# Pass Custom Variables

Our platform can pass through any variable in the entry link. This allows you to track additional information about the user or session.

# Configuration

When creating a project, specify the custom variables you want to pass through:

{
  "projectName": "My Project",
  "targetUrl": "https://example.com/survey",
  "customVariables": "userId,sessionId,source"
}

Add the custom variables as query parameters to the entry link:

https://verify-eu.realeyesit.com/project/{projectSlug}?userId=12345&sessionId=abc123&source=email

The custom variables will be appended to the target URL when the user is redirected:

https://example.com/survey?userId=12345&sessionId=abc123&source=email&verificationStatus=OK

Use clear, descriptive names for your custom variables to make them easy to identify in your analytics.

Avoid using parameter names that start with re- as these are reserved for Verify system parameters.