Agentic payments, x402
Your agent pays per call. You keep the receipt.
In public on Starknet and on Base, in private on Starknet and across to Base, built on STRK20. Try it on Sepolia, below.
Base Sepolia
npx -y @vauban-pay/mcp tryCreates your own key on your machine, gets 1 test USDC for it, pays our demo x402 offer with it and prints the transactions. Test USDC has no real value.
Starknet Sepolia
npx -y @vauban-pay/mcp try --network starknet-sepoliaCreates your own Starknet key on your machine, gets test STRK for it, deploys your account, pays our demo x402 offer and prints the transactions. Test STRK has no real value.
No wallet, no sign-up, none of your money.
| Testnet | Mainnet | |
|---|---|---|
| Public, on Base. Your agent pays in test USDC. The Base Sepolia try is above. | Sepolia: try now | Mainnet: 0.01 USDC per call |
| Public, on Starknet. Your agent pays in STRK. The payment and its receipt are public. The Starknet Sepolia try is above. | Sepolia: try now | Mainnet: 0.5 STRK per call |
| Private, on Starknet. Built on STRK20. Private here means: no field on the chain names the payer, the recipient or the amount. The service that proves the payment, and whoever holds the pool's disclosure key, see more. | Sepolia: coming | Done on mainnet: the transaction, open to you: coming |
| Private, signed post-quantum, on Starknet. The same private payment, with a signature built to resist a quantum computer. Its mainnet transaction is the one on the line above: it was both. Private means the same here: no field on the chain names the payer, the recipient or the amount. The service that proves the payment, and whoever holds the pool's disclosure key, see more. | Sepolia: coming | Done on mainnet: the transaction, open to you: coming |
| Private bridge, Starknet to Base. Your agent pays privately on Starknet, authorized by a post-quantum signature on Starknet; the merchant is paid on Base. Private here means: no field on the chain links the original payer to the recipient on Base; the amount and the recipient are visible on exit. The service that proves the payment, and whoever holds the pool's disclosure key, see more. | Sepolia: coming | Done on mainnet: on Starknet on Base, open to you: coming |
Your agent asks for a resource, gets a price, pays, and receives the resource. Each deposited receipt is a public record on Starknet.
What you can pay today
Three offers, open now. Each one answers in standard x402 v2: HTTP 402 with a PAYMENT-REQUIRED header that carries the price.
Base: 0.01 USDC per call
A demo offer.
https://pay.vauban.tech/x402-base-mainnet/v1/quoteEthereum: 1 USDC per call
A demo offer.
https://pay.vauban.tech/x402-ethereum-mainnet/v1/quoteStarknet: 0.5 STRK per call
The facilitator submits the transaction.
https://pay.vauban.tech/x402-mainnet/v1/quoteCheck your receipt
Check a receipt on the Apodix explorer: it shows what is proven, and what is not yet.