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Prerequisites

See [Tracking API](🔗) for a better understanding of how tracking works. This topic references [Postman](🔗) for querying and testing of RESTful APIs, you can use other similar tools to get the same result.

Use the Profile Store API URL for querying profiles. The format of the request should be **{Profile Store API}/api/v1.0/trackevents**. An Authorization header must be added to the request. The value should be:

`epi-single {YOUR PROFILE STORE API KEY}`

The profiles endpoint will return 100 profiles if you do not use any query string. Optimizely follows Microsoft REST API Guidelines for supporting `$filter`, and `$orderby`.