> ## Documentation Index
> Fetch the complete documentation index at: https://developer.woox.io/llms.txt
> Use this file to discover all available pages before exploring further.

# V3 API

<Update label="2025-09-21" description="">
  **Post Only Adjusted Order Now Live**

  The Post Only Adjusted Order is now supported, giving users more flexibility when providing liquidity.

  **How it works:**

  * Normal Post-Only: The order is rejected if it would cross the book and execute immediately as a taker.
  * Post Only Adjusted: Instead of rejecting, the order price is automatically adjusted so it can still rest on the book as a maker.
    * For buy orders, the price is adjusted to best ask - 1 tick.
    * For sell orders, the price is adjusted to best bid + 1 tick.

  **REST API Updates**

  * **Place Order** `POST /v3/trade/order`\
    Added param `postOnlyAdjusted`  .
  * **Place Order** `POST /v3/order`\
    Added param `postOnlyAdjusted`  .
  * **Place Order** `POST /v3/trade/order/trial`\
    Added param `postOnlyAdjusted`  .
</Update>

<Update label="2025-07-14" description="">
  **Retail Price Improvement (RPI) Now Live**

  The RPI order type is now supported across REST and WebSocket V3 APIs, enabling market makers to provide improved execution for retail flow. Key API updates include:\
  **REST API Updates**

  * **Get Instruments** `GET /v3/public/instruments`
    Added `isAllowedRpi` field to indicate whether RPI is enabled for the symbol.
  * **Market Trades** `GET /v3/public/marketTrades`\
    Added `rpi` field to response to indicate whether the trade was matched via RPI.
  * **Market Trades History** `GET /v3/public/marketTradesHistory`\
    Added `rpi` field to response to indicate whether the trade was matched via RPI.
  * **Orderbook Snapshot** `GET /v3/public/orderbook`\
    Added `rpi` field as an optional request parameter to get the order book with both non-RPI and RPI.
  * **Place Order** `POST /v3/trade/order`\
    Now supports submitting orders with the `RPI` order type.
  * **Get Orders** `GET /v3/trade/orders`\
    Supports filtering by `RPI` order type.
  * **Transaction by Trade ID (Last 3 Months)** `GET /v3/trade/transaction`\
    Added `isMatchRPI` field to response to indicate whether the trade was matched via RPI.
  * **Transaction History (Past 2 Years)** `GET /v3/trade/transactionHistory`
    Added `isMatchRPI` field to response to indicate whether the trade was matched via RPI.

  **WebSocket API Updates**

  * **Orderbook Update (RPI)**
    New topic providing order book updates that include both RPI and non-RPI orders.
  * **Best Bid/Offer (RPI)**
    New topic broadcasting BBO updates, including both RPI and non-RPI quotes.
  * **Trade Topic**
    Added `rpi` field to messages to indicate whether the trade was matched via RPI.
  * **Execution Report**
    Added `rpi` field to messages to indicate whether the trade was matched via RPI.
</Update>

<Update label="2025-06-29" description="">
  **New V3 APIs Now Live**\
  The latest V3 REST and WebSocket APIs are now officially live.\
  They offer improved performance, reduced latency, and a more consistent developer experience.
</Update>