# Add to membership with CSV

Add to the current population membership with the population in this request.
Format is a CSV document.

Endpoint: POST /supercases/{supercaseId}/populations/draft/members.csv
Version: 2025-03-26
Security: oauth2, bearerAuth, apiKeyHeader

## Path parameters:

  - `supercaseId` (string, required)
    The ID of the supercase