put
https://api.split.io/internal/api/v2/segments///uploadKeys?replace=false
Bulk upload a list of identifiers via JSON to a segment. The segment must exist before calling this endpoint. Segments are limited to 100,000 members and each call can only include 10,000 new members at a time. This endpoint requires a JSON body with the keys array and optional comment field; path and query parameters define which segment and environment to update.
👍 Tip
On the Enterprise plan, you can create large segments (that can contain over 100,000 members).