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

# Overview

> Ondo Perps provider — SIWE session signing, HMAC-relayed trading, setup, and configuration

This section covers Ondo-specific behavior that goes beyond the generic SDK documentation. For general concepts, see the [Concepts](/concepts/action-pattern) section.

Ondo Perps authenticates trading with a **Sign-In-With-Ethereum (SIWE)** session. After a one-time wallet sign-in the SDK holds a venue session credential and a venue **API key**, both kept client-side. Trading actions are unsigned venue requests the SDK **HMAC-signs** with that API key before the backend relays them to the venue (see [Signing Model](/providers/ondo/signing-model)).

## Topics

* [Signing Model](/providers/ondo/signing-model) — The SIWE session, the HMAC-signed trading relay, and the client-only session steps
* [Setup](/providers/ondo/setup) — SIWE login, deposit-address provisioning, terms acceptance, trading-key creation, and referral
* [Trading](/providers/ondo/trading) — All trading actions with parameters and Ondo's order constraints
* [WebSocket Protocol](/providers/ondo/websocket) — The native WebSocket endpoint and how the SDK discovers it

## Defaults & assumptions

* **Margin mode:** cross only. Passing `marginMode: ISOLATED` on `placeOrder` / `updateLeverage` is rejected.
* **Order types:** `LIMIT` and `MARKET` only. `price` is required for a limit order and is validated on the market's price grid; `size` is validated on the size grid.
* **Time-in-force:** `GTC`, `IOC`, and `POST_ONLY` (post-only submits as `GTC` with the post-only flag set).
* **Order expiry:** not supported — `expiresAt` must be omitted.
* **Trigger legs:** take-profit / stop-loss execute at market; a `limitPrice` on a trigger is rejected.
* **Quote asset:** USDC. The provider advertises a single trading category (`ondo`).
* **Deposits:** `getDepositFlow()` provisions a per-user Ethereum USDC margin-wallet address behind the SIWE session; route to the returned `toAddress`.

## Leverage

Ondo markets are cross-margin only. The maximum leverage is **10x** by default, and **20x** for index, commodity, and equity markets — `US100`, `US500`, `XAU`, `XAG`, `WTI`, and `AAPL`. The maintenance margin rate is half the initial rate at maximum leverage.

## Candle intervals

The provider advertises these OHLCV intervals in `supportedIntervals`: `1m`, `5m`, `15m`, `1h`, `4h`, `1d`, `1w`. Requesting any other interval raises a validation error.

## Related Pages

* [Concepts](/concepts/action-pattern) — The action pattern, streaming, and multi-provider support
* [SDK / Streaming](/sdk/streaming) — Subscribe to live market data and user events via WebSocket
* [SDK / Account](/sdk/account/get-account) — Fetch account balances, positions, and fills
* [SDK / Trading](/sdk/trading/placing-orders) — Place orders, cancel orders, and query order status
* [SDK / Actions](/sdk/actions) — The create -> sign -> execute pattern for all operations