> For the complete documentation index, see [llms.txt](https://docs.whalesync.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.whalesync.com/connectors/memberstack/memberstack-custom-fields.md).

# Memberstack custom fields

Memberstack custom fields are supported differently in their API than other fields. In order to sync custom fields, you need to create a member in Memberstack with the email "<schema@whalesync.com>".

Once you create that member, add the custom fields you want to sync and **make sure to put values in those fields**.

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