Oracle CrowdTwist Commerce (POS) API
The point-of-sale side of CrowdTwist, served from a separate templated host. Purchase posts a receipt with line items, tenders and coupons and returns the per-item point breakdown including bonus-campaign multipliers; Fulfillment marks a redemption shipped; Return reverses points for a returned purchase. Authentication is the client API key in an X-CT-Authorization header — HMAC signing is explicitly NOT supported on this host. The receipt_id field is documented as a unique identifier per request and duplicates are rejected, which makes Purchase the only de-duplicated write in the platform.