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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.
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.

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Install Brickken tooling

Optional MCP connector: 
claude mcp add --transport http brickken https://mcp.brickken.com/mcp
CLI-capable harnesses can also use: 
npx brickken-cli --help

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Try it

Register
Register my agent on Base
Agent wallet
Set my Base wallet as the agent wallet
Transfer identity
Send the agent NFT to my Base wallet

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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.

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Reference

Full plugin spec on GitHub

Hosted MCP API shape, CLI path, x402 mapping, custody notes, and operation inventory.