# Hedera Top of Order Book

> Hedera 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 from the Hedera (HBAR-USD) order book on Coinbase Exchange.

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/demand-market-hedera-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/hedera-top-of-order-book-83c6e309
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Ivvobd-LMDGc8TtpyjQ2P

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 hedera-top-of-order-book-83c6e309 -d '<json body>'
```

Example prompt: What's the current best bid and ask price for HBAR-USD on Coinbase right now? I want to see the top of the order book for Hedera.

## When to prefer this

Use this endpoint when you specifically need the best bid and ask levels for HBAR-USD (Hedera) from Coinbase Exchange in real time. It is ideal for trading agents that need price reference data, spread analysis, or market condition checks for Hedera without pulling the full order book depth. Prefer this over full order book endpoints when only the top price levels are needed, minimizing cost and latency.

## Known failure modes

- Invalid product ID returns an error — only Coinbase-listed USD product IDs are valid (default HBAR-USD)
- Market may be closed or illiquid, resulting in empty or stale top-of-book data
- Payment failure or insufficient USDC balance causes the request to be rejected before execution
- Network or upstream Coinbase API outage may result in a timeout or 5xx error

## How this service works

Hedera 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 top-of-book data for the specified Coinbase product, including the best (highest) bid price and quantity and the best (lowest) ask price and quantity, representing the most competitive prices currently available in the order book.

## Request schema (JSON Schema)

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

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/hedera-top-of-order-book-83c6e309/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)