Query Limit for Google Contacts API

Question

I am currently trying to make a syncing operation between my Database and Gmail's contacts. My first initial sync, downloading/uploading over 1,000 contacts per user might throw some errors up in gmails face.

Is there any work-arounds? What is the limitations to having many contacts?

My understanding is that it is limited per IP, and not per User... is this correct?

I hope that someone can share some info on this, I have searched the web, but haven't found the best of resources... Thoughts?!

Answer 1

I actually received a response from Google.

The query is currently per user and is quite high though there is a limit in the number of queries per second, per hour and per half a day you can send. Unfortunately, we don't publicly communicate on these values but I can assure you that normal applications (not spamming Google's servers) shouldn't have any issues.

Also, when syncing, please make sure to use the updated-min query parameter to only request contacts that have been updated since the provided time and use batch-request when sending requests to the API as it will perform multiple operations while consuming only one request on the user's quota.

Hopefully this helps someone else if in need.

Answer 2

Yes, there is a limitation on accessing the Google API (at least on Google Maps API) on an IP basis. The only workaround I was abble to find is to use proxy servers (or tor).