Google Contacts, the address book built into Gmail, lets you keep track of all your contacts, see when you last interacted with them, and more.
Prepare API tables for review with missing values clearly marked.
Your teammate gets a shared spreadsheet and matching CSV, with missing values called out instead of buried in raw JSON.
Share verified database rows for monthly analysis.
Get a dated CSV and row count in your shared folder every month, or an error note explaining why the export stopped.