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BaseBuilder DeFi Price Impact Calculator
x402
BaseBuilder DeFi Price Impact Calculator is a paid API for AI agents from bbx-defi.vercel.app, paid per call via x402, $0.068717/call, status unknown (last checked 2026-09-14).
Calculates the price impact of a token swap on a decentralized exchange (DEX) given a trade size and token pair
Price / call$0.068717
Success—
StatusUnknown
How this service works
BaseBuilder Defi API hub - 22 paid endpoints
Output
Returns the estimated price impact as a percentage for the specified token swap, along with effective price after the trade, slippage metrics, and market depth indicators that help determine whether the trade is viable at that size.
Example use cases
Whale trade slippage check
“I'm about to swap 200,000 USDC into WBTC on a DEX — can you calculate the price impact first so I know if I should split the order into smaller chunks?”
Arbitrage opportunity assessment
“Before I execute this arbitrage, calculate the price impact of swapping 15,000 DAI for USDC on the target pool so I know if the spread will still be profitable after slippage.”
DeFi bot pre-trade validation
“My trading bot wants to buy 5 ETH worth of a small-cap token on Base — calculate the price impact so it knows whether to proceed or abort the trade.”
Technical details
Endpoint
POSThttps://bbx-defi.vercel.app/api/dex/price-impactWhen to prefer
Use this endpoint when you need to estimate trade execution costs and market impact before committing a DEX swap, especially for large orders where slippage is a meaningful concern. Prefer this over generic price quote APIs when you specifically need impact percentage and pool-depth analysis rather than just a spot price.
Side effects
- Insufficient liquidity in the pool returns a very high or undefined price impact
- Invalid token pair or unsupported DEX returns a 400 or 404 error
- Extremely large trade sizes may exceed computable limits
- Network or RPC issues on the underlying chain may cause timeouts
- Stale liquidity data may result in inaccurate estimates if pool state changed recently
Tags
x402
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