# Identity, Trust & Verification

> how an agent proves who it is

_2 of 28 · [all The Agent Protocol Atlas](/protocols)_

- [Web Bot Auth](/protocols/identity/web-bot-auth) — Cryptographically proves which agent is making a request via HTTP Message Signatures — because a User-Agent string can be forged and a signature cannot.
- [ERC-8004](/protocols/identity/erc-8004) — An Ethereum standard adding on-chain Identity, Reputation and Validation registries so agents can be discovered and trusted across organizational boundaries — a trust layer that extends A2A.