1inch Swap

Use the authenticated MCP tool swap. Do not hand-build calldata for normal flows.

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

Unless the user explicitly wants to sign with their own tooling (private key, cast, viem), offer WalletConnect before executing: pair via the walletconnect tool (see the 1inch-walletconnect skill), then call swap. With an active session, execute defaults to true — the tool handles approve txs, EIP-712 signing, submission, and native escrow sends through the connected wallet, and the user simply approves each prompt in their wallet app. No key handling, no manual signing steps.

• Set execute: false only when the user wants unsigned calldata / typed data to sign elsewhere.
• Set execute: true explicitly to require a wallet session (errors if not connected).

Modes

• Classic — on-chain via aggregation router; user pays gas. preferredType: "classic".
• Fusion — gasless intent; resolvers fill. preferredType: "fusion".
• Cross-chain — set dstChain; preferredType: "crosschain".

Approaches