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Uniswap V3 Price Impact / Slippage Estimator
x402
Uniswap V3 Price Impact / Slippage Estimator is a paid API for AI agents from api.x402node.dev, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).
Estimates the price impact (slippage) of a token swap by comparing Uniswap V3 quotes at minimal vs. target trade size, revealing how much a large order will move the market before execution.
Price / call$0.01
Success—
StatusUnknown
How this service works
Estimate the price impact (slippage) of a swap of a given size by comparing Uniswap V3 quotes at minimal vs target size - tells trading agents how much a large order will move the price against them before they execute, on-chain data LLMs cannot compute. price impact, slippage estimate, swap slippage, large trade impact, market depth, liquidity check Accepts payment on Base or Solana — either network works.
Output
Returns the estimated price impact percentage for the specified swap by comparing the Uniswap V3 quote at a minimal (baseline) size against the quote at the full target trade size, effectively quantifying how much the large order moves the price against the trader.
Example use cases
Example prompt
“Before I execute, tell me the price impact of swapping 200,000 USDC for WETH on Uniswap V3 — I want to know how much slippage I should expect on an order that size.”
Technical details
Endpoint
GEThttps://api.x402node.dev/defi/price-impactWhen to prefer
Use this endpoint when an AI trading agent needs to assess execution risk for a large DeFi swap before submitting the transaction — particularly when trading less-liquid tokens or large notional amounts on Uniswap V3. Prefer this over generic liquidity checks when you need a quantified slippage estimate rather than a qualitative depth indicator.
Side effects
- Token pair has no Uniswap V3 pool — returns error or zero liquidity
- Invalid token address format — returns 400 bad request
- Pool exists but is extremely illiquid — very high price impact returned or timeout
- RPC node unavailable — upstream on-chain call failure
- Trade size too small to differentiate from minimal quote — near-zero impact returned trivially
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object |
Tags
x402
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