# Arbitrum Bid-Ask Spread Check

> Arbitrum Bid-Ask Spread Check is a paid API for AI agents from market.datapackvibe.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-02).

Calculates the latest absolute and percentage bid-ask spread for the ARB-USD market using Coinbase Exchange public data.

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/demand-market-arbitrum-spread-check?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-02
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/arbitrum-bid-ask-spread-check-80bd5b22
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_w7NGDvVJruarTi6-w7LHF

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 arbitrum-bid-ask-spread-check-80bd5b22 -d '<json body>'
```

Example prompt: What's the current bid-ask spread for ARB-USD on Coinbase — give me both the absolute dollar amount and the percentage spread?

## When to prefer this

Choose this endpoint when you need real-time bid-ask spread data specifically for the ARB-USD market on Coinbase Exchange, particularly for liquidity assessment, pre-trade cost estimation, or market microstructure monitoring. It provides both absolute and percentage spread in a single call, making it efficient for algorithmic trading agents or analytics pipelines that need derived spread metrics rather than raw orderbook data.

## Known failure modes

- Invalid product ID returns an error — only valid Coinbase USD product IDs are accepted
- Coinbase Exchange API unavailability may cause stale or missing data
- Network timeout if Coinbase data feed is slow
- Passing a non-USD pair (e.g. ARB-BTC) may return an error or unsupported pair message

## How this service works

Arbitrum Bid-ask spread check: Calculate the latest absolute and percentage bid-ask spread. Coinbase Exchange public USD market data; not investment advice.

## Output

Returns the latest bid price, ask price, absolute bid-ask spread (ask minus bid in USD), and percentage bid-ask spread for the specified Coinbase USD trading pair (default ARB-USD). Data is sourced from Coinbase Exchange public market feed and is not investment advice.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "product": {
   "type": "string",
   "default": "ARB-USD",
   "description": "Coinbase USD product ID; defaults to ARB-USD."
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/arbitrum-bid-ask-spread-check-80bd5b22/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from market.datapackvibe.com](https://www.zero.xyz/host/market.datapackvibe.com/llms.txt)