# 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**.

{% embed url="<https://www.loom.com/share/eecc3fefe0b74f8584fa3d2e3c41ec58?sid=724ac704-f427-4acb-8ba5-95690d9f5b45>" %}


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# Agent Instructions: Querying This Documentation

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Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.whalesync.com/connectors/memberstack/memberstack-custom-fields.md?ask=<question>
```

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Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.