# Make an agent pay only bonded services

> Configure the buyer policy so an agent refuses unbonded, under-staked or under-covered sellers before any money moves, and handle refusals.

*LOPW documentation · Guides.* Canonical page: https://lopw.com/docs/guides/bonded-only.html · This Markdown twin: https://lopw.com/docs/guides/bonded-only.md · Index of all pages: https://lopw.com/llms.txt · Everything in one file: https://lopw.com/llms-full.txt

The buyer policy is checked against live on-chain data before every payment. If it fails, the SDK aborts the x402 payment: the seller never receives a request to serve and no transaction is made.

| Policy field | Meaning | Suggested starting point |
| --- | --- | --- |
| `requireWarranty` | Refuse sellers that offer no LOPW warranty at all | `true` (the default) |
| `minStake` | Least stake the service must hold, in 7-decimal units | At least what a day of your calls could be worth in claims |
| `requiredPredicates` | Predicate IDs the terms must include | `[3]` for data feeds, `[6]` for prices, `[4, 5]` for anything you pay per byte |
| `minMaxClaim` | Least a single receipt must be able to pay out | At least the price of the call, usually more |

```ts
const agent = new LopwBuyer({
  secret: process.env.AGENT_SECRET,
  policy: { minStake: 100n * 10_000_000n, requiredPredicates: [6], minMaxClaim: 10_000_000n },
});

try {
  const { warranty } = await agent.fetch(url);
} catch (e) {
  // A policy refusal surfaces as an aborted x402 payment whose reason is the WarrantyRefused message,
  // e.g. "stake below policy minimum", "service is Suspended", "warranty lacks predicate P6".
}
```

Independently of the policy, the SDK only pays a service that is `Active`, under its *current* terms, with a valid, unexpired offer whose price and asset match the x402 requirements and which it has not paid before.

> **Watch the stake, not just the state**
>
> A service stays `Active` while stake is at or above its own `min_stake`, which may be as low as 100 USDC. If many agents could claim at once, later claims find less stake. `minStake` and `minMaxClaim` are how your agent prices that risk; the [economics](https://lopw.com/docs/deep-dive/economics.html) page works through it.