---
title: "Get Book"
method: GET
path: "/v1/info/book"
---

# Get Book

`GET /v1/info/book`

Get book for an instrument.

## Query parameters

- `instrument_id` integer, required — Instrument ID
- `depth` 10 | 100 | 500 | 1000 — Number of book levels to return

## Response `200`

Book response.

- Book
  - `instrument_id` integer, required — Instrument ID
  - `bids` Level[], required — Bid levels
    - string[] — - `"100.00"` - Price - `"10.00"` - Quantity
  - `asks` Level[], required — Ask levels
    - string[] — - `"100.00"` - Price - `"10.00"` - Quantity
  - `timestamp` integer, required — Timestamp in milliseconds
  - `sequence` integer, required — Sequence number

## Other responses

- `400` — Bad request — the request was malformed or failed validation (bad query parameters, unparseable body, invalid signature, or a domain pre-check). The `error` field is a human-readable validation detail.
- `429` — Too Many Requests. `error` distinguishes the limit that was hit: `ip_rate_limited` (per-IP token bucket), `action_rate_limited` (per-account action rate), or `open_orders_limit` (resting open-order cap).
- `500` — Internal server error. `error` is `internal_error`.

---

[API](https://skmtc.net/polymarket/apis/polymarket-perps-http-api.md) · [All operations](https://skmtc.net/polymarket/apis/polymarket-perps-http-api/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/polymarket/polymarket-perps-http-api/revisions/76e4e47cf3aa/schema)