CFS field exception in retrieve API [Exception]

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Table of Contents

Screenshot of the Custom fields:
Values in the CFS field from Lead Details:
GET : API response:

When utilizing the following API to retrieve lead data, please note a distinct behaviour concerning Custom Field Sets (CFS). This particular API, widely employed across numerous clients for obtaining the latest modified values, presents an exception regarding CFS fields in its response.

API Endpoint: https://api-in21.leadsquared.com/v2/LeadManagement.svc/Leads.RecentlyModified?accessKey=AccessKey&secretKey=SecretKey

Typically, in other retrieval APIs, CFS field values are directly accessible. However, in this case, you will encounter a unique object identifier specific to the Backend instead of the direct CFS field values.

Kindly be mindful of this distinctive approach in handling CFS fields while leveraging this API.

PFB the sample case scenario:-