# Uniswap Bid-Ask Spread Check

> Uniswap 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 Uniswap (UNI-USD) or other Coinbase USD market pairs using Coinbase Exchange public market data.

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/demand-market-uniswap-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/uniswap-bid-ask-spread-check-403f77c5
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_7aw6uXB6H0Tnw9l0gipqj

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 uniswap-bid-ask-spread-check-403f77c5 -d '<json body>'
```

Example prompt: What's the current bid-ask spread for UNI-USD right now — give me both the absolute dollar spread and the percentage spread?

## When to prefer this

Use this endpoint when you need real-time bid-ask spread data specifically for Coinbase USD-denominated crypto pairs, particularly UNI-USD, and want both absolute and percentage spread metrics in a single call. Prefer this over raw order-book endpoints when you need a quick, pre-computed spread figure for liquidity assessment without having to parse full order book data yourself.

## Known failure modes

- Invalid product ID returns an error or empty response
- Unsupported trading pair (non-USD or non-Coinbase pair) may fail or return unexpected results
- Payment failure ($0.01 USDC) results in a 402 response before data is returned
- Temporary Coinbase Exchange data unavailability may yield stale or missing spread values
- Malformed request body or missing required fields may cause a 400 error

## How this service works

Uniswap 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 absolute bid-ask spread (in USD) and the percentage bid-ask spread for the requested Coinbase USD trading pair, derived from Coinbase Exchange public market data. Intended for informational market research; not investment advice.

## Request schema (JSON Schema)

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

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/uniswap-bid-ask-spread-check-403f77c5/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)