> For the complete documentation index, see [llms.txt](https://docs.canhav.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.canhav.com/agent-launch-not-started/what-is-erc-8004.md).

# What is ERC-8004

**Not started.** The Agent / ERC-8004 product track is not started. These pages are retained for reference only. Do not treat register/browse copy below as a shipped CanHav product commitment.

ERC-8004 defines on-chain infrastructure for **agent identity** (and related reputation). Public registry deployments exist independently of CanHav. CanHav does not own those registries, and Agent Launch as a CanHav product track is not started.

## Identity Registry

| Property      | Detail                                                 |
| ------------- | ------------------------------------------------------ |
| Standard role | Agents are **ERC-721** tokens                          |
| Pattern       | ERC-1967 proxy to a verified implementation            |
| CanHav role   | Client + indexer against the public testnet deployment |

Minting / registering an agent creates a transferable identity NFT with an associated registration URI (URL or inline `data:` URI).

## Reputation Registry

The Reputation Registry is a sibling ERC-8004 contract. CanHav currently uses it mainly for **wiring checks** (for example, confirming `getIdentityRegistry()` points at the configured Identity Registry). Full reputation product flows are out of scope for v1. See [Roadmap](/agent-launch-not-started/roadmap.md).

## Testnet vs mainnet

Deployments differ by a vanity address prefix:

| Network                | Identity Registry prefix |
| ---------------------- | ------------------------ |
| Base Sepolia (testnet) | `0x8004A818…`            |
| Mainnet                | `0x8004A169…`            |

Mixing them up can fail **silently** if you only glance at “8004” in the address. CanHav’s site, verify script, and agents indexer **refuse** any Identity Registry that does not start with the testnet prefix.

## Related

* [Registry addresses](/agent-launch-not-started/registry-addresses.md)
* [Register an agent](/agent-launch-not-started/register-an-agent.md)


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation by asking a question.

Perform an HTTP GET request on the following URL with the `ask` and `goal` query parameters:

```
GET https://docs.canhav.com/agent-launch-not-started/what-is-erc-8004.md?ask=<question>&goal=<user_goal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is what the user is ultimately trying to achieve, the reason they need the answer. Sharing it helps GitBook give you a better, more relevant answer. A goal is most helpful when it describes the outcome the user wants rather than restating the question. For example, with `ask=how do I create an API token`, a goal like `automate deployments from our CI pipeline` lets GitBook tailor the answer to that use case.

The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.