct it, and widen it only once it holds.
Credentials are vaulted, access is scoped to what the job needs, and every call is attributable. Least privilege is the default rather than an upgrade.
Monitoring surfaces the failure quickly and the interface is documented, so the fix is a change rather than an archaeology project.
From the data flow and the owners first, so the estimate reflects what has to move and who decides, not how many endpoints there are.
Tell us what you are trying to accomplish. If versioning and deprecation policy is not the right starting point, we will say so.