Changelog

Changes to the public Mellow Product Costs API.

v1 — 2026-08-30

• Added GET /external/v1/product-costs.
• Added Bearer API Key authentication.
• Added purchase cost, inbound freight, shipping-to-customer cost, and warehouse fees.
• Added normal, sample, and all product segments.
• Added the interactive browser Playground.
• Clarified that date parameters select inclusive sales months using YYYY-MM-01.
• Added a 24-month request limit, 30 requests per 60 seconds rate limit, query timeout, and no-store responses.