# Base Chain DEX MEV & Fee-Regime Scanner

**Use case:** 

Scan top DEX pools for tokens on Base: MEV risk, fee regime, and L2 cost breakdown using the default-chain dropdown for bare 0x addresses.

## Input

```json
{
  "mode": "scan-token",
  "default_evm_chain": "base",
  "tokens": [
    "0x4200000000000000000000000000000000000006",
    "0x833589fcd6edb6e08f4c7c32d4f71b54bda02913"
  ],
  "max_pairs_per_token": 2,
  "pairs": [],
  "discover_chains": [
    "ethereum",
    "solana",
    "base"
  ],
  "discover_min_liquidity_usd": 1000000,
  "max_results": 4,
  "bar_resolution": "60",
  "enable_ai_verdict": false
}
```

## Output

```json
{
  "chain": {
    "label": "Chain",
    "format": "text"
  },
  "exchange": {
    "label": "DEX",
    "format": "text"
  },
  "token0_symbol": {
    "label": "Token0",
    "format": "text"
  },
  "token1_symbol": {
    "label": "Token1",
    "format": "text"
  },
  "pair_address": {
    "label": "Pair address",
    "format": "text"
  },
  "volume_24h_usd": {
    "label": "24h Vol (USD)",
    "format": "number"
  },
  "liquidity_usd": {
    "label": "Liquidity (USD)",
    "format": "number"
  },
  "transactions_24h": {
    "label": "24h Tx",
    "format": "number"
  },
  "mev_risk_level": {
    "label": "MEV risk",
    "format": "text"
  },
  "fee_regime_24h": {
    "label": "Fee regime",
    "format": "text"
  },
  "mev_to_total_fees_ratio_24h": {
    "label": "MEV/total fees",
    "format": "number"
  },
  "sandwich_rate_24h": {
    "label": "Sandwich rate",
    "format": "number"
  },
  "estimated_sandwich_attacks_24h": {
    "label": "Est. sandwiches/24h",
    "format": "number"
  },
  "ai_verdict": {
    "label": "AI verdict",
    "format": "text"
  },
  "fetched_at": {
    "label": "Fetched at",
    "format": "date"
  }
}
```

## About this Actor

This example demonstrates how to use [MEV Risk Scanner - DEX Sandwich + Fee Intel](https://apify.com/constructive_calm/mev-pair-scanner) with a specific input configuration. Visit the [Actor detail page](https://apify.com/constructive_calm/mev-pair-scanner) to learn more, explore other use cases, and run it yourself.