# Uniswap v3 WETH/USDC Pool Slippage Estimator

> Uniswap v3 WETH/USDC Pool Slippage Estimator is a paid API for AI agents from auditor-x402.onrender.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-30).

Estimates price impact and slippage for a WETH/USDC trade of a given USD size on Uniswap v3, derived from on-chain concentrated liquidity pool depth.

## Facts

- Endpoint: POST https://auditor-x402.onrender.com/api/pool-slippage?utm_source=zero.xyz
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-30
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/uniswap-v3-weth-usdc-pool-slippage-estimator-a3e596d9
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ARKAGPn-XZDv2YwqA-a1y

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability uniswap-v3-weth-usdc-pool-slippage-estimator-a3e596d9 -d '<json body>'
```

Example prompt: Before I execute a $250,000 WETH/USDC swap on Uniswap v3, can you estimate the expected slippage and price impact from the on-chain pool depth?

## When to prefer this

Use this endpoint when you need a fast, on-chain slippage estimate for WETH/USDC trades on Uniswap v3 on Base before executing, especially for MEV bots, arbitrage strategies, or large institutional swaps where price impact is a key decision factor. Prefer this over spot-price-only endpoints when you need pool depth awareness, not just current price.

## Known failure modes

- Trade size outside supported range (100–5,000,000 USD) may return validation error
- On-chain RPC call failure or node unavailability may cause timeout or 5xx error
- Stale or low-liquidity pool state may produce imprecise estimates due to concentrated liquidity dynamics
- Missing or malformed tradeSizeUsd field returns bad request error
- Render.com cold start delay may add latency on first call

## How this service works

Estimated price impact / slippage for a WETH/USDC trade of a given USD size on Uniswap v3, from on-chain pool depth. Order-of-magnitude signal (v3 is concentrated liquidity), useful for MEV/execution bots before trading.

## Output

Returns an estimated slippage percentage and price impact for a WETH/USDC trade of the specified USD size, computed from on-chain Uniswap v3 concentrated liquidity pool depth. Provides an order-of-magnitude signal useful for pre-trade execution decisions.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "tradeSizeUsd": {
   "type": "number",
   "description": "Trade size in USD, 100-5,000,000 (default 10000)"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/uniswap-v3-weth-usdc-pool-slippage-estimator-a3e596d9/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from auditor-x402.onrender.com](https://www.zero.xyz/host/auditor-x402.onrender.com/llms.txt)