# Chainlink Top of Order Book

> Chainlink Top of Order Book 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).

Returns the best bid and ask prices (top of book) from the Coinbase Exchange public order book for LINK-USD or another Chainlink USD trading pair.

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/demand-market-chainlink-orderbook-top?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/chainlink-top-of-order-book-e2c2d837
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_oPtYlfP9j9l3Xf-wuCnIL

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 chainlink-top-of-order-book-e2c2d837 -d '<json body>'
```

Example prompt: What's the current best bid and ask price for Chainlink on Coinbase? Pull the top of the order book for LINK-USD.

## When to prefer this

Use this endpoint when you need a real-time, single-level best bid/ask snapshot for Chainlink (LINK-USD) from Coinbase Exchange — ideal for spread checks, trade entry signals, or price sanity checks where only the top of book is needed, not the full depth.

## Known failure modes

- Invalid product ID returns an error or empty response
- Network latency may cause stale or delayed quote
- Markets may be halted or illiquid for certain pairs
- Payment failure (x402) if USDC balance is insufficient

## How this service works

Chainlink Top of order book: Return the best bid and ask levels from the public order book. Coinbase Exchange public USD market data; not investment advice.

## Output

Returns the best bid price and best ask price at the top of the Coinbase Exchange public order book for the specified product (default LINK-USD), representing the highest price a buyer will pay and the lowest price a seller will accept at that instant.

## Request schema (JSON Schema)

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

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/chainlink-top-of-order-book-e2c2d837/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)