External API integration
Problem
An integration depends on contracts, availability, and responses controlled by another system.
Analysis
The API contract, authentication, formats, expected errors, limits, and points where external data enters the local domain are reviewed.
Intervention
The integration validates inputs and outputs, records relevant failures, and defines safe behavior when the provider does not respond as expected.
Result or learning
For the record: treating an external API as an unstable boundary makes the system clearer and easier to recover.