A broken shipping rule raises no error. It removes the option to pay, and nothing lands in your admin. Test rates checks one address. RateGuard checks your whole catalogue: products flagged digital, products with no weight, zones with no active rate, brackets that stop too low, locations that cannot ship online, profiles that skip countries you sell to, and zones left to a carrier API. Every finding names the setting to change. RateGuard reads your store, never edits it. Three scans offered.

• Scans products, zones, weights and price brackets for rules that return no rate.
• Names the cause of each missing rate, and the one setting you need to change.
• Reads your store and never edits it. You make each fix in your own admin.
• A checkout health score, so a re-scan shows you the gap is closed.
• A PDF of any scan to hand to a developer or an agency.