Documentation Index
Fetch the complete documentation index at: /llms.txt
Use this file to discover all available pages before exploring further.
Avantis v2 is live as of August 12, 2026. Migrating from v1? Read the migration guide.
Polled prices and four real-time feeds.
price = await client.markets.price("ETH/USD") # latest feed price, float
| Factory | Transport | Delivers | Notes |
|---|---|---|---|
client.lazer_price_stream(feed_ids) | SSE | Prices, lowest latency | Feed ids from pair.lazer_feed.feed_id |
client.hermes_price_stream(feed_ids) | Pyth Hermes WS | Prices | 0x-hex Pyth feed ids |
client.pair_data_stream() | Socket.IO | Funding / OI / spread updates | Needs pip install 'avantis-trader-sdk[streams]'. Protocol: Pair data Socket.IO |
client.order_event_stream(trader=None) | Pusher WS | Your fills and cancels | Idle unless your orders execute |
await stream.run(callback) blocks and invokes the callback per event; stream.stop() ends it.
eth = await client.markets.pair("ETH/USD")
stream = client.lazer_price_stream([eth.lazer_feed.feed_id])
async def on_price(update): # PriceUpdate
print(update.feed_id, update.price, update.best_bid, update.best_ask)
await stream.run(on_price)
PriceUpdate fields: feed_id, price, timestamp_ms, best_bid, best_ask, raw.
GET /v2/trading and
deep-merge. Full handshake, hosts, and payload rules:
Pair data Socket.IO.
# pip install 'avantis-trader-sdk[streams]'
stream = client.pair_data_stream()
async def on_pairs(diff): # raw RES:DATA dict
print(list(diff.get("pairInfos", {})))
await stream.run(on_pairs)
orders = client.order_event_stream()
async def on_event(ev): # OrderEvent
print(ev.event, ev.data) # OrderPickedUpForExecution, ExecutionConfirmedInFlashblock,
# OrderFilled, OrderCanceled
await orders.run(on_event)