Hi community,
We are testing the API integration and are looking for some help in order to retrieve more attributes.
Main thing what we cannot seem to find is:
Is there anyone here who is willing to give some guidance? Would be very grateful.
Thank you,
Ralph
Hi
I have found a similar post here that might help you. 
Basically, to retrieve custom Attributes through the API integration, you have to whitelist these attributes under the API credentials settings.
This is visible in Settings > Integrations > API Credentials > Corresponding API Credentials > Readable Attributes. You can add the mentioned attributes to the list. This will enable their retrieval through the API .
If you would like more information about the configuration, you can consult our Helpcenter article:
Generate and manage API credentials
I hope this helps! Please let me know if you have further questions.
I wish you a lovely afternoon. 
Regards,
Weena
Thank you very much. This is what I missed.
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