---
title: "Order book deltas"
method: GET
path: "/orderbooks-changes"
tags: ["WebSockets · Market data"]
---

# Order book deltas

`GET /orderbooks-changes`

## Request

- Base URL: `wss://ws.azbit.com`
- URL: `wss://ws.azbit.com/orderbooks-changes`
- Auth: none declared

Not a REST call: this is the WebSocket **handshake**. Connect to the URL below and the exchange answers
`101 Switching Protocols`; everything after that is frames, not requests.

Public: no key, no signature.

Incremental book updates for the pairs you name. Subscribe exactly as for the trade tape:

```json
{ "Method": "subscribe", "CurrencyPairs": ["BTC_USDT"] }
```

Apply the deltas to a snapshot from `/orderbooks-snapshots` or `GET /api/orderbook`. If you lose frames,
re-snapshot rather than patching a book you are no longer sure of.

## Other responses

- `101`: Switching Protocols — the socket is open.

## Changes

- **2026-10-13** `13dbac1613c4`: 1 info
  - endpoint added

[Operation history](https://skmtc.dev/binibit/apis/webapp/changes/orderbooks-changes/get.md)

---

[API](https://skmtc.dev/binibit/apis/webapp.md) - [All operations](https://skmtc.dev/binibit/apis/webapp/llms.txt) - [OpenAPI document](https://skmtc.dev/binibit/apis/webapp/revisions/13dbac1613c4?raw)