# Guides

Agent Wallet Index has 4 guides on agent wallets and agent payment rails, grouped by country.

## United States

- [Agent payments in the United States](https://agentwalletindex.fyi/guides/agent-payments-in-the-united-states.md): Which listing fields to read first when an agent wallet or payment rail will serve US users: rail, custody, KYC, approval and status. This index does not give legal advice.

## General

- [Common mistakes with agent wallets and questions to ask](https://agentwalletindex.fyi/guides/common-mistakes-with-agent-wallets.md): Mistakes to avoid when you pick an agent wallet: choosing before you know your agent's spend pattern, ignoring the custody model, and skipping the cited source.
- [How to compare agent wallets and payment rails](https://agentwalletindex.fyi/guides/how-to-compare-agent-wallets.md): Compare agent wallets and rails on the same fields: rail, custody, spend caps, human approval, KYC, MCP support and fees. Each listing links the source for its facts.
- [What an agent wallet listing shows](https://agentwalletindex.fyi/guides/what-a-listing-shows.md): Every listing shows the same set of fields for each wallet or payment rail. Each fact links to the vendor's public docs or the protocol spec so you can check it yourself.

> **Check before you fund.** Features, fees and protocol support change. Follow the cited source on each row before you let an agent hold or spend money.