Is it possible to develop an add-on for Google Calendar? - add-on

We would like to create a google Calendar add-on/plugin/extension that will let us push the event to our cloud hosted application when creating or editing an event in Google calendar.
We have a cloud hosted application that our clients use. One of the features in our application is events. Our clients would like to have this feature wherein they can push any event from their Google Calendar to our application. We have been trying and searching but while its possible to create such add-ons for gmail and google docs, we cannot find anything for calendar. It will help if someone can point us to a way by which we can achieve this. Thanks.

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Can I get calendar meetings out of MS Teams?

I want to find if you can programmatically get calendar information out of MS Teams.
I was searching but didn't find any information, as with any documentation related to Microsoft you can't find anything useful.
So What I need any of:
some kind of WebHook, maybe that will run my script when new even is added to my calendar.
MS Teams call my script the meeting.
API that will allow exporting events from the calendar, so I can use a cron job to sync with the app I plan to create.
Basically, I was thinking about this tool ntfy. But I don't want to use MS Teams app for my phone if there is one, because I would like to have an app that will integrate with MS teams and Google Calendar. That I have to use at work. I'm a contractor for a software company that has a client that I'm working for. I need to use MS teams for a software company and Google Calendar for the client. Also, I can't log in with my work Google account, because it's blocked for the security of google drive (this at least was the error message). So my own Android app is the only way to have notifications on my phone (I need it because I sometimes forget about the meetings).
How I should create something like this? I only need general advice about integration with MS Teams. What API should I use? Will ask about Google Calendar in another question.
Note that I have zero knowledge about MS Teams, was searching for some developer documentation but was not able to find anything that can be useful for the thing I need.
I don't have any code yet, I'm investigating possibilities.
You could use so-called "graph api", the api Microsoft promotes to interact with anything related to Microsoft, including teams. There is simply a method to get all events for a team (i.e. group):
https://learn.microsoft.com/en-us/graph/api/calendar-list-events
There is an online sandbox you could use to play with it:
https://developer.microsoft.com/en-us/graph/graph-explorer

Can you change google calendar user settings via API?

Is it possible to change user settings in google calendar via API? What I found on their developer web documentation suggests that no, but maybe there is something I missed.
Thanks for any answers
The Google calendar api gives you access to a users google calendars. It does not give you access to change any settings for the user on the Google calendar web application thats two different things.
You can update the calendar itself changing calendar update some of the basic information about a calendar.
Unfortunately what you want cannot be achieved.
As you clearly noticed in the Calendar API documentation, the operations accepted for Calendar settings are: get, list and watch.
What you can do instead is to file a feature on request on Google Issue Tracker here.

Building a calendar webapp syncing with Google Calendar, Outlook and Apple Calendar

I am about to build a simple webapp that has several tasks, each of which has got a due date.
I would like this webapp to automatically sync with Google Calendar, Outlook and Apple Calendar - 2-way integration would be a plus.
The webapp is built on a LAMP server.
What's the cleverest way I can go about this from a point of view of limiting the workload as much as possible?
And also, is that even possible? I wasn't able to find an API for Outlook or Apple Calendar.
Is CalDev the answer? Is there any product/software that will do that automatically, so that I need only to sync with it and it will do the rest?
Thanks.
You could do the following:
Synchronize your proprietary calendar with Google Calendar (make this your "master calendar") using the GCal API; if your application can produce a valid ICS file then you can import it directly to Google Calendar. As this feature is discontinued by Google you can use some online WebDAV based import/export service (I use for this Synqya)
Use the WebDAV access to the Google Calendar to synchronize Outlook and Apple Calendar with it using their calendar subscription features (this would be one way sync). If you need secured access to GCal and 2-way sync, it will involve further steps.

Outlook Calendar Sync with custom calendar

We have our own custom calendar in our portal which is developed in Java. Is there a way to sync this calendar with Outlook calendar. I can sync this calendar with Google Calendar as Google Calendar API is available. Does anyone know any documentation or links where I can read about this?
Thanks
You can use COM to interact with Office products.
If you can sync your proprietary calendar with Google Calendar then you can sync your Google Calendar with Outlook using WebDAV.
So you could:
Use some Outlook plugins to access the Google Calendar using WebDAV API
Use the standard Outlook Publish/Subscribe functionality with some WebDAV based online syncing service (I use Synqya) that allows you to sync your Outlook events with Google Calendar
I am syncing our calendar with google and google calendar with outlook.

How to embed ics file into google calendar

I'm new to using the Google Calendar API.
I can create .ics calendars using a php app.
I would like to know if it is possible for Google Calendar to allow embedding of those calendars on to my website without having to add it to an account. I really like the google interface, and if this could work in any way, that would be great.
I'm going to say "no". To utilize the Google Calendar interface (e.g. widget) on your website and have it display calendar data that you've created (.ics via your PHP app), at some point, that data needs to be loaded into a Google Calendar account.

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