Wiki
Reference guides that start from zero and assume no crypto background. Updated as products and regulations change.
Stablecoins 101: What They Are and How They Work
What stablecoins are, how they keep their peg, the difference between USDT, USDC, DAI and PYUSD, and the risks nobody puts in the marketing.
The Complete Guide to Crypto Cards (U-Cards)
How crypto-funded payment cards work, what 'U-card' means, the fee stack to check before you apply, and how to pick the right card for your country.
How Card Authorization Works: A Practical Walkthrough
What happens in the two seconds after you tap your card: the players, the ISO 8583 message, approval and decline paths, and where crypto cards plug in.
Cross-Border Payments: A Complete Guide
Bank wire, Wise, remittance apps, and stablecoins — how money actually moves across borders, what each path costs, and when to choose which.
Web3 Payments Glossary
The terms you meet when paying with stablecoins: gas, networks, on-ramps, MCC, 3DS, settlement and more — each explained in one or two plain sentences.
Stablecoin Regulation Around the World
The rules that decide which stablecoins and crypto cards you can use: the US GENIUS Act, the EU's MiCA, Hong Kong's licensing regime, and what they mean for users.
Blockchain Basics for Stablecoin Users
What stablecoin users actually need to know about blockchains: how transactions work, why some chains are cheap and fast while others are slow and expensive, and how to choose the right chain for your transfer.