> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://docs.immix.xyz/sdk/python/llms.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://docs.immix.xyz/_mcp/server.

# Python SDK

The Python SDK covers the REST API and the market-data WebSocket. Its core is generated from the
same contracts this portal documents, so it follows them release by release. A small
hand-written layer adds what a generator cannot: a market-data stream that authenticates and
reconnects by itself, and helpers for money and idempotency keys.

> **Note**
>
> The SDK is in **private preview**. Access is granted per organisation during onboarding, and you
> receive each release as a Python wheel. It is not on a public package index yet.

## Install

The SDK needs Python 3.10 or newer. Install the wheel you were given:

```bash
pip install immix-<version>-py3-none-any.whl
```

The package imports as `immix`.

## The REST API

There is no public REST environment yet, so pass the base URL your onboarding gave you:

```python
from immix import Immix

client = Immix(base_url="https://<your REST base URL>", token=token)
me = client.users.get_me()
print(me.org_name, [c.value for c in me.capabilities])
```

Every write takes an idempotency key: `immix.new_idempotency_key()` mints one. Keep it, and send
the same key when you retry that write. Money is a decimal string, and `immix.to_decimal` and
`immix.format_decimal` cross to and from `Decimal` exactly — never through a float.

## Market data

```python
import asyncio

from immix import MarketData, Reconnected
from immix.market_data import TradeEvent


async def main() -> None:
    async with MarketData(token=token) as md:
        await md.subscribe("trade.OKX@BTC/USDT")
        async for frame in md:
            if isinstance(frame, Reconnected):
                print("reconnected: frames sent meanwhile were not seen")
            elif isinstance(frame, TradeEvent):
                for fill in frame.data:
                    print(frame.topic, fill.side.value, fill.qty, "@", fill.px)


asyncio.run(main())
```

`MarketData` opens the production socket. It sends your token as a message once the socket is
open, never in the handshake. When the connection drops, it reconnects, authenticates again and
resubscribes every topic it held, then yields `Reconnected` where the gap is. Every frame is a
typed model of the [Market Data WebSocket reference](/api-reference/market-data/overview). A refused token
raises `immix.AuthenticationError`, and a subscription refused as a whole raises
`immix.SubscriptionError`.

> Private preview — both APIs from Python