Our free browser extension shows MCC codes and credit card rewards eligibility in real-time while you shop on Shopee, Lazada, Amazon, and hundreds of other stores.
Automatically detects the store you're on and shows its Merchant Category Code instantly. No manual searching needed.
See which credit cards earn bonus rewards at the current store, including miles per dollar and spending caps.
Supports Shopee, Lazada, Amazon, and hundreds of other online stores across Singapore and the region.
Download from GitHub and add to Chrome. One click setup, no account needed.
Browse Shopee, Lazada, Amazon, or any online store. The extension works automatically in the background.
A small overlay shows the MCC code and which credit cards earn the most rewards at the current store.
General Retail
General Retail
General Retail
Transport & Food
Groceries
Food Delivery
Travel
Lodging
...and hundreds more. Search any merchant on our homepage.
Yes, completely free and open source. No ads, no premium tiers, no data collection.
Currently Chrome and Chromium-based browsers (Edge, Brave, Opera). Firefox support is planned.
The browser extension is desktop-only. For mobile, use our website at check-mcc.sg to search merchants directly.
Our database is community-maintained and regularly updated. MCC codes are sourced from payment processor data and verified by users.
No. The extension only makes a lightweight API call when you visit a supported store page. It has minimal resource usage.
Install the CheckMCC browser extension and never miss bonus miles again.