Bring the current product identifiers, interface documentation and a small anonymised response sample. Include a normal product, a revised version, a missing record and a response whose field is incomplete. The source owner should explain what each example means. Discovery can then separate a mapping issue from an interface failure before proposing new software.
Choose the task the lookup is intended to support. Browsing a specification, checking an account balance and approving an operational change are different requirements. This guide’s working scope is a read-only product lookup. Any wider action needs an explicit contract, authority and acceptance plan. Account access and provider execution remain dependencies until they are separately inspected and approved.
During remote review, the Hyderabad data owner confirms identifiers and meanings while our Ranchi team presents the request and response journey. Check how the interface behaves when information cannot be matched or is no longer current. Preserve useful existing application behaviour and record which system owns each fact. That makes a later contract change easier to assess than a connection described only as “the API works.”