Sandbox

• Prepare on the docs origin is dry-run — live Sepolia Host spend is Host lab
• Prepare = lab API prepare-only; Manual Execute = settle orientation stub; MetaMask Deposit / Send / Withdraw Execute opens Host lab
• MetaMask on docs binds your address; Core-write Execute opens Host lab for prove + submit
• Throwaway test keys only — never paste production private keys or unlock material
• Docs lab success is not upstream catalog listing or operator Host-spend evidence
• This page is documentation — live Host trial is Host lab
• Sketch is orientation — Prepare uses the docs lab API. MetaMask Try Deposit / Send / Withdraw on Host opens live Sepolia Host lab.

Operator evidence: live Host spend runbook · SDK wallet Host guide