# AscendEX (BitMax)

AscendEX exchange historical data for **all its instruments** is available since **2021-03-28**.

{% embed url="<https://api.tardis.dev/v1/exchanges/ascendex>" %}
See AscendEX historical data coverage: available symbols, channels, date ranges and incidents
{% endembed %}

### Downloadable **CSV** files

Historical CSV datasets for the first day of each month are **available to download without API key**. See [downloadable CSV files documentation](https://docs.tardis.dev/downloadable-csv-files/overview).

| data type             | symbol   | date       |                                                                                                           |
| --------------------- | -------- | ---------- | --------------------------------------------------------------------------------------------------------- |
| incremental\_book\_L2 | BTC-PERP | 2023-03-01 | [Download sample](https://datasets.tardis.dev/v1/ascendex/incremental_book_L2/2023/03/01/BTC-PERP.csv.gz) |
| trades                | BTC-PERP | 2023-03-01 | [Download sample](https://datasets.tardis.dev/v1/ascendex/trades/2023/03/01/BTC-PERP.csv.gz)              |
| derivative\_ticker    | BTC-PERP | 2023-03-01 | [Download sample](https://datasets.tardis.dev/v1/ascendex/derivative_ticker/2023/03/01/BTC-PERP.csv.gz)   |

### API Access and data format

Historical data format is the same as provided by real-time AscendEX Exchange WebSocket API v2 (<https://ascendex.github.io/ascendex-futures-pro-api-v2/#websocket>) with addition of local timestamps. If you'd like to work with **normalized data format** instead (same format for each exchange) see [downloadable CSV files](https://docs.tardis.dev/downloadable-csv-files/overview) or official [client libs](https://docs.tardis.dev/api/quickstart) that perform data normalization client-side.

{% tabs %}
{% tab title="Python" %}

```python
# pip install tardis-dev
import asyncio
from tardis_dev import Channel, replay

async def main():
    async for local_timestamp, message in replay(
        exchange="ascendex",
        from_date="2023-03-01",
        to_date="2023-03-02",
        filters=[Channel(name="depth-realtime", symbols=["BTC-PERP"])],
        api_key="YOUR_API_KEY",
    ):
        # messages as provided by Ascendex real-time stream
        print(message)

asyncio.run(main())
```

See [Python client docs](https://docs.tardis.dev/python-client/quickstart).
{% endtab %}

{% tab title="Node.js" %}

```javascript
// npm install tardis-dev
import { replay } from 'tardis-dev';

const messages = replay({
  exchange: 'ascendex',
  from: '2023-03-01',
  to: '2023-03-02',
  filters: [{ channel: 'depth-realtime', symbols: ['BTC-PERP'] }],
  apiKey: 'YOUR_API_KEY'
});

// messages as provided by Ascendex real-time stream
for await (const { localTimestamp, message } of messages) {
  console.log(localTimestamp, message);
}
```

See [Node.js client docs](https://docs.tardis.dev/node-client/quickstart).
{% endtab %}

{% tab title="cURL & HTTP API" %}

```bash
curl --compressed -g 'https://api.tardis.dev/v1/data-feeds/ascendex?from=2023-03-01&filters=[{"channel":"depth-realtime","symbols":["BTC-PERP"]}]&offset=0'
```

{% embed url="<https://api.tardis.dev/v1/data-feeds/ascendex?from=2023-03-01&filters=[{%22channel%22:%22depth-realtime%22,%22symbols%22:[%22BTC-PERP%22]}]&offset=0>" %}
Example API response for Ascendex exchange historical market data request
{% endembed %}

See [HTTP API docs](https://docs.tardis.dev/api/http-api-reference).
{% endtab %}

{% tab title="cURL & tardis-machine" %}

```bash
curl -g 'localhost:8000/replay?options={"exchange":"ascendex","filters":[{"channel":"depth-realtime","symbols":["BTC-PERP"]}],"from":"2023-03-01","to":"2023-03-02"}'
```

[Tardis-machine](https://docs.tardis.dev/tardis-machine/quickstart) is a locally runnable server that exposes API allowing efficiently requesting historical market data for whole time periods in contrast to [HTTP API](https://docs.tardis.dev/api/http-api-reference) that provides data only in minute by minute slices.

See [tardis-machine](https://docs.tardis.dev/tardis-machine/quickstart) docs.
{% endtab %}
{% endtabs %}

### Captured real-time channels

{% embed url="<https://ascendex.github.io/ascendex-futures-pro-api-v2/#websocket>" %}
See AscendEX Exchange WebSocket API docs providing documentation for each captured channel's format
{% endembed %}

{% hint style="info" %}
Click any channel below to see [HTTP API](https://docs.tardis.dev/api/http-api-reference#data-feeds-exchange) response with historical data recorded for it.
{% endhint %}

* [trades](https://api.tardis.dev/v1/data-feeds/ascendex?from=2024-01-01\&filters=\[{%22channel%22:%22trades%22}]) Public trade executions stream
* [depth-realtime](https://api.tardis.dev/v1/data-feeds/ascendex?from=2024-01-01\&filters=\[{%22channel%22:%22depth-realtime%22}]) Order book incremental updates stream
* [depth-snapshot-realtime](https://api.tardis.dev/v1/data-feeds/ascendex?from=2024-01-01\&filters=\[{%22channel%22:%22depth-snapshot-realtime%22}]) Order book snapshots followed by real-time deltas
* [bbo](https://api.tardis.dev/v1/data-feeds/ascendex?from=2024-01-01\&filters=\[{%22channel%22:%22bbo%22}]) Best bid and ask updates stream
* [futures-pricing-data](https://api.tardis.dev/v1/data-feeds/ascendex?from=2024-01-01\&filters=\[{%22channel%22:%22futures-pricing-data%22}]) Futures mark price, index price and funding related updates

### Market data collection details

[Market data collection infrastructure](https://docs.tardis.dev/faq/general#what-is-your-infrastructure-setup) for AscendEX is located in GCP asia-northeast1 (Tokyo, Japan).

Real-time market data is captured via **multiple WebSocket connections** to `wss://ascendex.com/api/pro/v2/stream`.

{% hint style="info" %}
AscendEX servers are located in AWS ap-northeast-1 region (Tokyo, Japan).
{% endhint %}