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Google Calendar provides powerful tools that enable users to create, manage,
and share event and calendar details. However, effectively managing complex
calendars can take a lot of time as the user views, creates, updates, and
shares individual events, particularly if the user must import or export
event information from other applications.
You can save time and effort for your users by extending Google Calendar with
Google Workspace add-ons. When you build a
Google Workspace add-on, you can define custom
interfaces that are inserted directly into Google Calendar, exactly where the
user needs them. These interfaces help automate calendar tasks, present
additional information to the user, or let the user interact with a third-party
system without having to switch to a new browser tab.
Google Workspace add-ons can define the following kinds
of extensions within Google Calendar:
Google Workspace add-ons are built using
Apps Script, and their interfaces defined using the Apps Script
Card service. See
Building Google Workspace add-ons
for an overview. Google Workspace add-on behavior is
configured using a
manifest, which includes
Calendar-specific sections.
When configuring your Google Workspace add-on to
extend Google Calendar, you must decide what interfaces to create for your
add-on and what actions it can take. See the following guides for more
information:
If you maintain a conferencing system, see
Third-party conferencing overview
for details on how to integrate your conference types within Google Calendar.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-18 UTC."],[[["\u003cp\u003eGoogle Workspace add-ons extend Google Calendar to automate tasks and streamline workflows, saving users time and effort.\u003c/p\u003e\n"],["\u003cp\u003eAdd-ons provide custom interfaces within Google Calendar for seamless user interaction without switching applications.\u003c/p\u003e\n"],["\u003cp\u003eThese extensions offer non-contextual homepages, contextual interfaces triggered by event interactions, and custom conferencing solutions.\u003c/p\u003e\n"],["\u003cp\u003eAdd-ons are built using Apps Script and configured with a manifest, allowing for flexible integration and functionality.\u003c/p\u003e\n"],["\u003cp\u003eDevelopers can build various interfaces and actions within their add-ons, enhancing the user experience within Google Calendar.\u003c/p\u003e\n"]]],["Google Workspace add-ons extend Google Calendar by inserting custom interfaces directly into the platform. These add-ons automate tasks, display extra information, and allow users to interact with third-party systems without switching tabs. Add-ons offer non-contextual homepages and contextual interfaces for viewing/editing events. Users can also utilize custom conferencing solutions. Add-ons are built using Apps Script and Card service, and are configured via a manifest. Developers can create specific interfaces and define actions, and can integrate third-party conferencing systems.\n"],null,["# Extending Calendar with Google Workspace add-ons\n\nGoogle Calendar provides powerful tools that enable users to create, manage,\nand share event and calendar details. However, effectively managing complex\ncalendars can take a lot of time as the user views, creates, updates, and\nshares individual events, particularly if the user must import or export\nevent information from other applications.\n\nYou can save time and effort for your users by extending Google Calendar with\nGoogle Workspace add-ons. When you build a\nGoogle Workspace add-on, you can define custom\ninterfaces that are inserted directly into Google Calendar, exactly where the\nuser needs them. These interfaces help automate calendar tasks, present\nadditional information to the user, or let the user interact with a third-party\nsystem without having to switch to a new browser tab.\n\nGoogle Workspace add-ons can define the following kinds\nof extensions within Google Calendar:\n\n- Non-contextual [homepages](/workspace/add-ons/concepts/homepages)\n- Contextual interfaces that appear when users click on an event in the calendar view.\n- Contextual interfaces that appear when users open an event to view or edit it.\n- Custom [conferencing solutions](/workspace/add-ons/calendar/conferencing/overview#conference_solutions) for Google Calendar events (see [Third-party conferencing overview](/workspace/add-ons/calendar/conferencing/overview) for details).\n\n| **Note:** You can't yet use Calendar add-ons on mobile clients.\n\nSee what you can make\n---------------------\n\nGoogle Workspace add-ons are built using\n[Apps Script](/apps-script), and their interfaces defined using the Apps Script\n[Card service](/apps-script/reference/card-service). See\n[Building Google Workspace add-ons](/workspace/add-ons/how-tos/building-workspace-addons)\nfor an overview. Google Workspace add-on behavior is\nconfigured using a\n[manifest](/workspace/add-ons/concepts/workspace-manifests), which includes\nCalendar-specific sections.\n\nWhen configuring your Google Workspace add-on to\nextend Google Calendar, you must decide what interfaces to create for your\nadd-on and what actions it can take. See the following guides for more\ninformation:\n\n- [Building Google Calendar interfaces](/workspace/add-ons/calendar/building-calendar-interfaces)\n- [Calendar actions](/workspace/add-ons/calendar/calendar-actions)\n- [Manifests](/workspace/add-ons/concepts/workspace-manifests#manifest-structure)\n\nIf you maintain a conferencing system, see\n[Third-party conferencing overview](/workspace/add-ons/calendar/conferencing/overview)\nfor details on how to integrate your conference types within Google Calendar."]]
