One extension that covers everything Meta asks for. The pixel base code is injected on every storefront page, and the standard events are wired to real OpenCart data: PageView, ViewContent on product pages, AddToCart, InitiateCheckout and Purchase on order confirmation. Prices, currencies and content IDs are built server-side from the product and order records, so nothing depends on scraping the theme's HTML. AddToCart is detected by watching OpenCart's own checkout/cart.add request (XHR and fetch), which means it keeps working on custom themes without a single template edit. The Conversions API mirror sends AddToCart and Purchase server-to-server with SHA-256 hashed customer data, and every server event carries the same event_id as its browser twin so Meta deduplicates the pair instead of double-counting. Send immediately, or queue and deliver from cron on busy stores — either way, every attempt is written to an auditable log in the admin panel with Meta's own response. Finally, a token-guarded Meta catalog feed (RSS 2.0 + Google namespace) exports id, title, description, availability, condition, price, sale price, link, image, brand, MPN, GTIN and category path, using the same content ID rule as the pixel so your catalog matches your events. A built-in setup guide tab walks through Events Manager step by step, and a Send Test Event button verifies your access token before you go live.