Klaviyo's web tracking uses an encrypted identifier. However, there are many use cases that require developers to have access to a given profile's email or phone number. In such cases, developers can use this operation to exchange an encrypted identifier for a profile ID, which they can then use to retrieve the full profile data (by making a subsequent request to the get-profiles operation).

The exchange_id takes the following form:


The exchange_id appears in the url as follows: