# How to Get the Full Steam Community Market Orderbook

> `GET /v1/market/steam/latest` returns full-depth Steam bid and ask ladders for every tracked regular item, including top-of-book prices and quantity at each level.

Top-of-book only prices the first available level. Full depth is what makes multi-unit average fill, visible liquidity, and slippage calculations possible.

## Steam orderbook structure

Each item is keyed by exact `market_hash_name` and contains `updated_at`, `collected_at`, `top`, and `depth`.

`top` holds best `ask` and `bid` plus total `ask_volume` and `bid_volume` order counts. `depth` holds:

| Field | Meaning |
| --- | --- |
| `ask_levels`, `bid_levels` | Number of price levels |
| `asks.prices`, `asks.volumes` | Ask ladder, prices ascending |
| `bids.prices`, `bids.volumes` | Bid ladder, prices descending |

At each index, `prices[i]` pairs with `volumes[i]`. The quantity is available at that exact level and is not cumulative.

## Use depth for fill and slippage

Fetch the full `GET /v1/market/steam/latest` snapshot and select the exact item. The response is roughly 100 MB before compression and requires gzip. It is available on all plans.

To estimate a buy fill, walk ask levels from the lowest price upward until the target quantity is reached. Divide total visible cost by filled quantity for average fill. Compare that average with `top.ask` to calculate visible slippage. A sell-side calculation walks bids from highest downward.

Liquid items refresh every 10 minutes and other items every 60 minutes. Liquidity classification comes from `GET /v1/liquidity/items`.

## Applicable endpoints

| Endpoint | Returns | Plans |
| --- | --- | --- |
| `GET /v1/market/steam/latest` | Latest full-depth orderbooks | All plans |
| `POST /v1/market/steam/history` | Historical full-depth snapshots | Scale, Enterprise |
| `POST /v1/archive/steam` | Median completed-sale price and volume | Scale, Enterprise |

## Orderbook boundaries

- The dedicated snapshot contains regular items only. Doppler phases and Case Hardened tiers are not included.
- Visible orders can be canceled before execution, so ladder slippage is an estimate from observed intent.
- `top.ask_volume` and `top.bid_volume` are total order counts. They are different from per-level quantities.
- Use `collected_at` for collection freshness and `updated_at` for the selected Steam observation time.
- Steam prices represent wallet value and do not include a cash-conversion field.

The [Steam latest orderbook reference](/docs/api-reference/market-steam-latest) documents the columnar arrays.