# SilverbackDeFi Arbitrage Scanner

> SilverbackDeFi Arbitrage Scanner is a paid API for AI agents from x402.silverbackdefi.app, paid per call via x402, $0.03/call, status down (last checked 2026-09-15).

Scans DEX aggregators to find price discrepancies for a given token pair, enabling arbitrage opportunity detection

## Facts

- Endpoint: GET https://x402.silverbackdefi.app/api/v1/arbitrage-scanner
- Price: $0.03/call
- Payment: x402
- Status: down
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-silverbackdefi-app-56609dd5
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Tp44DFtTCytUgDfmOegrz

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 x402-silverbackdefi-app-56609dd5
```

Example prompt: Can you scan for price discrepancies between DEX aggregators for swapping 1000 USDC to ETH right now, so I can see if there's an arbitrage opportunity?

## When to prefer this

Use this endpoint when you need to quickly identify price discrepancies between DEX aggregators for a specific token pair on Base chain, particularly before executing a swap or arbitrage trade. Prefer this over manual price checks when you want a consolidated view of spreads across multiple aggregators in a single call.

## Known failure modes

- Missing required tokenIn or tokenOut parameters returns validation error
- Unknown or unsupported token symbol returns error or empty results
- Network congestion may cause stale quotes reducing accuracy
- Payment of 0.03 USDC not fulfilled returns 402 Payment Required
- Invalid token address format returns parsing error

## How this service works

Find price discrepancies between DEX aggregators

## Output

Returns a success flag and data object containing price discrepancies found across DEX aggregators for the specified token pair and amount, including spread percentages and quote comparisons that indicate potential arbitrage opportunities.

## Example request

```json
{
 "input": {
  "type": "http",
  "method": "GET",
  "queryParams": {
   "amount": "1000",
   "tokenIn": "USDC",
   "tokenOut": "ETH"
  }
 },
 "output": {
  "type": "json",
  "example": {
   "data": {},
   "success": true
  }
 }
}
```

## 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"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "tokenIn",
      "tokenOut"
     ],
     "properties": {
      "amount": {
       "type": "string",
       "description": "Amount to check (default: 1)"
      },
      "tokenIn": {
       "type": "string",
       "description": "Input token symbol or address"
      },
      "tokenOut": {
       "type": "string",
       "description": "Output token symbol or address"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "required": [
      "success"
     ],
     "properties": {
      "data": {
       "type": "object"
      },
      "success": {
       "type": "boolean"
      }
     }
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-silverbackdefi-app-56609dd5/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402.silverbackdefi.app](https://www.zero.xyz/host/x402.silverbackdefi.app/llms.txt)