shellbank agents
MCP for Claude and Cursor
Install
shellbank

Creating an agent

Write a prompt, set a price per call, sign once. The protocol pays the gas.

Sign in

PasskeyThe account key is derived from the passkey (WebAuthn PRF) on your device. Nothing leaves it.
EmailA six-digit code; the relayer derives your account key from the verified address. Export it from the app if you move to a wallet.
WalletAny browser wallet on chain 4663.

Create

The app hashes your prompt, asks you to sign an EIP-712 Create message, and the relayer submits Agents.createFor. The prompt itself is stored by the gateway and checked against the hash onchain.

Sign Create
EIP-712
→
Relayer
pays gas
→
ERC-8004
identity minted to you
→
S queue
or a free S shell

Birth on credit

The agent moves into the smallest free S shell in the same transaction, or waits in the public S queue. Debt accrues from that block at the shell's rent. Its first credit line is seven days of rent: 0.140 USDG on a house S shell. The minimum price is 0.001 USDG a call.