Contract first
Define request, response, event or file contracts clearly enough that both sides can validate them independently.
Connecting systems is more than moving data between endpoints. Reliable integrations make contracts, authorization, retries, duplicate handling, observability and ownership explicit.
Define request, response, event or file contracts clearly enough that both sides can validate them independently.
Every integration needs an explicit machine/user identity, least-privilege permissions and a secure credential lifecycle.
Repeated delivery should not create unintended duplicate side effects. Define stable identifiers and duplicate handling where operations can be retried.
Set bounded timeouts, controlled retries and backoff based on the actual dependency rather than waiting indefinitely.
Understand provider limits, burst behavior, queues and what happens when one side becomes slower than the other.
Document source-of-truth ownership, field meanings, validation rules and how incompatible or missing data is handled.
Expose enough correlation, error context and health information to trace failures without logging secrets or unnecessary personal data.
Version interfaces deliberately and plan how producers and consumers move through breaking changes without hidden coupling.
Share both sides of the integration, authentication method, data ownership, expected volume and failure constraints so the boundary can be designed clearly.