About The Cobalt Guide
Know before you pay.
Check reported merchant multipliers before you tap your card.
Why it exists
Ever hesitate to ask, “Do you accept Amex?”
Or discover after paying that your purchase didn't earn 5× Membership Rewards points?
That's why The Cobalt Guide exists. If a location or earning rate looks wrong, help keep the guide accurate by submitting a report.
Open by design
Want to know how your data is handled?
Every line of the application is open for review.
See how accounts, reports, permissions, and moderation work directly in the source.
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Built by contributors
See something wrong? Help fix it.
Report missing locations, outdated earning rates, or incorrect merchant details. Each contribution makes the guide more useful for everyone.