> ## Documentation Index
> Fetch the complete documentation index at: https://hypernode-docs.polynode.dev/llms.txt
> Use this file to discover all available pages before exploring further.

# L4 Summary

> All markets with order counts and best bid/ask

## Endpoint

```
GET /v2/l4book/summary
```

Returns a lightweight summary of all markets with total order counts. Use this to discover which markets have the most depth before querying individual L4 books.

## Response

```json theme={null}
{
  "markets": 699,
  "total_orders": 394315,
  "height": 958200000,
  "data": [
    {
      "coin": "HYPE",
      "bid_orders": 35432,
      "ask_orders": 6462
    },
    {
      "coin": "BTC",
      "bid_orders": 33807,
      "ask_orders": 15052
    },
    {
      "coin": "@107",
      "bid_orders": 19423,
      "ask_orders": 8599
    },
    {
      "coin": "ETH",
      "bid_orders": 11490,
      "ask_orders": 6917
    }
  ]
}
```

Markets are sorted by total order count (bids + asks) descending.

## Example

```bash theme={null}
curl -H "x-api-key: YOUR_KEY" \
  "https://hyper.polynode.dev/v2/l4book/summary"
```

```python theme={null}
import requests

resp = requests.get(
    "https://hyper.polynode.dev/v2/l4book/summary",
    headers={"x-api-key": "pn_live_YOUR_KEY"}
)
data = resp.json()

print(f"{data[markets]} markets, {data[total_orders]} total orders")
for m in data["data"][:10]:
    print(f"  {m[coin]}: {m[bid_orders]} bids, {m[ask_orders]} asks")
```