Understanding the Dynata User ID

Every user needs an ID to enter a survey.

The UID is made up of three parts:

  1. The Internal User ID
  2. Application ID (App ID)
  3. The Checksum.

This 3 part ID isn’t required for the Project API or the Invite API.

Example UIDs

  • test123-9145-a484a28915
  • lukeskywalker-9145-9561416ca3
  • PrincessLeia-9145-b6002abc56
  • BuzzLightyear-9145-2e6b7e2c16
  • FaMulan621-9145-68ab977d29
  • 19690720-9145-20fc2c14f0

Internal User ID

The Internal User ID is a case-sensitive alphanumeric string of up to 240 (we recommend keeping them short) characters in length. It should correspond to the user’s ID in your database.

Application ID

The Application ID (App ID) is your application’s numerical identifier. Each application you create has a unique App ID. You can find your App ID below the application name in the application list.


Generating a checksum is important to keep every transaction secure and protect the integrity of every generated user ID. It is essential for creating a proper user ID. Sequentially, the checksum comes as the third section of the UID. This can be generated in every programming language (e.g. Python, C#, Golang).

The Checksum is composed of the first 10 alphanumeric characters of the MD5 hash generated string of the Internal User ID, App ID, and Security Key. Since you already know what the Internal User ID and the App ID is, let us talk a little about your Security Key.

Security Key

The Security Key is an alphanumeric case sensitive string generated upon the creation of your application. It is unique to every Application and ensures the integrity of the integration. You can find the Security Key in the integration section of the application.

User Profiles

Depending on the product, you may also register a profile for each of your users.