# ArbiPulse Cross-Exchange Spread Tick

> ArbiPulse Cross-Exchange Spread Tick is a paid API for AI agents from arbipulse.theaslangroupllc.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-14).

Returns the live executable bid/ask spread for a crypto pair across Binance, Coinbase, Kraken, and Bybit with a deterministic TRADE/THIN/NONE verdict in a single cheap call.

## Facts

- Endpoint: GET https://arbipulse.theaslangroupllc.com/api/spread-tick
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/arbipulse-cross-exchange-spread-tick-f97a8488
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_YSn-DKhOdW5fQEAT3IJij

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 arbipulse-cross-exchange-spread-tick-f97a8488
```

Example prompt: What's the live spread for BTC/USDT across Binance, Coinbase, Kraken, and Bybit right now — is there a TRADE signal or is it too thin?

## When to prefer this

Use this endpoint when you need a fast, cheap ($0.02) snapshot of cross-exchange spread conditions to decide whether to escalate to a full arbitrage analysis. Ideal for high-frequency monitoring loops where you poll spread viability before committing to more expensive computations. Prefer this over the full /api/crypto endpoint when you only need a binary TRADE/THIN/NONE signal without fee breakdowns or transfer path details.

## Known failure modes

- Unsupported trading pair returns an error or empty result
- Stale data if an exchange feed is temporarily down
- Payment failure if USDC balance is insufficient for the $0.02 fee
- Rate limiting if the monitoring loop calls too frequently

## How this service works

Cross-exchange spread tick — ONE $0.02 call returns the live executable spread for a pair across Binance, Coinbase, Kraken, Bybit: best bid venue, best ask venue, spread in bps, and a deterministic TRADE / THIN / NONE verdict. Built for arbitrage monitoring loops; escalate to /api/crypto ($0.07) for the full CEX arbitrage read with fees and transfer paths. 30s freshness, no LLM in the path.

## Output

Returns the best bid venue, best ask venue, spread in basis points, and a deterministic TRADE / THIN / NONE verdict for the requested pair across Binance, Coinbase, Kraken, and Bybit. Data is refreshed every 30 seconds with no LLM processing in the path.

## 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",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {
      "pair": {
       "type": "string"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "errors": {
     "type": "object",
     "description": "Documented error responses, keyed by HTTP status code",
     "additionalProperties": {
      "type": "object",
      "required": [
       "description"
      ],
      "properties": {
       "example": {
        "type": "object"
       },
       "description": {
        "type": "string"
       }
      }
     }
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "pair": "BTC/USDT",
  "buy_at": {
   "ask": 118211.1,
   "exchange": "Kraken"
  },
  "sell_at": {
   "bid": 118260.8,
   "exchange": "Binance"
  },
  "verdict": "THIN",
  "deep_read": "https://arbipulse.vercel.app/api/crypto ($0.07)",
  "spread_bps": 4.2
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/arbipulse-cross-exchange-spread-tick-f97a8488/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from arbipulse.theaslangroupllc.com](https://www.zero.xyz/host/arbipulse.theaslangroupllc.com/llms.txt)