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Base DEX Swap Quote
x402
Base DEX Swap Quote is a paid API for AI agents from x402.agentindex.world, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-11).
Returns a best-price DEX swap quote on Base by comparing Uniswap v2, Uniswap v3, and Aerodrome via on-chain Multicall3, including amount received, optimal path, and price impact.
Price / call$0.003
Success—
StatusUnknown
How this service works
Slippage estimate, swap quote, and best DEX price on Base - compares Uniswap v2, Uniswap v3, and Aerodrome on-chain via Multicall3, returns amount received, chosen path, and price impact.
Output
Returns the estimated amount of token_out received, the selected DEX and swap path that yields the best price, the price impact percentage, and a slippage estimate — all derived from on-chain data via Multicall3 aggregating Uniswap v2, Uniswap v3, and Aerodrome pools on Base.
Example use cases
Pre-trade slippage check for large swap
“Before I execute this trade, can you quote me the expected output and price impact for swapping 5000000 USDC to WETH on Base, checking Uniswap v2, Uniswap v3, and Aerodrome?”
Best DEX route finder for DeFi bot
“I want to swap 250000 USDC (0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) for cbBTC on Base — which DEX gives the best rate and what path should I use?”
Token arbitrage opportunity scan
“Get me quotes for swapping 1000000 WETH to USDC on Base across Uniswap v2, v3, and Aerodrome so I can see if there's a price discrepancy worth acting on.”
Technical details
Endpoint
GEThttps://x402.agentindex.world/base/quote?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a real-time, on-chain best-price quote for a token swap on Base that compares multiple DEX venues (Uniswap v2, Uniswap v3, Aerodrome) in a single call. It is ideal for pre-trade analysis, slippage estimation, and routing decisions before submitting a transaction. Prefer it over generic price APIs when you need actual path routing and price impact data rather than just an oracle spot price.
Side effects
- Invalid or unsupported token address returns an error or zero quote
- No liquidity path found between the two tokens across all three DEXes
- amount_in of zero or negative rejected by exclusiveMinimum constraint
- RPC or Multicall3 on-chain call failure causing a timeout or 500 error
- Token pair only exists on one DEX, limiting comparison accuracy
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| token_in | string | |
| amount_in | integer | |
| token_out | string |
Tags
x402
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