# Stacks Bid-Ask Spread Check

> Stacks 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 2026-10-21).

Returns the current bid-ask spread for the Stacks (STX-USD) trading pair from Coinbase Exchange public market data.

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/pulse-market-stacks-spread-check?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-21
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/stacks-bid-ask-spread-check-b96f883b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_4H4s-QPC9RmaLRR6WD9_L

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 stacks-bid-ask-spread-check-b96f883b -d '<json body>'
```

Example prompt: What's the current bid-ask spread for Stacks (STX-USD) on Coinbase right now?

## When to prefer this

Use this endpoint when you need a quick, real-time bid-ask spread check specifically for Stacks (STX-USD) or another Coinbase USD market pair, particularly for pre-trade analysis, liquidity assessment, or spread monitoring in automated trading workflows.

## Known failure modes

- Invalid product ID returns an error or empty response
- Coinbase Exchange API downtime may cause retrieval failure
- Non-USD product IDs may not be supported
- Stale or delayed data during periods of market volatility

## How this service works

Stacks Bid-ask spread check: Bid-ask spread check for Stacks (STX-USD) from Coinbase Exchange public USD market data. The product ID can be overridden; data only, not investment advice.

## Output

Returns real-time bid and ask prices and the calculated bid-ask spread for the specified Coinbase USD product (defaulting to STX-USD), sourced from Coinbase Exchange public market data.

## Request schema (JSON Schema)

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

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/stacks-bid-ask-spread-check-b96f883b/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)