# Cross-DEX Arbitrage Alert Detector

> Cross-DEX Arbitrage Alert Detector is a paid API for AI agents from gpt55.558686.xyz, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-13).

Detects profitable arbitrage opportunities across decentralized exchanges by comparing live V2 reserve quotes, accounting for DEX fee tiers and gas costs, with reverse round-trip profitability checks.

## Facts

- Endpoint: POST https://gpt55.558686.xyz/cross-dex-arbitrage-alert/entrypoints/detect_arbitrage/invoke
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/cross-dex-arbitrage-alert-detector-c00f35c0
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_O3LflrPL674OnH3eARaz0

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 cross-dex-arbitrage-alert-detector-c00f35c0 -d '<json body>'
```

Example prompt: Check if there's a profitable arbitrage opportunity for the WETH/USDC pair right now between Uniswap V2 and SushiSwap, factoring in their fee tiers and current gas costs, and run the reverse round-trip check too.

## When to prefer this

Choose this endpoint when you need real-time, gas-adjusted cross-DEX arbitrage detection with reverse round-trip validation across Uniswap V2-style AMMs, especially when you need fee-tier-aware profitability rather than a simple price comparison.

## Known failure modes

- Stale or unavailable reserve quotes result in inaccurate spread calculations
- Gas price spikes may render all detected opportunities unprofitable
- Invalid or unsupported token pair returns an error
- Pool address not found on specified DEX returns a lookup failure
- Network congestion causes latency that invalidates real-time quotes

## How this service works

Detect cross-DEX token price spreads using live V2 reserve quotes, DEX fee tiers, gas costs, and reverse round-trip profitability checks.

## Output

Returns detected price spreads between DEX pairs, estimated profitability after accounting for DEX fee tiers and gas costs, and a reverse round-trip check indicating whether the arbitrage is genuinely profitable in both directions.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method",
    "bodyType",
    "body"
   ],
   "properties": {
    "body": {
     "type": "object",
     "additionalProperties": true
    },
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "POST",
      "PUT",
      "PATCH"
     ],
     "type": "string"
    },
    "bodyType": {
     "enum": [
      "json",
      "form-data",
      "text"
     ],
     "type": "string"
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "additionalProperties": true
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/cross-dex-arbitrage-alert-detector-c00f35c0/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from gpt55.558686.xyz](https://www.zero.xyz/host/gpt55.558686.xyz/llms.txt)