Aperiodic Python Client

Python client library for Aperiodic.io — institutional-grade market microstructure, liquidity and order flow metrics with full exchange universe coverage. Turn flow dynamics into alpha in hours, not months. No tick infrastructure to build or maintain.

Access pre-computed derivative and microstructure metrics with parallel downloads for optimal performance.

Installation

pip install aperiodic

Install from source:

git clone https://github.com/aperiodic-io/aperiodic-client.git
cd aperiodic-client
pip install -e .

Authentication

All endpoints require your Aperiodic.io API key passed as api_key="...".

The one exception is preview data: with preview=True the api_key is optional — omit it and the shared public demo key is used automatically.

Symbology

Symbols are expected in Atlas unified symbology — a standardised, exchange-agnostic naming scheme.

• Atlas repo: https://github.com/aperiodic-io/atlas
• Example symbol: perpetual-BTC-USDT:USDT

Quick Start

from datetime import date
from aperiodic import get_metrics

df = get_metrics(
    api_key="your-api-key",
    metric="flow",
    timestamp="true",
    interval="1h",
    exchange="binance-futures",
    symbol="perpetual-BTC-USDT:USDT", # See https://github.com/aperiodic-io/atlas
    start_date=date(2024, 1, 1),
    end_date=date(2024, 1, 31),
)

print(df.head())
print(df.columns)

Available Functions

Dataset	Sync	Async	metric values
Order, L1, L2 metrics	get_metrics	get_metrics_async	see below
OHLCV candles	get_ohlcv	get_ohlcv_async	—
VWAP	get_vwap	get_vwap_async	—
TWAP	get_twap	get_twap_async	—
Derivative metrics	get_derivative_metrics	get_derivative_metrics_async	see below
Exchange symbols	get_symbols	get_symbols_async	—

get_metrics — Trade & order book metrics

Trade metrics (TradeMetric): "vtwap", "flow", "trade_size", "impact", "range", "updownticks", "run_structure", "returns", "slippage"

L1 order book (L1Metric): "l1_price", "l1_imbalance", "l1_liquidity"

L2 order book (L2Metric): "l2_imbalance", "l2_liquidity"

get_derivative_metrics — Derivative metrics

"basis", "funding", "open_interest", "derivative_price"

Core Parameters

All data endpoints share this shape:

• api_key: Your Aperiodic.io API key. Optional when preview=True — the shared public demo key is used automatically.
• timestamp: "exchange" or "true".
• interval: "1m" | "5m" | "15m" | "30m" | "1h" | "4h" | "1d".
• exchange: "binance-futures" | "okx-perps" | "hyperliquid-perps".
• symbol: Atlas-formatted symbol string (e.g. "perpetual-BTC-USDT:USDT").
• start_date / end_date: Inclusive date boundaries.
• preview: bool = False. When True, routes to the free preview endpoint — no subscription required, but the request must match an exact whitelisted parameter combination (exchange, symbol, interval, timestamp, date range).
• show_progress: show tqdm progress bar (default: True).
• max_concurrent: max parallel file downloads (default: 10).

Examples

Trade metrics

from datetime import date
from aperiodic import get_metrics

flow_df = get_metrics(
    api_key="your-api-key",
    metric="flow",
    timestamp="exchange",
    interval="5m",
    exchange="binance-futures",
    symbol="perpetual-ETH-USDT:USDT", # See https://github.com/aperiodic-io/atlas
    start_date=date(2024, 2, 1),
    end_date=date(2024, 2, 29),
)

L1 / L2 order book metrics

from datetime import date
from aperiodic import get_metrics

l1_df = get_metrics(
    api_key="your-api-key",
    metric="l1_imbalance",
    timestamp="true",
    interval="1m",
    exchange="binance-futures",
    symbol="perpetual-BTC-USDT:USDT", # See https://github.com/aperiodic-io/atlas
    start_date=date(2024, 3, 1),
    end_date=date(2024, 3, 7),
)

l2_df = get_metrics(
    api_key="your-api-key",
    metric="l2_liquidity",
    timestamp="true",
    interval="1m",
    exchange="binance-futures",
    symbol="perpetual-BTC-USDT:USDT", # See https://github.com/aperiodic-io/atlas
    start_date=date(2024, 3, 1),
    end_date=date(2024, 3, 7),
)

Derivative metrics

from datetime import date
from aperiodic import get_derivative_metrics

funding_df = get_derivative_metrics(
    api_key="your-api-key",
    metric="funding",
    timestamp="exchange",
    interval="1h",
    exchange="binance-futures",
    symbol="perpetual-BTC-USDT:USDT", # See https://github.com/aperiodic-io/atlas
    start_date=date(2024, 1, 1),
    end_date=date(2024, 3, 31),
)

Symbol discovery

from aperiodic import get_symbols

symbols = get_symbols(api_key="your-api-key", exchange="binance-futures") # Returns Atlas symbols: https://github.com/aperiodic-io/atlas
perpetuals = [s for s in symbols if s.startswith("perpetual-")]
print(f"Found {len(perpetuals)} perpetual symbols")

Async usage

import asyncio
from datetime import date
from aperiodic import get_metrics_async, get_symbols_async

async def main() -> None:
    symbols = await get_symbols_async(
        api_key="your-api-key",
        exchange="binance-futures",
    )
    for symbol in symbols:
        df = await get_metrics_async(
            api_key="your-api-key",
            metric="l1_liquidity",
            timestamp="true",
            interval="1h",
            exchange="binance-futures",
            symbol=symbol, # See https://github.com/aperiodic-io/atlas
            start_date=date(2024, 1, 1),
            end_date=date(2026, 1, 1),
        )

asyncio.run(main())

Preview (no subscription required)

Anyone can access a curated slice of data via preview=True — no subscription and no API key required. Omit api_key and the client uses the shared public demo key automatically. The request must match the exact parameters (exchange, symbol, interval, timestamp, date range) for one of the whitelisted entries.

Available preview datasets: aperiodic.io/catalog#preview

from datetime import date
from aperiodic import get_ohlcv

# Use the exact parameters listed at https://aperiodic.io/catalog#preview
df = get_ohlcv(
    exchange="binance-futures",
    symbol="perpetual-BTC-USDT:USDT",
    interval="5m",
    timestamp="exchange",
    start_date=date(2025, 5, 1),
    end_date=date(2025, 5, 31),
    preview=True,
)

print(df.head())

Performance Notes

• Downloads are split into monthly parquet files server-side.
• Files are fetched concurrently and concatenated locally.
• Final output is sorted and filtered to your exact requested date range.
• Tune max_concurrent based on your network and compute resources.

Requirements

• Python 3.11+
• httpx
• polars
• tqdm
• nest-asyncio

License

MIT