Agent Kiosk DeFi Swap & Cross-Chain Bridge Calldata Builder

x402

Agent Kiosk DeFi Swap & Cross-Chain Bridge Calldata Builder is a paid API for AI agents from agent-kiosk.vercel.app, paid per call via x402, $0.05/call, status unknown (last checked 2026-10-18).

Computes the optimal DEX/bridge route via LI.FI and ParaSwap and returns ready-to-sign EVM transaction calldata (to, data, value, gasLimit) for token swaps and cross-chain bridges across Base, Ethereum, Arbitrum, Polygon, and Optimism.

Price / call$0.05

Seller volume →—

Success—

StatusUnknown

How this service works

Executable DeFi Swap & Cross-Chain Bridge Action Calldata Builder (LI.FI + ParaSwap): computes best DEX/Bridge route and returns ready-to-sign EVM transaction calldata (to, data, value, gasLimit) on Base, Ethereum, Arbitrum, Polygon, and Optimism.

Output

Returns a JSON object containing the aggregator used (e.g. 'lifi'), the action type (DEX_SWAP_CALLDATA or bridge variant), source and destination chain IDs, and a transaction_request object with the contract address (to), encoded calldata (data), ETH value (value), and gas limit — everything needed to sign and broadcast the transaction on-chain.

Example use cases

Cross-chain bridge for yield farming

“Build me the transaction calldata to bridge 500 USDC from Ethereum to Arbitrum so I can deposit into a yield pool — my wallet is 0xDead...Beef.”

Single-chain DEX swap on Polygon

“I want to swap 100 USDC for MATIC on Polygon — give me the best route and the signed-ready calldata so I can execute it with my wallet 0x1234...5678.”

Automated bot token rebalance on Base

“My rebalancing bot needs to swap 50 AERO for cbBTC on Base — fetch the optimal LI.FI route and return the full transaction calldata including gas limit.”

Technical details

Endpoint

POSThttps://agent-kiosk.vercel.app/v1/defi-swap-quote?utm_source=zero.xyz

When to prefer

Choose this endpoint when an AI agent or automated workflow needs executable, ready-to-sign EVM transaction calldata for token swaps or cross-chain bridges — not just price quotes. It is ideal when you need multi-aggregator best-routing (LI.FI + ParaSwap) across Base, Ethereum, Arbitrum, Polygon, and Optimism without building your own aggregator integration. Prefer it over raw DEX APIs when you need a single endpoint that handles both same-chain swaps and cross-chain bridges.

Side effects

Unsupported token pair or low liquidity — no route found, returns error
Invalid chain enum value — returns validation error
Amount too small for bridge minimum — route unavailable
Wallet address malformed — validation error
Aggregator API (LI.FI/ParaSwap) temporarily unavailable — upstream timeout
Insufficient gas estimation data — gasLimit may be absent

Input

Schema · Request body

Field	Type	Description
amount	string	Amount to swap (human-readable e.g. '10' or atomic units)
wallet	string	Optional 0x sender wallet address
to_chain	string
to_token	string	Destination token symbol (ETH, USDC, AERO, cbBTC) or 0x address
from_chain	string
from_token	string	Source token symbol (USDC, ETH, AERO) or 0x address

Output

Schema · Response

{
  "type": "json",
  "example": {
    "aggregator": "lifi",
    "action_type": "DEX_SWAP_CALLDATA",
    "to_chain_id": 8453,
    "from_chain_id": 8453,
    "transaction_request": {
      "to": "0x1231DEB6f5749EF6cE6943a275A1D3E7486F4EaE",
      "data": "0x...",
      "value": "0x0"
    }
  }
}

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