# How-to guides

> Task-focused recipes for sellers, agents and apps: add a warranty, pay only bonded services, file a claim, choose predicates, rotate keys, unbond, read a bond, run the scenarios.

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

Each guide assumes you have read the [getting started](https://lopw.com/docs/getting-started.html) track for your role. Code uses the real SDK and API names.

- [Add a warranty to an x402 API](https://lopw.com/docs/guides/add-warranty.html): The seller checklist from key to first bonded 402.
- [Make an agent pay only bonded services](https://lopw.com/docs/guides/bonded-only.html): Policy fields, what the SDK refuses on its own, and how refusals surface.
- [File a claim](https://lopw.com/docs/guides/file-claim.html): From breach to payout, with the window, the outcomes and the errors.
- [Choose predicates and limits](https://lopw.com/docs/guides/predicates-limits.html): What each predicate needs from you and how to set limits you can keep.
- [Rotate a signing key](https://lopw.com/docs/guides/rotate-key.html): Retire a key without stranding a single receipt.
- [Withdraw stake safely](https://lopw.com/docs/guides/unbonding.html): Partial and full exits, the delay, cancellation, and what stays slashable.
- [Read a bond from any app](https://lopw.com/docs/guides/read-bond.html): A service's own discovery endpoint, the public API and the chain.
- [Run the scenarios yourself](https://lopw.com/docs/guides/run-scenarios.html): The demo agent, the fault modes and the scheduled catalogue.