# Issue a Card Give an agent a virtual card it can use at any merchant — under the same kind of per-agent limits as the rest of its spending. The card settles normally; every swipe is checked against the agent's policy and recorded. ## How it works 1. You link a card program and issue a virtual card bound to an agent. 2. When the card is used, the agent's card policy — a daily limit and merchant rules — decides whether to approve, in real time. 3. The decision is recorded for a tamper-evident audit trail. The card itself settles off-chain, like any card. ## Set it up Card setup runs through the platform: ```typescript import { PlatformClient } from "@newton-xyz/isaac"; const platform = new PlatformClient({ /* baseUrl, apiKey */ }); // 1. Link your card program await platform.linkCardProgram(vaultAddress, { program_id: "...", api_key: "...", }); // 2. Issue a card for an agent const card = await platform.createCard(vaultAddress, { agent_address: "0xAgentAddress", memo: "research agent card", }); // 3. Set the card's spending policy — a daily limit and merchant rules await platform.setCardPolicy(vaultAddress, { card_policy_params: { /* per-agent daily limit + allowed merchant categories */ }, }); ``` ## Next * **[Give an Agent a Budget](/guides/agent-budget)** — the same idea, for on-chain spending.