List segment subscriber IDs OAuth Scope: segments:read
List segment subscriber IDs OAuth Scope: segments:read
List subscriber IDs for a segment. Returns a lightweight array of subscription IDs only, without additional subscriber details.
**Use this endpoint when you only need subscriber IDs** (e.g., for counting, ID-based lookups, or integrations with external systems). If you need full subscriber details (email, status, custom fields, etc.), use `/segments/{segmentId}/members` instead.