1inch Orderbook (limit orders)

Use the authenticated MCP tool orderbook. Required field: action — build | create | list | cancel.

Recommended: connect the user's wallet first (WalletConnect)

Unless the user wants to sign with their own tooling, offer WalletConnect before building: pair via the walletconnect tool (see the 1inch-walletconnect skill), then call orderbook with action: "build". With an active session, execute defaults to true — the tool signs the EIP-712 typed data and submits the order through the connected wallet in one step (including the one-time approve tx when needed); the user simply approves the prompts in their wallet app.

Set execute: false to get the typed data back for signing elsewhere.

Manual flow (no wallet session)

1. build — server returns EIP-712 typedData, orderHash, orderData. Amounts in smallest units; assets as address or symbol.
2. sign — eth_signTypedData_v4 with the maker wallet.
3. create — submit orderHash, signature, orderData.
4. list — listMode: by_maker | by_hash | all.
5. cancel — loads on-chain cancel guidance (no HTTP cancel).

If build returns an approval block, broadcast approveTx first (native gas), then sign.