Settlement, held.
Three interactive receipts.
Each runs live in your browser and returns
a real Kaspa mainnet transaction proof.
Cadenza runs x402, MPP, and AP2 — the three live agentic payment protocols — through the same covenant suite on Kaspa L1. One SDK, one settlement path, three protocol surfaces.
402 PAYMENT REQUIRED → 200 OK · < 1 s · mandate-bound
Why per-event billing needs a new rail
An AI agent making 10,000,000 LLM inference calls at $0.001 per call equals $10,000 in real economic spend. Here is what settling that spend actually costs, by rail.
| Rail | Per-tx fee | Transactions | Total fees | Real-time? |
|---|---|---|---|---|
| Stripe (per call) | $0.30 + 2.9% | 10,000,000 | $3,300,000 | yes |
| Ethereum mainnet | ~$5 | 10,000,000 | $50,000,000 | yes |
| USDT on Tron | ~$1 | 10,000,000 | $10,000,000 | yes |
| USDC on Base | ~$0.05 | 10,000,000 | $500,000 | yes |
| Tempo (Paradigm + Stripe · EVM per-tx) | ~$0.005 | 10,000,000 | $50,000 | yes |
| Stripe (monthly batch) | $0.30 + 2.9% | 1 | $293 | no |
| Cadenza Stream (batched · Kaspa UTXO) | sub-cent / batch | ~100 | $0.50 | yes |
100,000× cheaper than Tempo — the closest architectural competitor. 6,600,000× cheaper than Stripe. All in real time on Kaspa L1. Batched settlement across 10M events on a UTXO chain with covenant-enforced state is what closes the ratio.
Live demos
Each button runs a live receipt through a Cloudflare Worker mimicking the Cadenza SDK. Settlement hashes for demos 01 and 02 are real Kaspa mainnet transactions — click to open the explorer.
Receipt