---
title: "Get Max Order Size"
method: GET
path: "/v1/perps/max_order_size"
tags: ["Margin Account"]
---

# Get Max Order Size

`GET /v1/perps/max_order_size`

Get a summary of the maximum order size that can be placed given the current state of the order book and available margin. For how size limits are determined, see [Position size limits](/maximum-position-sizes).

## Query parameters

- `market` string, required
- `buffer` string

## Response `200`

Maximum order sizes

- object
  - `success` boolean, required — Whether the request was successful
  - `error` string — Error message, present only on failure
  - `error_code` string — Semantic error code. See each endpoint's error responses for the specific codes it can return.
  - `deprecated` string — Deprecation notice, if applicable
  - `result` MaxOrderSizesRes
    - `percent100` OrderSizes, required
      - `maxBidBaseSize` string, required — Allowed buy order size in base asset
      - `maxAskBaseSize` string, required — Allowed ask order size in base asset
    - `percent75` OrderSizes, required
      - `maxBidBaseSize` string, required — Allowed buy order size in base asset
      - `maxAskBaseSize` string, required — Allowed ask order size in base asset
    - `percent50` OrderSizes, required
      - `maxBidBaseSize` string, required — Allowed buy order size in base asset
      - `maxAskBaseSize` string, required — Allowed ask order size in base asset
    - `percent25` OrderSizes, required
      - `maxBidBaseSize` string, required — Allowed buy order size in base asset
      - `maxAskBaseSize` string, required — Allowed ask order size in base asset

## Other responses

- `400` — Bad request. The request was malformed or failed validation.
- `401` — Authentication required. Provide a valid JWT or API key.
- `403` — Access denied. The authenticated account does not have permission.
- `429` — Rate limit exceeded. Slow down request frequency.
- `500` — Internal server error.

---

[API](https://skmtc.dev/ondoperps/apis/ondo-perps-rest-api.md) · [All operations](https://skmtc.dev/ondoperps/apis/ondo-perps-rest-api/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/ondoperps/ondo-perps-rest-api/revisions/39df6b2fa672/schema)