Pick a protocol. Watch a real payment clear through 5 fiduciary gates, get signed with ECDSA secp256k1, and settle on-chain. Same key. Same gates. Different chain.
4 steps · ~8 seconds · Tempo / PathUSD · All live
Stripe/Tempo Machine Payments Protocol. Session-based credentials. 0.6s finality on Tempo Moderato.
Stateless HTTP 402 payment. One signed credential per request. ~$0.001 gas on Coinbase Base L2.