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

# Python Configuration

> Configure Python endpoints, HTTP timeouts, reconnects, replay buffers, and orderbook integrity.

The public endpoints are defaults. Override them only when PolyNode gives you another endpoint.

```python theme={null}
import os
from polynode import PolyNode

pn = PolyNode(
    api_key=os.environ["POLYNODE_API_KEY"],
    base_url="https://api.polynode.dev",
    ws_url="wss://ws.polynode.dev/ws",
    ob_url="wss://ob.polynode.dev/ws",
    rpc_url="https://rpc.polynode.dev",
    timeout=10.0,
)
```

Use context managers to close HTTP clients. Streams have their own explicit lifecycle.

```python theme={null}
from polynode import PolyNodeWS
from polynode.types.ws import WsOptions

events = PolyNodeWS(
    os.environ["POLYNODE_API_KEY"],
    "wss://ws.polynode.dev/ws",
    WsOptions(
        compress=True,
        auto_reconnect=True,
        max_reconnect_attempts=0,  # 0 means unlimited
        reconnect_base_delay=1.0,
        reconnect_max_delay=30.0,
        subscribe_timeout=30.0,
        subscription_queue_capacity=4096,
        dedupe_capacity=4096,
        replay_overlap_ms=1,
    ),
)
```

Configure PN1 through `OrderbookEngine(..., integrity=True, allow_stale_reads=False)`. Configure perps capacity and reconnect behavior through `PerpsWS(...)` constructor arguments.

Event and perps queues are bounded. Observe overflow callbacks and keep slow work out of message handlers. API keys belong in environment variables or a secret manager, never source code or logs.