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.

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.

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

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

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

Full plugin spec on GitHub

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