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Use cases → Documents and Drive

Extract attachments from Google Calendar events

Pull linked files from calendar events for compliance, migration, or downstream automation using a delegated service account.

Who it is forEngineering or operations teams automating compliance, archiving, or reporting workflows involving event attachments.
APIsCalendar API, Drive API
Typical scopescalendar.readonly, drive.readonly

The problem

Calendar event attachments are often missed in compliance sweeps or migrations because they're not in mailbox or shared drive exports. Manual extraction is unreliable and doesn't scale.

How it works

  1. List events with attachments using the Calendar API and impersonation.
  2. Extract file IDs from the event 'attachments' field (these are Google Drive file links, not raw files).
  3. Fetch file metadata and content using the Drive API, impersonating the event organiser or attendee.
  4. Log extracted files and link them back to the originating event for traceability.

What changes

Event attachments are reliably extracted and mapped, closing a common blind spot for compliance or migration.

The trap in this one. The Calendar API only stores Drive file attachments as links; if the impersonated user loses access (e.g. file moved, permission revoked), the Drive API returns a 404 or 403 with no context. There is no notification in the Calendar API that the attachment is now inaccessible, so you silently miss files unless you handle and reconcile these errors explicitly.

Watch it explained

“PupiBot Demo — AI Assistant for Google Workspace (Calendar, Sheets, Tasks, Docs, Contacts, Gmail)” — Pupi Bot on YouTube. Third-party video, included because it covers this ground well. We are not affiliated with the channel.

Questions people ask

Do you get the file itself or just the link?

You get the Drive file ID from the event, but must fetch the file separately with the Drive API, under the right user's context.

What about non-Google Drive attachments?

Only Google Drive files are supported as attachments in modern Calendar events; legacy uploads or external links may not be extractable.

Want this built?

This is a pattern we run in production. We will set up the delegation and build this on top of it — $500 per hour, most of it working the same day.

Talk to us Or read the setup guide

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