> ## Documentation Index
> Fetch the complete documentation index at: https://docs.base.org/llms.txt
> Use this file to discover all available pages before exploring further.

# Brickken

> ERC-8004 identity, reputation, and agent-token operations through Brickken with Base MCP x402 approval.

Brickken provides ERC-8004 identity, reputation, and agent-token operations. The plugin prepares operations through Brickken MCP tools, the hosted Brickken MCP HTTP API, or the Brickken CLI, then uses Base MCP for x402 approval and completion.

**Chains:** Base mainnet and Base Sepolia.

**Operations:** agent registration, identity updates, reputation operations, agent wallet changes, agent token operations, and ownership transfer.

<Tip>
  Brickken initially operates in `brickken-relayed` mode. Changing the agent wallet only changes the operational wallet; transferring the ERC-721 identity requires an explicit ownership transfer.
</Tip>

## Install Brickken tooling

Optional MCP connector:

```bash theme={null}
claude mcp add --transport http brickken https://mcp.brickken.com/mcp
```

CLI-capable harnesses can also use:

```bash theme={null}
npx brickken-cli --help
```

## Try it

```text Register theme={null}
Register my agent on Base
```

```text Agent wallet theme={null}
Set my Base wallet as the agent wallet
```

```text Transfer identity theme={null}
Send the agent NFT to my Base wallet
```

## Pattern

Brickken prepare surfaces return a `txId`, transactions, and x402 requirements. The assistant maps the quoted price to `initiate_x402_request.maxPayment`, sends the `txId` and prepared transactions in the x402 request body, waits for Base Account approval, then calls `complete_x402_request`.

Brickken's relayer is the onchain sender; the Base Account is the x402 payer.

## Reference

<Card title="Full plugin spec on GitHub" icon="github" href="https://github.com/base/skills/blob/master/skills/base-mcp/plugins/brickken.md">
  Hosted MCP API shape, CLI path, x402 mapping, custody notes, and operation inventory.
</Card>