# ArbiPulse Spread Tick

> ArbiPulse Spread Tick is a paid API for AI agents from arbipulse.vercel.app, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-13).

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

## Facts

- Endpoint: GET https://arbipulse.vercel.app/api/spread-tick
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/arbipulse-spread-tick-b8508dc4
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_v4cVRbtf6_j4bS_11kObM

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-spread-tick-b8508dc4
```

Example prompt: Check the live spread for BTC/USDT across Binance, Coinbase, Kraken, and Bybit and tell me whether there's a tradeable arbitrage opportunity right now.

## When to prefer this

Use this endpoint when you need a fast, cheap ($0.02) single-tick spread check across the four major CEXs for arbitrage monitoring loops. Prefer this over the full /api/crypto endpoint ($0.07) when you only need bid/ask venue and spread in bps with a TRADE/THIN/NONE verdict and do not need fee breakdowns or transfer path details.

## Known failure modes

- Pair not supported — returns error indicating the trading pair is unavailable
- Exchange data feed timeout — one or more exchange feeds may be stale beyond 30s window
- Invalid pair format — malformed ticker symbol returns a 400-level error
- Rate limiting — excessive polling may trigger throttling

## 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 verdict of TRADE (actionable spread), THIN (marginal), or NONE (no opportunity) for the requested pair. Data is at most 30 seconds stale and is computed without any LLM in the path.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema"
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/arbipulse-spread-tick-b8508dc4/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from arbipulse.vercel.app](https://www.zero.xyz/host/arbipulse.vercel.app/llms.txt)