---
title: "Get market impact price"
method: GET
path: "/orderbook/{market}/impact-price"
tags: ["Markets"]
---

# Get market impact price

`GET /orderbook/{market}/impact-price`

## Request

- Base URL: `https://api.prod.paradex.trade/v1`
- URL: `https://api.prod.paradex.trade/v1/orderbook/{market}/impact-price`
- Auth: none declared

## Path parameters

- `market` string, required

## Query parameters

- `size` integer, required

## Response `200`

OK

- ResponsesImpactPriceResp
  - `impact_price` string: The calculated impact price
  - `market` string: Symbol of the market
  - `side` string: Trade side (BUY or SELL)
  - `size` string: Size of the order

## Other responses

- `400`: Bad Request

## Changes

- **2026-10-22** `f33feb7333ea`: 3 warning
  - added the new `ADDRESS_BOOK_NOT_PARADEX_ACCOUNT` enum value to the `error/allOf[#/components/schemas/responses.ErrorCode]/` response property for the response status `400`
  - added the new `ADDRESS_BOOK_REPEATED_IN_IMPORT` enum value to the `error/allOf[#/components/schemas/responses.ErrorCode]/` response property for the response status `400`
  - added the new `STARKNET_PARENT_ONBOARDING_DISABLED` enum value to the `error/allOf[#/components/schemas/responses.ErrorCode]/` response property for the response status `400`
- **2026-10-20** `72c125c93c2b`: 2 warning
  - added the new `SESSION_EXPIRED` enum value to the `error/allOf[#/components/schemas/responses.ErrorCode]/` response property for the response status `400`
  - added the new `SESSION_REVOKED` enum value to the `error/allOf[#/components/schemas/responses.ErrorCode]/` response property for the response status `400`
- …earlier changes not shown

[Operation history](https://skmtc.dev/tradeparadex/apis/paradex-rest-api-2/changes/orderbook/:market/impact-price/get.md)

---

[API](https://skmtc.dev/tradeparadex/apis/paradex-rest-api-2.md) - [All operations](https://skmtc.dev/tradeparadex/apis/paradex-rest-api-2/llms.txt) - [OpenAPI document](https://skmtc.dev/tradeparadex/apis/paradex-rest-api-2/revisions/f33feb7333ea?raw)