Guides
Task-focused walkthroughs – choose a deployment model, connect your store, run in sandbox, go live on-chain, set policy, and harden for production.
Practical, end-to-end recipes for the things you'll actually do, roughly in the order you'll do them.
Get connected
Self-host vs hosted
The two ways to run Veto Checkout – what each owns, and how to choose.
Add agentic checkout to your site
Stack-agnostic connect – the discovery anchor and mounting the protocol on Node, Next.js, Express, Hono, or any framework.
Go live safely
Test mode & sandbox
Exercise the whole flow with zero real money – the mock rail, test keys, and mode isolation.
Go live with x402 + Coinbase CDP
Settle real USDC – testnet to mainnet, the verified traps, funding, and the cutover.
Policies & trust
Caps, mandates, and reputation floors – and publishing them as immutable versions.
Operate
Webhooks
Receive and verify HMAC-signed event deliveries from the hosted control plane.
Verify receipts
Verify a merchant receipt offline, and publish your verifying key.
Merchant privacy
What settlement reveals, per-checkout receiving addresses, and the honest tradeoffs.
Going to production
Swap the MemoryStore, choose a policy posture, and harden the deployment.
Receipts
On accept, the merchant issues an Ed25519-signed receipt that links back to the buyer's mandate. Two signed artifacts pointing at each other are your dispute evidence – verifiable offline, by anyone.
Self-host vs hosted
The two ways to run Veto Checkout – mount the zero-dependency SDK on your own domain, or use the hosted control plane. What each owns, what's identical across both, and how to choose.