,appSecret). update(appKey). update(rawBody). digest( }),async(req,res)=>{constauthorization=req. header( Building a webhook pipeline that survives duplicate deliveries, delayed events, missing messages, invalid signatures, and seller authorization changes is the real engineering work. This guide explains how to build a production-ready pipeline for TikTok Shop Customer Service messages—from HTTPS ingress to history reconciliation. First, Understand the ScopeTikTok Shop Customer Service API is designed for conversations between buyers and sellers in a TikTok Shop.